22205-45-4Relevant articles and documents
Synthesis and the crystal structure of CeCuS2
Komatsuzaki,Takase,Smura,Takahashi,Takano,Sekizawa,Clarke
, p. 586 - 588 (2006)
Single phase of CeCuS2 has been prepared by the mixture of CeO2 and Cu2S at 1000 ° C in CS2/Ar atmosphere. All X-ray diffraction peaks of CeCuS2 are indexed on the basis of the monoclinic system (space group: P21c) the same as LaCuS 2 and NdCuS2. The lattice parameters obtained by Rietveld analysis are a=0.6573(1) nm, b=0.7256(1) nm, c=0.6875(1) nm, and β=98.566(1)°.
Growth of bi-partite and metallic copper whiskers
Jha,Grieveson
, p. 2299 - 2311 (1990)
Conditions for the growth of metallic copper and bi-partite whiskers of copper and cuprous sulphide are described with particular emphasis on the physical chemistry of the growth process. The mechanism of growth is explained and the significance of phase
CuS nanostructures prepared by a hydrothermal method
Huang, Qing-Li,Chen, Hu,Zhang, Yong Cai,Le Wu, Chang
, p. 6382 - 6387 (2011)
Without using any surfactant or template, novel CuS three-dimensional (3D) structures consisting of nanosheets were successfully synthesized via a convenient one-step hydrothermal approach. X-ray diffraction pattern showed that the as-prepared product was pure hexagonal phase CuS. Scanning electron microscopy and high-resolution transmission electron microscopy images revealed that the as-prepared product comprised 3D microspheres (about 1-3 μm in diameter), which were further constructed with randomly oriented, single-crystalline CuS nanosheets (about 20 nm in thickness). The UV-vis absorption spectrum of the as-synthesized CuS 3D microspheres displayed an optical absorption minimum near 672 nm. Besides, the thermal stability of the as-synthesized CuS 3D microspheres was also studied.
Phosphine stabilized copper(i) complexes of dithiocarbamates and xanthates and their decomposition pathways
Afzaal, Mohammad,Rosenberg, Chico L.,Malik, Mohammad A.,White, Andrew J. P.,O'Brien, Paul
, p. 2773 - 2780 (2011)
Phosphine stabilized compounds [Cu(i)(S2CNEt2)PR 3]2 (1-3) (R = OMe, Me and Et, respectively) and [Cu(i)(S2COEt)PR3]2 (4, 5), (R = OMe, and Me, respectively) have been prepared and characterised. The structures of compounds (1-3) were determined by X-ray single crystallography. The structures of all three compounds are based on centro-symmetric dimers which crystallise in the monoclinic space group P21/n with two [Cu(i)(S2CNEt 2)PR3]2 molecules per unit cell. The thermal decomposition of selected complexes was investigated by thermogravimetric, differential scanning calorimetry and gas chromatography with mass spectroscopy to understand the possible decomposition pathways.
Synergistic Effect of Chemical Substitution and Insertion on the Thermoelectric Performance of Cu26V2Ge6S32Colusite
Shimizu, Yuta,Suekuni, Koichiro,Saito, Hikaru,Lemoine, Pierric,Guilmeau, Emmanuel,Raveau, Bernard,Chetty, Raju,Ohta, Michihiro,Takabatake, Toshiro,Ohtaki, Michitaka
, p. 11364 - 11373 (2021)
Copper-based sulfides are promising materials for thermoelectric applications, which can convert waste heat into electricity. This study reports the enhanced thermoelectric performance of Cu26V2Ge6S32 colusite via substitution of antimony (Sb) for germanium (Ge) and introduction of copper (Cu) as an interstitial atom. The crystal structure of the solid solutions and Cu-rich compounds were analyzed by powder X-ray diffraction and scanning transmission electron microscopy. Both chemical approaches decrease the hole carrier concentration, which leads to a reduction in the electronic thermal conductivity while keeping the thermoelectric power factor at a high value. Furthermore, the interstitial Cu atoms act as phonon scatterers, thereby decreasing the lattice thermal conductivity. The combined effects increase the dimensionless thermoelectric figure of merit ZT from 0.3 (Cu26V2Ge6S32) to 0.8 (Cu29V2Ge5SbS32) at 673 K.
