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Cas Database

7704-34-9

7704-34-9

Identification

  • Product Name:Sulfur

  • CAS Number: 7704-34-9

  • EINECS:231-722-6

  • Molecular Weight:33.0739

  • Molecular Formula: S

  • HS Code:2802.00

  • Mol File:7704-34-9.mol

Synonyms:Sultaf;Brimstone;Sulfur, solid;sulfur donor;Sublimed sulfur;Super cosan;Kolloidschwefel 95;Sulfidal;Sulfur, rhombic;Ground vocle sulfur;Sulfex;Cosan 80;Sulfur atom;Netzschwefel;Sulforon;Sulfur ointment;Kolofog;Shreesul;Agri-Sul;Thiovit;Sulfur, sublimed;Dispersul;Precipitated sulfur;Ultra Sulfur;Sufran;Sulfur, pharmaceutical;Magnetic 6;Flour sulfur;Spersul thiovit;Kumulus;Gofrativ;Micowetsulf;Kumulus FL;Sulkol;Bensulfoid;Sulsol;Colloidal-S;Sulfur (JP14);Molten Sulfur;Sulfur,Sublimed;sulphur;

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Safety information and MSDS view more

  • Pictogram(s):FlammableF

  • Hazard Codes:F,Xi

  • Signal Word:Warning

  • Hazard Statement:H315 Causes skin irritation

  • First-aid measures: General adviceConsult a physician. Show this safety data sheet to the doctor in attendance.If inhaled If breathed in, move person into fresh air. If not breathing, give artificial respiration. Consult a physician. In case of skin contact Wash off with soap and plenty of water. Consult a physician. In case of eye contact Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician. If swallowed Never give anything by mouth to an unconscious person. Rinse mouth with water. Consult a physician.

  • Fire-fighting measures: Suitable extinguishing media Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide. Wear self-contained breathing apparatus for firefighting if necessary.

  • Accidental release measures: Use personal protective equipment. Avoid dust formation. Avoid breathing vapours, mist or gas. Ensure adequate ventilation. Evacuate personnel to safe areas. Avoid breathing dust. For personal protection see section 8. Prevent further leakage or spillage if safe to do so. Do not let product enter drains. Discharge into the environment must be avoided. Pick up and arrange disposal. Sweep up and shovel. Keep in suitable, closed containers for disposal.

  • Handling and storage: Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Avoid exposure - obtain special instructions before use.Provide appropriate exhaust ventilation at places where dust is formed. For precautions see section 2.2. Store in cool place. Keep container tightly closed in a dry and well-ventilated place.

  • Exposure controls/personal protection:Occupational Exposure limit valuesBiological limit values Handle in accordance with good industrial hygiene and safety practice. Wash hands before breaks and at the end of workday. Eye/face protection Safety glasses with side-shields conforming to EN166. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU). Skin protection Wear impervious clothing. The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace. Handle with gloves. Gloves must be inspected prior to use. Use proper glove removal technique(without touching glove's outer surface) to avoid skin contact with this product. Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. Wash and dry hands. The selected protective gloves have to satisfy the specifications of EU Directive 89/686/EEC and the standard EN 374 derived from it. Respiratory protection Wear dust mask when handling large quantities. Thermal hazards

Supplier and reference price

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  • Manufacture/Brand:TRC
  • Product Description:Sulfur(>80%)
  • Packaging:1kg
  • Price:$ 180
  • Delivery:In stock
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur (99.999%)
  • Packaging:100g
  • Price:$ 192
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur powder, precipitated, purified
  • Packaging:250g
  • Price:$ 33
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur powder, sublimed (99+%)
  • Packaging:250g
  • Price:$ 33
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur (99.999%)
  • Packaging:500g
  • Price:$ 768
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur powder, precipitated, purified
  • Packaging:1kg
  • Price:$ 69
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur powder, sublimed (99+%)
  • Packaging:1kg
  • Price:$ 69
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  • Manufacture/Brand:Strem Chemicals
  • Product Description:Sulfur (99.999%)
  • Packaging:25g
  • Price:$ 64
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Sulfur purum p.a., ≥99.5% (T)
  • Packaging:1kg
  • Price:$ 153
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  • Manufacture/Brand:Sigma-Aldrich
  • Product Description:Sulfur ICP standard traceable to SRM from NIST H?SO? in H?O 10000 mg/l S Certipur?
  • Packaging:1703850100
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Relevant articles and documentsAll total 219 Articles be found

Steele, B. D.,Bagster, L. S.

, p. 2607 (1910)

Moody, David C.,Ryan, R. R.,Salazar, Kenneth, V.

, p. 221 - 224 (1981)

EFFECT OF PREADSORBED SULFUR ON NITRIC OXIDE REDUCTION ON POROUS PLATINUM BLACK ELECTRODES.

Foral,Langer

, p. 257 - 263 (1988)

Sulfur can be deposited on porous platinum black gas diffusion cathodes to influence the course of the electrogenerative reduction of nitric oxide. Polarization (performance) curves and reactor selectivity data are compared for untreated cathodes and thos

Decoration of sulfur with porous metal nanostructures: An alternative strategy for improving the cyclability of sulfur cathode materials for advanced lithium-sulfur batteries

Tao, Xinyong,Chen, Feng,Xia, Yang,Huang, Hui,Gan, Yongping,Chen, Xiaorong,Zhang, Wenkui

, p. 4513 - 4515 (2013)

Porous Pt nanostructure decorated sulfur microparticles (Pt@S) are fabricated using sulfur as the template. The Pt@S electrode shows a higher volumetric specific capacity of 520 mA h cm-3 and improved cyclability with only 15% capacity fading a

Donath, E.

