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)°.
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.
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.
Anderson, C. T.
, p. 476 - 483 (1931)
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.
Nagard, N. Le,Katty, A.,Collin, G.,Gorochov, O.,Willig, A.
, p. 267 - 278 (1979)
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.
Feigl
, p. 32 - 43 (1927)
Sauer, E.,Steiner, D.
, p. 41 - 46 (1935)
Mokrushin, S. G.,Dem'yanova, N. M.
, p. 261 - 267 (1935)
Svensson, B.
, p. 120 - 128 (1932)
Compounds with layered structures in the systems CuGa5S8/CuIn5S8 and AgGa5S8/AgIn5S8
Haeuseler,Elitok,Memo,Arzani
, p. 1204 - 1208 (2001)
The title systems have been investigated by single crystal and powder X-ray diffraction methods on quenched samples. In the system AgGaxIn5-xS8 spinel type phases are formed up to x A compound crystallising with a hexagonal layered structure is obtained for 2 a single crystal of composition AgGa3In2S8: space group P63mc, Z = 2, a = 380.80 and c = 3076.4 pm. The structure is isotypic to the Zn2In2S5 (II a) type. The sample AgGa4InS8 crystallises in a Wurtzite like structure with a = 377.25 and c = 616.1 pm. In the system CuGaxIn5-xS8 a new compound with layered structure has been detected for 1 ≤ x ≤ 2 which crystallises hexagonally with a = 380.28 and c = 3073.4 pm (x = 2). For the spinel CuIn5S8 an exchange of In by Ga is not detected. Wiley-VCH Verlag GmbH, 2001.
Controllable synthesis of Cu-based nanocrystals in ODA solvent
Wang, Dingsheng,Li, Yadong
, p. 3604 - 3606 (2011)
We exploited a solution-based route for preparation of Cu, Cu2O, Cu3N, and Cu2S nanocrystals, that is, direct thermal decomposition of copper salts (Cu(NO3)2, CuSO4) in octadecylamine (ODA) solvent, which is a novel and ingenious chemical process.
Hahn
, p. 134 - 137 (1924)
Achievement of extra-high thermoelectric performance in doped copper (I) sulfide
Li, Guihui,Lou, Shiyun,Nkemeni, Darrin Sime,Yang, Zhe,Zhou, Shaomin
, (2021)
The development of nontoxic and inexpensive thermoelectric copper (I) sulfide (Cu2S)-based materials could enable an increase in the application of thermoelectric materials in the domain of energy conversion. By using melt quenching, mechanical alloying and spark plasma sintering, we successfully prepared doped and undoped Cu2S with excellent thermoelectric properties. Owing to the increase of carrier concentration, the electrical conductivity of the dopants enhanced from 2.0 × 104 S/m to 1.0 × 105 S/m, with the highest value acquired for Mn doped Cu2S of about 1.0 × 105 S/m at 350 K. Besides, Cu1.8Sn0.1Mn0.1S, Cu1.9Mn0.1S, and Cu1.9Sn0.1S followed an increasing variation in Seebeck coefficient with final values of 325 μV K?1, 322 μV K?1, and 294 μV K?1 at 800 K, respectively. The maximum power factor of 3.24 mW m?1 K?2 is obtained for Cu1.9Mn0.1S at 650 K, which is about 40 times greater than undoped Cu2S (0.08 mW m?1 K?2). At the same time, a peak ZT of 1.63 is attained at 700 K for Cu1.9Mn0.1S, which is about 18 times enhanced over undoped Cu2S (0.09).
Mobile copper ions as heat carriers in polymorphous copper sulfide superionic conductors
Liang, Xin
, (2017)
Liquid-like mobile Cu+ ions are generally considered as phonon scatters in copper chalcogenide superionic conductors, but this is recently disproved by a neutron spectroscopy study on lattice dynamics of Cu2Se compound [Voneshen et al., Phys. Rev. Lett. 17, 118 (2017)]. In this work, we provide a different perspective by investigating the thermal transport of three transformable polymorphs of Cu2S compounds with varying Cu+ content. We show that the disordered and mobile Cu+ ions are not the primary factor for suppressing the heat transport. A notable dependence of thermal conductivity on Cu+ content is observed. By correlating the electrically deducted thermal conductivity with the ion motion behavior for β-Cu2S superionic phase, we reveal that these fast ionic species Cu+ are heat carriers instead, which make an appreciable contribution to thermal conduction.
The phase diagrams of M2X-SiX2 (M is Cu, Ag; X is S, Se)
Venkatraman, Mahadevan,Blachnik, Roger,Schlieper, Andreas
, p. 13 - 20 (1995)
The phase diagrams of Cu2S-SiS2, Ag2S-SiS2 and Ag2Se-SiSe2 were investigated by DTA and X-ray methods. The system Cu2S-SiS2 contains two compounds: Cu2SiS3 and Cu8SiS6. The compound Cu6Si2S7 does not exist. The phasediagram of Ag2S-SiS2 is characterized by the presence of two ternary co mpounds: Ag8SiS6 and Ag10Si3S11. The Ag2Se-SiSe2 system contains only Ag8SiSe6, which forms a eutectic on either side. The stability range and the X-ray diffraction data of the compounds are presented.