Sonochemical preparation of copper sulfides with different phases in aqueous solutions
Kristl, Matja?,Hojnik, Nu?a,Gyergyek, Sa?o,Drofenik, Miha
, p. 1184 - 1188 (2013)
There is a growing interest in the synthesis of nanostructured copper sulfides due to their ability to form compounds with various stoichiometries. We report a sonochemical route for the preparation of copper sulfides with different compositions in aqueous solutions, using different, general and convenient copper sources such as copper acetate, copper hydroxide or basic copper carbonate and thiourea or thioacetamide as sulfur precursors under ambient air. Phase analysis, purity and morphology of the products were studied by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and thermogravimetric analysis (TGA). The results revealed that nanoparticles of covellite, CuS, with crystallite sizes between 7 and 18 nm can be obtained by using different precursors and complexing agents and that chalcocite, Cu 2S, can also be prepared sonochemically.
Field emission from crystalline copper sulphide nanowire arrays
Chen, Jun,Deng,Xu,Wang, Suhua,Wen, Xiaogang,Yang, Shihe,Yang, Chunlei,Wang, Jiannong,Ge, Weikun
, p. 3620 - 3622 (2002)
Straight crystalline copper sulphide (Cu2S) nanowire arrays have been grown by using a simple gas-solid reaction at room temperature. These were demonstrated to exhibit semiconductor properties. Field emission was observed at a field of ～6MV/m, and its current-field characteristics deviate from Fowler-Nordheim theory, i.e., showing a nonlinear Fowler-Nordheim plot. The uniform emission from the whole arrays was observed using transparent anode technique, and their variation with applied field was recorded. The emission from individual nanowires was also studied using a field emission microscope, and was found to consist of a number of spatially resolved diffuse spots. Finally, stable emission current at different levels and over time was recorded. These findings indicate that semiconductor nanowires as cold cathode have a potential future, worthy of further comprehensive investigation. The technical importance of using semiconductor nanowires as cold cathode emitter is given.
Effect of Precursor Mixture Composition on the Phase Composition and Electrical Transport Properties of Cu1.85ZnSnS4 and Cu1.5Zn1.15Sn0.85S4 Kesterite Solid Solutions Prepared in Molten KI
Gapanovich,Agapkin,Odin,Rakitin,Sedlovets,Kolesnikova,Novikov
, (2018)
We have studied the effect of precursor mixture composition on the phase composition and electrical transport properties of Cu1.85ZnSnS4 and Cu1.5Zn1.15Sn0.85S4 solid solutions with the kes
Hydrothermal synthesis of transition-metal sulfide dendrites or microspheres with functional imidazolium salt
Li, Kangfeng,Wang, Qiaojian,Cheng, Xianyi,Lv, Tianxi,Ying, Taokai
, p. L31-L35 (2010)
A series of transition-metal sulfide (PbS, CdS, ZnS, CoS, Cu2S) compounds were successfully synthesized through a facile hydrothermal method using 1-butyl-3-methlyimidazole thiocyanate ([BMIM][SCN]) as both sulfur source and capping ligand. The resultant products were characterized by X-ray powder diffraction (XRD) measurements in order to determine the crystalline phase of the products. The structural and morphological features of the samples were investigated by scanning electron microscopy (SEM), which showed that the morphologies of PbS and CdS were novel hierarchical dendrites, but rough exterior microspheres of ZnS, CoS and Cu2S. A possible reaction process was simply discussed in the end.
Thermal stability and kinetic studies of new dinuclear copper(II) complexes with octaazamacrocyclic and multidonor bidentate ligands
Sovilj, Sofija P.,Babi?-Samard?ija, Ksenija,Mini?, Dragica M.
, p. 29 - 35 (2001)
The thermal properties of four copper(II) complexes with N,N′,N″,N?-tetrakis(2-pyridylmethyl)-1,4,8, 11-tetraazacyclote-tradecane (tpmc) and several bidentate ligands N,S (thiosemicarbazide and thiourea) or N,O donors (semicarbazide and urea), of the general formula [Cu2(X)tpmc](ClO4)4, have been investigated by thermogravimetry (TG) and differential scanning calorimetry (DSC). The thermal stability order can be recognized for the examined complexes, depending on coordinated bidentate bridging N,S or N,O ligand. Kinetic data demonstrated first-order thermal decomposition. A plausible mechanism has been proposed which explains the major products of the degradation.