, p. 141 - 143 (1901)

Unusual syntheses, structures, and electronic properties of compounds containing ternary, T3-type supertetrahedral M/Sn/S anions [M 5Sn(μ3-S)4(SnS4) 4]10- (M = Zn, Co)

Zimmermann, Christian,Anson, Christopher E.,Weigend, Florian,Clerac, Rodolphe,Dehnen, Stefanie

, p. 5686 - 5695 (2005)

A recently discovered series of quaternary compounds of the general type [Km(ROH)n][MxSnySez] (R = H, Me), containing ternary anions with [SnSe4]4-- coordinated transition metal centers (M = Co, Mn, Zn, Cd, Hg) has now been extended by the synthesis and characterization of the two ortho-thiostannate- coordinated species, [Na10(H2O)32][M 5Sn(μ3-S)4(SnS4) 4]·2H2O (M = Zn (1), Co (2)). The central structural motifs of compounds 1 and 2 are highly charged [M5Sn(μ 3-S)4(SnS4)4]10- anions, being the first T3-type supertetrahedral ternary anions reported to date. The exposure of single crystals of 2 to a dynamic vacuum for several hours resulted in the reversible formation of a partially dehydrated, but still monocrystalline material of the composition [Na10(H2O) 6][Co5Sn(μ3-S)4-(SnS 4)4] (3). The loss of 28 of the 34 water molecules only slightly affects the internal structure of the ternary anion in 3 and leads to a significant compacting of the crystal structure with closer linkage of the [Co5Sn5S20]10- cluster units via the Na+ cations. Magnetic measurements on 3 show that the ground state of the Co/Sn/S cluster is S = 1/2, indicating a significant antiferromagnetic coupling between the Co centers, which has also been rationalized by DFT investigations of the electronic situation in the ternary subunits of 1-3.

Kinetic regularities of recovery of metals from raw materials of industrial origin

Velikanova,Semchenko,Khentov

, p. 1470 - 1475 (2011)

Kinetics of recovery of metals from the wastes and poor ores, which contain oxide and sulfide minerals of copper, vanadium, and silver with an azomethine solution in organic solvent was studied. The optimal parameters of the recovery were suggested.

Platinum-based electrocatalysts for generation of hydrogen peroxide in aqueous acidic electrolytes. Rotating ring-disk studies

Mo, Yibo,Scherson, Daniel A.

, p. E39-E46 (2003)

The electrocatalytic activity of selenium-, and sulfur-modified polycrystalline Pt electrodes for O2 reduction in acid media has been examined using rotating ring-disk electrode techniques. The results obtained indicated that, within a rather narrow range of coverages, both Se-, and S-modified Pt surfaces promote O2 reduction via a two-electron pathway to yield hydrogen peroxide at close to 100% faradaic efficiency over a wide potential region. Also presented in this work is an experimental procedure for Se-modification of high area, unsupported Pt particles based on fluidized packed bed reactor principles. Such a strategy could be readily scaled up opening new prospects for the development of large scale hydrogen peroxide generation in acid media, including electrochemically based, room temperature, Nafion-based oxygen concentrators.

The Dissociation Rate of S2 Produced from COS Pyrolysis

Higashihara, Tetsuo,Saito, Ko,Murakami, Ichiro

, p. 15 - 18 (1980)

The disappearance rate of S2, which was produced from the pyrolysis of COS, was measured behind incident shock waves by monitoring the UV emission in the temperature range of 4500-6000 K and in the pressure range of 0.32-0.5 atm.It was found that two proc

Benedikt, R.,Bamberger, M.

, (1891)

Infrared studies of the adsorption and surface reactions of hydrogen sulfide and sulfur dioxide on some aluminas and zeolites

Deo,Lana, I.G.Dalla,Habgood

, p. 270 - 281 (1971)

Adsorption of hydrogen sulfide, sulfur dioxide, and their mixtures on four different catalysts has been studied by infrared spectroscopy of the catalyst surfaces. The four catalysts, which show a wide range of acidity and are all active for the Claus reaction (2H2S + SO2 → 3S + 2H2O), were γ-alumina (the main constituent of commercial bauxite catalysts), γ-alumina doped with NaOH, sodium Y zeolite, and hydrogen Y zeolite. All catalysts showed physical adsorption of both reactants with strong hydrogen bonding to surface OH groups. This would suggest that the role of the catalyst is primarily to bring the reactants together in suitable orientation. On the other hand, γ-alumina shows, on heating with SO2, a chemisorbed SO2 species which may be a reaction intermediate. The NaOH-treated γ-alumina shows a second chemisorbed SO2 species which is irreversibly adsorbed and thus may be a catalyst poison.

Properties of a new nanosized tin sulphide phase obtained by mechanochemical route

Balaz,Takacs,Ohtani,Mack,Boldizarova,Soika,Achimovicova

, p. 76 - 82 (2002)

The paper deals with the properties of a new 4H-SnS2 phase (N-phase) synthesized together with berndtite 4H-SnS2 by a mechanochemical route from elemental tin and sulphur. The surface and bulk properties of SnS2 phases were verified by surface area measurements, particle size analysis, electron microscopy, XRD, M?ssbauer spectroscopy and chemical dissolution methods. The particles of synthesized product are 12-18 nm in size and during milling, secondary particles (aggregates) are formed that are 20-60 μm in size. The particle size and a high developed surface area (7-21 m2 g-1) greatly influence the solid-liquid reaction and solid transformations of mechanosynthesized tin sulphide products.