Formation of CuS submicrotubes with quadrate cross section
Yan,Huang,Jia,Luo
, p. 1360 - 1365 (2009)
CuS submicrotubes with quadrate cross section were synthesized by two simple steps: (i) preparation of copper-thiourea (Tu) complex; and (ii) subsequent reaction of the as-prepared complex with Na2S solution. Copper-Tu complex was characterized
Fabrication and SERS properties of Ag/Cu2S composite micro-nanostructures over Cu foil
Song, Wei,Wang, Jinjie,Mao, Zhu,Xu, Weiqing,Zhao, Bing
, p. 1247 - 1250 (2011)
A new kind of Ag/Cu2S composite micro/nanostructures has been prepared via a convenient galvanic reduction method. SEM images of these micro/nanostructures showed that Ag nanoparticles with the size of around 50-100 nm were well deposited on the surface of Cu2S micro/nanostructures. The SEM images also indicated that the Ag nanoparticles were preferentially grown on the big polygonal Cu2S microstructures, which could be explained by a localization of the electrons on the surface of the polygonal Cu2S microstructures after the electron transfer step. Owing to the introduction of Ag nanoparticles on the surface of Cu2S micro/nanostructures, the resulting Ag/Cu2S composite micro-nanostructures could be used as a versatile substrate for surface enhanced Raman scattering.
The phase equilibria in the quasi-ternary Cu2S-CdS-SnS2 system
Piskach,Parasyuk,Olekseyuk
, p. 142 - 152 (1998)
The phase equilibria in the quasi-ternary system Cu2S-CdS-SnS2 has been investigated using differential thermal, X-ray phase, microstructural and energy-dispersive X-ray analyses. The projection of the liquid surface and the isotherm
Baskerville, C.
, p. 942 - 947 (1896)
Synthesis, crystal structure, and properties of novel perovskite oxychalcogenides, Ca2CuFeO3Ch (Ch = S, Se)
Charkin,Sadakov,Omel'Yanovskii,Kazakov
, p. 2012 - 2016 (2010)
Two new perovskite oxychalcogenides, Ca2CuFeO3S and Ca2CuFeO3Se, have been synthesized in evacuated quartz tubes. They crystallize in P4/nmm space group with lattice parameters a = 3.8271(1), c = 14.9485(2) and a = 3.8605(1), c = 15.3030(2) for Ca 2CuFeO3S and Ca2CuFeO3Se, respectively. They appear to be the first layered chalcogenide perovskites involving calcium and are structural analogs of the corresponding Sr and Ba compounds. The new compounds exhibit semiconducting properties with energy gap decreasing from the oxysulfide to the oxyselenide. Possibility of introducing Ca2+ into structures of known layered oxychalcogenides and oxypnictides is discussed.
Ultrahigh Thermoelectric Performance in Mosaic Crystals
He, Ying,Lu, Ping,Shi, Xun,Xu, Fangfang,Zhang, Tiansong,Snyder, Gerald Jeffrey,Uher, Ctirad,Chen, Lidong
, p. 3639 - 3644 (2015)
Successful research strategies to enhance the dimensionless figure of merit zT above 2 rely on either bulk nanomaterials or on single crystals. A new physical mechanism of nanoscale mosaicity is shown that goes beyond the approaches in single crystals or conventional nanomaterials. A zT value of 2.1 at 1000 K in bulk nanomaterials is achieved.
Photoelectrochemistry of pure and core/sheath nanowire arrays of Cu 2S directly grown on copper electrodes
Tang, Shangfeng,Wen, Xiaogang,Zhang, Weixin,Yang, Shihe
, p. G220-G226 (2005)
Photoelectrochemistry (PEC) of straight and isolated Cu2S nanowires arrayed on a copper foil is studied. A cathodic photocurrent is observed, which increases with the increasing negative bias of the film electrode, conforming to the p-type semiconducting nature of Cu2S. PEC studies on the core/sheath nanowires of Cu2S (Cu2S nanowires coaled with other nanoparticles such as CdS, polypyrrole, and Au) have revealed distinctly different characteristics. Cu2S/CdS nanowires exhibit a slightly higher photocurrent response due to the charge transfer between the p-type Cu2S core and n-type CdS sheath, whereas the photocurrent response obtained for Cu2S/PPy nanowires is generally an order of magnitude smaller than that for pure Cu2S nanowires under the same bias voltage. For Cu2S/Au nanowires, however. Au nanoparticles can readily accept the photogenerated electrons from the conduction band of Cu2S; this redirects the electron transfer pathway and results in the anodic photocurrent response. On the basis of these findings, different photocurrent generation mechanisms are proposed.
Divers, E.,Shimidzu, T.
, p. 636 - 639 (1885)
Mixed-metal thiophosphate CuCd3PS6: An infrared nonlinear optical material activated by its three-in-one tetrahedra-stacking architecture
Guo, Yangwu,Li, Chunxiao,Li, Zhuang,Lin, Zheshuai,Wu, Yicheng,Xing, Wenhao,Yao, Jiyong,Zhang, Shengzi
supporting information, p. 5020 - 5024 (2020/04/28)
Novel mixed-metal thiophosphate CuCd3PS6 has been firstly discovered and fully characterized. Careful experimental and theoretical investigations demonstrate that CuCd3PS6 is a benign infrared nonlinear optical material with a moderate second harmonic generation response of 0.9 × AgGaS2 at 41-74 μm, a large laser damage threshold of 4.1 × AgGaS2, a wide band gap of 2.24 eV and a low melting point of 603 °C. Moreover, first principles calculations indicate that CuCd3PS6's intriguing nonlinear optical performance is activated by its three-in-one tetrahedra-stacking architecture.