Wright, L. T.

, p. 156 - 156 (1883)

Preparation of MoS2 by a novel mechanochemical method

Wu, Zhuangzhi,Wang, Dezhi,Sun, Aokui

, p. L5-L7 (2010)

A novel simple process for preparing MoS2 by a mechanochemical route under the normal temperature and pressure has been developed. In this method, the mechanochemical solid-state reaction was completed in a high-energy planetary ball mill filled with pure argon. The effects of milling time and speed were discussed and the product was characterized by XRD, DSC and TEM. It is found that the as-obtained samples are MoS2 with short low stacked layers less than 10 nm, which have potential application in the highly active catalysts. Crown Copyright

Matthews, E.

, (1926)

Carbon nanofiber-sulfur composite cathode materials with different binders for secondary Li/S cells

Rao, Mumin,Song, Xiangyun,Liao, Honggang,Cairns, Elton J.

, p. 228 - 233 (2012)

A sulfur-coated carbon nanofiber (CNF-S) composite cathode material was prepared by a chemical deposition method in an aqueous solution. This CNF-S material was evaluated as the cathode material in lithium/sulfur cells with three different binders. The results of the SEM and TGA measurements reveal that CNF-S has a typical core-shell structure, containing 75.7 w/o sulfur coated uniformly on the surface of the CNFs. The effects of different binders on the potential profiles, electrode capacity and capacity retention with cycling were investigated. The electrode prepared with CMC + SBR binder has the best performance compared with PVdF and PEO binders, exhibiting a specific capacity of up to 1313 mAh g-1 S at the initial discharge and a specific capacity of 586 mAh g-1 S after 60 cycles.

Dunnicliff, H. B.,Nijhawan, S. D.

, (1926)

Single-photon spectroscopy of singlet sulfur atoms and the autoionization lifetime measurements of the superexcited singlet states

Huang, Jianhua,Xu, Dadong,Stuchebrukhov, Alexei,Jackson, William M.

, (2005)

Single-photon excitation spectra from the lowest singlet D 21 level of sulfur atoms were recorded with a tunable vacuum ultraviolet (VUV) radiation source generated by frequency tripling in noble gases. The photolysis of CS2 at 193 nm was used to produce the singlet S (D 21) sulfur atoms that were then excited to neutral superexcited states with the tunable VUV radiation. These superexcited states undergo autoionization into the first ionization continuum state of S+ (S 32 o4) + e-, which is not directly accessible from the S (D 21) state via an allowed transition. The excitation spectra were recorded by monitoring the S+ signal in a velocity imaging apparatus while scanning the VUV excitation wavelength. Three new lines were observed in the spectra which have not been previously reported. The full widths at half maximum (FWHM) of each of the observed transitions were determined by fitting the profiles of each absorption resonances with the Fano formula. Autoionization lifetimes τ of these singlet superexcited states were obtained from FWHM using the Uncertainty Principle. Abnormal autoionization lifetimes were found for the 3 s2 3 p3 (D o2) nd (D 21) and the 3 s2 3 p3 (D o2) ns (D 21) Rydberg series, in which τ (5d) and τ (7s) are shorter than τ (4d) and τ (6s), respectively. This is contrary to the well-known scaling law of τ (n*) ∝ n*3, which should be followed within a series unless there exist perturbations from other series or new channels open up to which some members of the series can decay. Possible perturbations from the nearby triplet series are suspected for causing the broadening of the 5d and 7s levels.

Use of cobalt(II) phthalocyanine sulfonates in gas purification to remove hydrogen sulfide

Faddeenkova,Kundo

, p. 1946 - 1950 (2003)

Experiments on liquid-phase oxidation of H2S with oxygen in the presence of catalysts, cobalt phthalocyanine sulfonates [CoPc(SO 3Na)n], were performed on a laboratory static installation in order to find conditions under which a stationary oxidation mode can be established at pH ≥ 8. The influence exerted by additional introduction of a soluble salt of Mn2+ (MnSO4, MnCl2) into the reaction mixture at various pH values was studied.

Perkins, W. H.,King, A. T.

, p. 300 - 307 (1913)

Carter, S. R.,Butler, J. A. V.

, p. 2370 - 2370 (1923)

Measurement of the autoionization lifetime of the superexcited atomic sulfur S(3S23p3(2D°)4d) state using tunable vacuum ultraviolet (VUV) radiation

Huang, Jianhua,Xu, Dadong,Stuchebrukhov, Alexei,Jackson, William M.

, p. 885 - 890 (2004)

A new method is described that combines a tunable coherent vacuum ultraviolet (VUV) radiation source and an ion velocity imaging apparatus to study the autoionization of superexcited sulfur atoms. The photolysis of CS 2 at 193 nm is used to produce metastable sulfur atoms in the 1D2 state. The S(1D2) atom is then directly excited to the neutral superexcited state 3s23p 3(2D°)4d (1D2°) at 11.317 eV with a tunable VUV photon at ~121.896 nm. This excited state then undergoes autoionization into the first ionization continuum state of S+( 4S3/2°) + e-, which is not directly accessible from the S(1D2) state through optical transition. By monitoring the S+ signal in the time-of-flight mass spectrometer while scanning the excitation wavelength, the line profile of the 3s23p34d 1D2° ← 3s 23p4 1D2 transition is recorded and found to have a full width at half maximum (FWHM) of 0.9 cm-1. This has been used to determine an autoionization lifetime of the neutral superexcited 3s 23p34d 1D2° state of 5.9 ps. The accurate measurement of the autoionization lifetime provides a benchmark for testing fundamental theoretical models of processes occurring in excited states of atoms.

Carter, S. R.,Butler, J. A. V.

, p. 2380 - 2380 (1923)

Activation of La2O3 for the catalytic reduction of SO2 by CO

Ma, Jianxin,Fang, Ming,Lau, Ngai Ting

, p. 271 - 278 (1996)

Lanthanum oxide by itself has been reported to be inactive for the reduction of SO2 by CO; however, we discovered that La2O3 can be activated in a reaction gas atmosphere if previously hydrated. The active phase of the activated lanthanum oxide was identified to be lanthanum oxysulfide by using X-ray diffraction. This showed that the activation was in essence a sulfidization of the oxide. An activation mechanism is proposed based on the surface acidic and basic properties resulting from the dehydroxylation of the lanthanum hydroxide.

Wardlaw, W.,Carter, S. R.,Clews, F. H.

, p. 1241 - 1241 (1920)

Catalytic reduction of sulfur dioxide on iron- alumina bifunctional catalysts

KHALAFALLA SE,FOERSTER EF,HAAS LA

, p. 133 - 137 (1971)

Mixtures of alumina and iron powder provide efficient catalysts for the interaction of low concentrations of SO//2 with CO. The catalytic reaction rate at 500 C depended significantly on the iron content of the binary catalyst mixture. Mixtures containing 43% freshly reduced iron exhibited a sharp peak in the catalytic activity at 500 C when compared with other catalyst compositions. The normalized reaction rate per gram of iron, instead of per gram of total catalyst, still portrayed a sharp maximum when plotted against the weight fraction of iron in the catalyst.

Sato, Tetsuya,Kinugawa, Tohru,Arikwawa, Tatsuo,Kawasaki, Masahiro

, p. 173 - 182 (1992)

Characterization and HDS activity of mesoporous MoS2 catalysts prepared by in situ activation of tetraalkylammonium thiomolybdates

Alonso,Berhault,Aguilar,Collins,Ornelas,Fuentes,Chianelli

, p. 359 - 369 (2002)

Unsupported molybdenum disulfide catalysts with unique morphological pore structure were synthesized from tetraalkyammonium thiometalates precursors by in situ activation during the hydrodesulfurization (HDS) of dibenzothiophene. The precursors used in this study are ammonium thiomolybdate (ATM), tetrapropylammonium thiomolybdate, tetrapentylammonium thiomolybdate, tetrahexylammonium thiomolybdate, tetraheptylammonium thiomolybdate (THepATM), and tetraoctylammonium thiomolybdate. The thermogravimetrical analysis carried out under nitrogen demonstrated that all precursors yield MoS2 bulk structure at 623 K, after one or two decomposition steps. The morphology of these catalysts observed by scanning electron microscopy presents large hemispherical or ovoid cavities with a cheese-like porous arrangement, high surface area (from 255 up to 329 m2/g), high content of carbon (C/Mo = 2.7-4.0), and type IV adsorption-desorption isotherms of nitrogen. The nature of the alkyl group affects the surface area, the pore size distribution, and the HDS selectivity. The highest selectivity for direct C-S bond cleavage is observed for the molybdenum disulfide catalyst formed from THepATM. X-ray diffraction studies showed that the catalysts are poorly crystallized, with a very weak intensity of the (002) line of 2H-MoS2 characteristic of exfoliated samples.

Corrosion mechanism of nickel in hot, concentrated H2SO4

Kish,Ives,Rodda

, p. 3637 - 3646 (2000)

Electrochemical techniques, complemented by weight change and ex situ X-ray spectroscopic measurements, were employed to characterize the corrosion of nickel in concentrated H2SO4 solutions. By use of a rotating cylinder electrode, it was found that corrosion is a mass-transport controlled process with the convective diffusion of nickel cations from a saturated NiSO4 layer as its rate-determining step. The oxidizing nature of the acid solution leads to the formation of additional corrosion products including metastable NiS, and elemental sulfur along with NiSO4, none of which is protective. When present on the surface, NiS establishes a galvanic interaction with the uncovered metal, significantly polarizing the anodic metal dissolution reaction. Since corrosion is mass-transport controlled, the resultant corrosion rate of the metal is unaffected during the galvanic-induced polarization.

Dudzik, Z.,George, Z. M.

, p. 72 - 82 (1980)

The synthesis and characterization of Pb5S2I6 whiskers and tubules

Yang, Qing,Tang, Kaibin,Wang, Chunrui,Zuo, Jian,Qian, Yitai

, p. 670 - 674 (2003)

Pb5S2I6 whiskers and tubules were synthesized from the reaction among lead chloride, thiourea, and excess sodium iodide under hydrothermal conditions at 200 °C for 20-40 h. XRD, SEM, XPS, ICP-AES, and TEM characterized the final products. Most products are whiskers with structure of 3-4 mm in length, 0.5-2.0 μm in diameter for a singular one. Meanwhile, about 10% tubules are produced in the process. The tubules are 3-6 mm in length, 8-20 μm in diameter, and 1-3 μm in thickness. Nanowhiskers were also produced in the route at 180-200 °C for 8-10 h. Raman spectra show that the Pb5S2I6 crystals have complex vibrational modes of PbS and PbI2.

Oxidation of zinc sulfide in the system HNO3-Fe(NO 3)3-H2O

Ostanova,Chubarov,Drozdov,Patrushev

, p. 1354 - 1356 (2002)

The behavior of zinc sulfide in the system HNO3-Fe(NO 3)3-H2O at 25, 55, and 80°C was studied using the simplex-lattice design method.

Iwasawa, Y.,Ogasawara, S.

, p. 132 - 142 (1977)

Isotope effects and excitation functions for the reactions of S(1D) + H2, D2 and HD

Lee, Shih-Huang,Liu, Kopin

, p. 323 - 328 (1998)

Excitation functions for the title reactions were determined from 0.6 to 6 kcal/mol. Contrary to the analogous reaction of O(1D), it appears that the reaction of S(1D) proceeds solely through insertion over this energy range. Compared to other reactions, an intriguing H/D isotope effect was revealed. The propensity of the intramolecular H/D branching found under thermal conditions for A + HD reactions appears to be reverse for a supersonically cooled HD reagent. This finding implies that the reagent rotation could have profound influences on radical reactivity not only for an activated abstraction reaction, but for a barrierless inserted one.

A facile in situ sulfur deposition route to obtain carbon-wrapped sulfur composite cathodes for lithium-sulfur batteries

Su, Yu-Sheng,Manthiram, Arumugam

, p. 272 - 278 (2012)

An in situ sulfur deposition route has been developed for synthesizing sulfur-carbon composites as cathode materials for lithium-sulfur batteries. This facile synthesis method involves the precipitation of elemental sulfur at the interspaces between carbon nanoparticles in aqueous solution at room temperature. The product has been characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, charge-discharge measurements, and electrochemical impedance spectroscopy. The sulfur-carbon composite cathode with 75 wt.% active material thus obtained exhibits a remarkably high first discharge capacity of 1116 mAh g-1 with good cycle performance, maintaining 777 mAh g-1 after 50 cycles. The significantly improved electrochemical performance of the sulfur-carbon composite cathode is attributed to the carbon-wrapped sulfur network structure, which suppresses the loss of active material during charging/discharging and the migration of the polysulfide ions to the anode (i.e., shuttling effect). The integrity of the cathode structure during cycling is reflected in low impedance values observed after cycling. This facile in situ sulfur deposition route represents a low-cost approach to obtain high-performance sulfur-carbon composite cathodes for rechargeable Li-S batteries.

Pursuing new facts in the coordination capabilities of (1-diaminomethylene)thiourea (HATU): Products of the interaction with transition metal halides - Structural investigations

Ho?yńska, Ma?gorzata,Korabik, Maria,Kubiak, Maria

, p. 530 - 538 (2010)

This work is part of our studies on the reactivity and crystal engineering of (1-diaminomethylene)thiourea (HATU). Structure and other properties of the selected products of the interaction of HATU with transition metal halides, also in the presence of 3%

Thermodynamics of copper sulfides. II. Heat capacity and thermodynamic properties of synthetic covellite, CuS, from 5 to 780.5 K. Enthalpy of decomposition

Westrum, Edgar F.,Stoelen, Svein,Groenvold, Fredrik

, p. 1199 - 1208 (1987)

The heat capacity of CuS has been measured by adiabatic shield calorimetry from 5 to 840 K.The heat capacity increases regularly up to about 750 K and then more strongly as the decomposition temperature (780.5 K) of covellite into high-digenite and sulfur is approached.The molar enthalpy and molar entropy of decomposition are 2149.3R*K and 2.755R.Above 780.5 K the uptake of sulfur in the high-digenite causes a further rise in the heat capacity.The low-temperature values increase more strongly than expected from the Debye relation with a Debye temperature estimated from the intermediate-temperature behavior.This phenomenon as well as a small bump in the heat capacity around 55 K are discussed.The resulting molar enthalpy and molar entropy at 298.15 and 825 K are 1136.6R*K, 8.101R, and 6744.2R*K, 17.393R, respectively.

Electrochemical studies of the effects of pH and the surface structure of gold substrates on the underpotential deposition of sulfur

Alanyaliogì?lu, Murat,Cì§akal, Hilal,Oì?ztuì?rk, A. Emin,Demir, Uì?mit

, p. 10588 - 10593 (2001)

The kinetics of the electrochemical deposition and desorption of sulfur monolayers on highly oriented Au(111) and polycrystalline Au electrodes in aqueous solutions containing sodium sulfide was studied by cyclic voltammetry, chronocoulometry, and chronoamperometry. Cyclic voltammetry experiments reveal that underpotential deposition (upd) and stripping of sulfur takes place at two different potentials at polycrystalline Au substrates leading to two oxidative and two reductive peaks. However, sulfur upd consists of only one oxidative and reductive peak at single crystalline Au(111) substrates. Electrosorption valancy measurements and pH dependency showed that the upd of sulfur involved two-electron and one-step mechanism. The charge corresponding to one monolayer of sulfur was determined by cyclic voltammetry and chronocoulometry, indicating a 0.33 coverage. The chronoamperometric results at polycrystalline Au electrodes indicates that deposition takes place in a Langmuir-type mechanism, whereas the stripping of sulfur follows a two-dimensional nucleation and growth mechanism which is accompanied by Langmuir adsorption. Although the appearance of current transients, observed for the deposition of sulfur on Au(111), was similar to what seen for deposition on polycrystalline Au substrates, the stripping process was totally different from deposition, involving only a two-dimensional nucleation and growth mechanism, at pH 12. From an analysis of the desorption current transient, we describe the stripping mechanism as instantaneous. Chronoamperometry experiments suggest that sulfur is first adsorbed on to a Au(111) surface randomly, then reorganizes itself to form a well-ordered structure, and finally strips off in a two-dimensional nucleation and growth mechanism.

A Novel Reaction of Metal Sulphides with the Mixed Non-aqueous System Dimethyl Sulphoxide-Sulphur Dioxide

Harrison, W. David,Gill, J. Bernard,Goodall, David C.

, p. 728 - 729 (1988)

Several synthetic and naturally occuring metal sulphides react with the system dimethyl sulphoxide-sulphur dioxide to give metal hydrogen sulphates or sulphates, in contrast with the reaction of sulphides with aqueous sulphur dioxide, which yields mainly thiosulphate.

The claus reaction: VI. The reaction mechanism over a Sn-Mo oxide catalyst

Davydov,Shepot'Ko

, p. 260 - 267 (2003)

Based on the comparison of reactant conversions in pulses on the stationary surface of the catalyst, the Claus reaction is found to occur via a stepwise mechanism. The nature of interaction of the SO2 and H2S molecules with the catalyst surface was studied by FTIR and UV-VIS spectroscopy and the reactivity of the adsorbed species was studied in situ. The intermediate adsorbed reactant species are determined. A scheme of the reaction mechanism over the Sn-Mo oxide catalyst is discussed.

Bellissent, R.,Descotes, L.,Boue, F.

, (1990)

Thermal and Photochemical Reactions of Sulfhydryl Radicals. Implications for Colloid Photocorrosion

Mills, G.,Schmidt, K. H.,Matheson, M. S.,Meisel, D.

, p. 1590 - 1596 (1987)

Several thermal and photochemical reactions of sulfhydryl raducals, either in their monomeric (S radical/HS radical) or dimeric (H2S2(1-) radical) form, have been studied by using the pulse radiolysis technique.The dimer form is shown to react with O2 and methylviologen (MV(2+)).The tautomer reacts with O2 to produce a transient addition product, SO2(1-) radical, which further proceeds to give superoxide radicals.The dimer reacts slower with O2 by elecron transfer.The reaction of S(1-) radical/SH radical with MV(2+) yields several addition products which strongly absorb at λmax = 485 nm.These are partially converted to MV(1+) radical, either through a unimolecular process or by reaction with another MV(2+) molecule.Implications of these observation for the photocorrosion of semiconductor colloidal sulfides are discussed.In particular, the possibility of reduction processes by surface-adsorbed sulfydryl radicals, produced by hole trapping at the colloid surface, is considered.

Gibbs, W.

, p. 387 - 402 (1864)

A new dinuclear molybdenum(V)-sulfur complex containing citrate ligand: Synthesis and characterization of K2.5Na2NH4[Mo2O2S 2(cit)2].5H2O

Xing,Xu,Sun,Li,Xing,Lin,Jia

, p. 745 - 756 (1998)

The complex, K2.5Na2NH4[Mo2O2S 2(cit)2]-5H2O (1), was obtained by crystallization from a solution of (NH4)2MoS4, potassium citrate (K3cit) and hydroxyl sodium in methanol and water under an atmosphere of pure nitrogen at ambient temperature. The crystals are triclinic, space group PI, a = 7.376 (3)A, b = 14.620 (2) A, c = 14.661 (1) A, a = 71.10 (1)°, β= 81.77 (1)°, γ = 78.27(2)°, R = 0.0584 for 2545 observed (I > 2σ (I)) reflections. Single crystal structure analysis reveals that citrate ligand coordinated to molybdenum atom through two carboxylato oxygens and one deprotonated hydroxyl oxygen together with two bridging sulfur atoms and a terminal oxygen atom completes distorted coordination octahedron around each molybdenum atom. Principal dimensions are Mo = O1, 1.707 A (av); Mo-Sb, 2.341 A (av); Mo-O(hydrcoxyl), 2.021 A (av); Mo-O(α-carbaxyl), 2.1290 A (av) and Mo-O(β-carbaxyl), 2.268(av) A. IR spectrum is in agreement with the structure. Elsevier,.

Murthy, A. R. V.

, p. 388 - 401 (1952)

Multiphoton photofragmentation of SO2 at 248 nm

Wilson, M. W.,Rothschild, M.,Muller, D. F.,Rhodes, C. K.

, p. 1837 - 1841 (1982)

Sequential two-photon photoexcitation of SO2 at 248 nm is found to lead to a number of primary fragments including S(3P) and SO(X 3Σ-).Further excitation of some of these photoproducts was also observed, occurring by both linear and two-quantum mechanisms.The resulting molecular X3P 3S vacuum ultraviolet emission from S atoms were detected and an analysis of the energy flow patterns was made.

Structural determination of the S-passivated InP(100)-(1x1) surface by dynamical low-energy electron-diffraction analysis

Warren, O. L.,Anderson, G. W.,Hanf, M. C.,Griffiths, K.,Norton, P. R.

, (1995)

We have determined the optimum geometry of the S-passivated InP(100)-(1x1) surface by dynamical low-energy electron-diffraction analysis. S atoms bond to In by occupying the bridge site that continues the zinc-blendestacking sequence of the substrate. Oth

Measurement of reaction enthalpy during pressure oxidation of sulphide minerals

Bylina,Trevani,Mojumdar,Tremaine,Papangelakis

, p. 117 - 124 (2009)

A calorimetric method for determining the enthalpy of the aqueous oxidation of sulfide minerals at high temperatures and oxygen pressures has been developed and evaluated under conditions relevant to industrial pressure oxidation operations. This informat

Skrabal

, p. 107 - 107 (1924)

The Interconversion of heptanitrosyltri-μ3-thioxotetraferrate(1-) and pentacyanonitrosylferrate(2-)

Glidewell, Christopher,McGinnis, Joseph

, p. L171-L172 (1982)

-

High temperature H2S selective oxidation on a copper-substituted hexaaluminate catalyst: A facile process for treating low concentration acid gas

Hao, Zhengping,Jiang, Guoxia,Li, Ganggang,Xu, Xin,Zhang, Fenglian

supporting information, (2021/09/22)

H2S selective catalytic oxidation technology is a prospective way for the treatment of low concentration acid gas with simple process operation and low investment. However, undesirable results such as large formation of SO2 and catalyst deactivation inevitably occur, due to the temperature rise of fixed reaction bed caused by the exothermic reaction. Catalyst with high activity in wide operating temperature window, especially in high temperature range, is urgently needed. In this paper, a series of copper-substituted hexaaluminate catalysts (LaCux, x = 0, 0.5, 1, 1.5, 2, 2.5) were prepared and investigated for the H2S selective oxidation reaction at high temperature conditions (300-550°C). The LaCu1 catalyst exhibited excellent catalytic performance and great stability, which was attributed to the best reductive properties and proper pore structure. Besides, two facile deep processing paths were proposed to eliminate the remaining H2S and SO2 in the tail gas.

In Situ Modulation of A-Site Vacancies in LaMnO3.15 Perovskite for Surface Lattice Oxygen Activation and Boosted Redox Reactions

Chen, Jianjun,Ding, Yun,He, Minghua,Li, Junhua,Liu, Haiyan,Liu, Jun,Liu, Xiaoqing,Liu, Yuefeng,Mi, Jinxing,Shi, Jianqiang,Shi, Lin,Wang, Zisha,Wu, Zhong-Shuai,Xiong, Shangchao,Zhang, Qinfang

supporting information, p. 26747 - 26754 (2021/11/17)

Modulation of A-site defects is crucial to the redox reactions on ABO3 perovskites for both clean air application and electrochemical energy storage. Herein we report a scalable one-pot strategy for in situ regulation of La vacancies (VLa) in LaMnO3.15 by simply introducing urea in the traditional citrate process, and further reveal the fundamental relationship between VLa creation and surface lattice oxygen (Olatt) activation. The underlying mechanism is shortened Mn?O bonds, decreased orbital ordering, promoted MnO6 bending vibration and weakened Jahn–Teller distortion, ultimately realizing enhanced Mn-3d and O-2p orbital hybridization. The LaMnO3.15 with optimized VLa exhibits order of magnitude increase in toluene oxidation and ca. 0.05 V versus RHE (reversible hydrogen electrode) increase of half-wave potential in oxygen reduction reaction (ORR). The reported strategy can benefit the development of novel defect-meditated perovskites in both heterocatalysis and electrocatalysis.

Synergistic effect of Bi-doped exfoliated MoS2 nanosheets on their bactericidal and dye degradation potential

Qumar,Ikram,Imran,Haider,Ul-Hamid,Haider,Riaz,Ali

, p. 5362 - 5377 (2020/05/08)

Nanosheets incorporated with biological reducing agents are widely used to minimize the toxic effects of chemicals. Biologically amalgamated metal oxide nanomaterials have crucial importance in nanotechnology. In this study, bare and bismuth (Bi)-doped molybdenum disulfide (MoS2) nanosheets were synthesized via a hydrothermal method. Different Bi weight ratios of 2.5, 5, 7.5 and 10% were incorporated in a fixed amount of MoS2 to evaluate its catalytic and antimicrobial activities. Doped nanosheets were characterized using XRD, FTIR and UV-vis spectroscopy, FESEM, HRTEM, Raman, PL, DSC/TGA, EDX, XRF and XPS analysis. The XRD spectra confirmed that the doped nanosheets exhibit a hexagonal structure and their crystallite size increases gradually upon doping. The morphology and interlayer d-spacing of doped MoS2 were determined by FESEM and HRTEM. The presence of functional groups in the doped nanosheets was confirmed using FTIR, PL and Raman analysis. The absorption intensity increased and the corresponding measured band gap energy decreased with doping. The thermal stability and weight loss behaviour of the prepared samples were studied using DSC/TGA. The doped MoS2 nanosheets showed a higher catalytic potential compared to undoped MoS2. The doped Bi nanosheets exhibited higher antimicrobial activity against Gram-positive Staphylococcus aureus (S. aureus) and Gram-negative Escherichia coli (E. coli) at different concentrations of Bi (0.075 and 0.1), showing a tendency to counter the emerging drug resistance against pathogenic bacterial diseases. Consequently, significant inhibition zones were recorded against (MDR) S. aureus ranging from 2.25 to 3.3 mm and 3.25 to 5.05 mm at low and high concentrations of doped-Bi nanosheets and against Gram-negative E. coli ranging from 1 to 1.45 mm at high concentrations. In conclusion, the Bi-doped MoS2 nanocomposite has exhibited significant potential for use in industrial dye degradation applications. Its antibacterial properties can also mitigate health risks associated with the presence of several well-known pathogens in the environment.

Gas-Phase Photochemical Overall H2S Splitting by UV Light Irradiation

Baldovi, Herme G.,Albero, Josep,Ferrer, Belen,Mateo, Diego,Alvaro, Mercedes,García, Hermenegildo

, p. 1996 - 2000 (2017/05/16)

Splitting of hydrogen sulfide is achieved to produce value-added chemicals. Upon irradiation at 254 nm in the gas phase and in the absence of catalysts or photocatalysts at near room temperature, H2S splits into stoichiometric amounts of H2 and S with a quantum efficiency close to 50 %. No influence of the presence of CH4 and CO2 (typical components in natural gas and biogas in which H2S is an unwanted component) on the efficiency of overall H2S splitting was observed. A mechanism for the H2 and S formation is proposed.

Physicochemical studies on the desulfurization process of organosulfur compounds occur in crude oil by metallo-complexation method

Alhadhrami,Al-Ghamry, Mosad A.,Atta, Aly H.,El-Shenawy, Ahmed I.,Refat, Moamen S.,Al-Omar, Mohamed A.,Naglah, Ahmed M.

, p. 94 - 97 (2017/02/13)

All over the world researchers in accelerating to development the new and modern methods of desulfurization process to overcome the presence of residual sulfur compounds in the crude oil, which has harmful effects and undesirable. Out of these important r

Process route upstream and downstream products

Process route

thionyl chloride
7719-09-7

thionyl chloride

potassium iodide
7681-11-0

potassium iodide

hydrogenchloride
7647-01-0,15364-23-5

hydrogenchloride

sulfuric acid
7664-93-9

sulfuric acid

potassium chloride

potassium chloride

hydrogen iodide
10034-85-2

hydrogen iodide

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
With water; In tetrachloromethane; water; addn. of SOCl2 (in CCl4) to aq. KI/I2; shaking; product ratio depends on I2 concn.;;
With H2O; In tetrachloromethane; water; addn. of SOCl2 (in CCl4) to aq. KI/I2; shaking; product ratio depends on I2 concn.;;
Conditions
Conditions Yield
In water; with dild. and cooled soln.;
0%
arsenic

arsenic

Iodine monochloride
7790-99-0

Iodine monochloride

cadmium(II) sulphide

cadmium(II) sulphide

disulfur dichloride
10025-67-9

disulfur dichloride

sulfur
7704-34-9

sulfur

cadmium(II) iodide
7790-80-9

cadmium(II) iodide

Conditions
Conditions Yield
carnallite

carnallite

magnesium sulfide

magnesium sulfide

disulfur dichloride
10025-67-9

disulfur dichloride

sulfur
7704-34-9

sulfur

magnesium
7439-95-4

magnesium

Conditions
Conditions Yield
Electrolysis;
magnesium sulfide

magnesium sulfide

magnesium chloride
7786-30-3

magnesium chloride

disulfur dichloride
10025-67-9

disulfur dichloride

sulfur
7704-34-9

sulfur

magnesium
7439-95-4

magnesium

Conditions
Conditions Yield
Electrolysis;
trichlorothiophosphine
3982-91-0

trichlorothiophosphine

sulfur trioxide
7446-11-9

sulfur trioxide

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
In tetrachloromethane; room temp.;
In tetrachloromethane; room temp.;
disulfur dichloride
10025-67-9

disulfur dichloride

antimony
7440-36-0

antimony

antimony(III) chloride
10025-91-9

antimony(III) chloride

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
In neat (no solvent); room temp.;;
In neat (no solvent); reaction of starting material with precipitation of S;;
In neat (no solvent); room temp.;;
disulfur dichloride
10025-67-9

disulfur dichloride

silicon
7440-21-3

silicon

tetrachlorosilane
10026-04-7,53609-55-5

tetrachlorosilane

silicon thiochloride
13492-46-1

silicon thiochloride

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
With chlorine; In neat (no solvent); heating under a S2Cl2 containing Cl2 stream at red heat;;
With chlorine; In neat (no solvent); heating under a S2Cl2 containing Cl2 stream at red heat;;
With Cl2; In neat (no solvent); heating under a S2Cl2 containing Cl2 stream at red heat;;
disulfur dichloride
10025-67-9

disulfur dichloride

silicon
7440-21-3

silicon

tetrachlorosilane
10026-04-7,53609-55-5

tetrachlorosilane

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
In neat (no solvent); heating at a temperature below red heat;;
In neat (no solvent); heating at a temperature below red heat;;
tellurium
14683-12-6

tellurium

thionyl chloride
7719-09-7

thionyl chloride

tellurium tetrachloride
10026-07-0

tellurium tetrachloride

sulfur
7704-34-9

sulfur

Conditions
Conditions Yield
In neat (no solvent);
In neat (no solvent);

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  • Contact Tel:86-29-86107037-8015
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  • Country:China (Mainland)
  • Hangzhou Dingyan Chem Co., Ltd
  • Business Type:Manufacturers
  • Contact Tel:86-571-86465881,86-571-87157530,86-571-88025800
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