Thermal behaviour of CuS (covellite) obtained from copper–thiosulfate system

Simonescu, Claudia Maria; Teodorescu, V. S.; Carp, Oana; Patron, Luminiţa; Căpăţînă, Camelia

doi:10.1007/s10973-006-8079-z

Cited by 41 publications

(23 citation statements)

References 30 publications

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“…It was well known that thermal decomposition of CuS in free air is a process of several steps, and depending on experimental circumstances (temperature, environment). In this process different copper sulfides (Cu 1.8 S and/or Cu 2 S), copper oxides (Cu 2 O and CuO), copper sulfates (Cu 2 SO 4 , CuSO 4 ), copper oxy-sulfates (CuOÁCuSO 4 ) were formed (Godočíková et al 2006;Simonescu et al 2007). The thermal stability and decomposition curves (DSC, TGA) of the copper sulfides (CuS) nanospheres are depicted in (Fig.…”

Section: Thermal Behavior Of Cus Nanomaterialsmentioning

confidence: 99%

A simple microwave assists aqueous route to synthesis CuS nanoparticles and further aggregation to spherical shape

et al. 2012

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The aggregation of CuS nanoparticles during synthesis by a hassle-free aqueous route under microwave irradiation gave remarkable spherical shape, utilizing Cu(CH 3 COO) 2 ÁH 2 O as the source of copper and Na 2 S 2 O 3 Á5H 2 O, as sulfur source; these materials were used without assistance of any surfactant or template. An X-ray powder diffraction pattern proved that the product is hexagonal CuS phase. The morphologies of the product were observed by scanning electron microscopy. Thermal behavior, different solid state, and chemical conversion in CuS with respect to temperature were studied by DSC/TGA, which confirmed the thermal oxidation of CuS and its conversion into CuO then to Cu 2 O.

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Section: Thermal Behavior Of Cus Nanomaterialsmentioning

confidence: 99%

A simple microwave assists aqueous route to synthesis CuS nanoparticles and further aggregation to spherical shape

et al. 2012

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“…Because of that particular attention must be given to their thermal properties. Oxidation processes of natural and precipitated covellite and chalcocite are well established [22][23][24][25][26][27]. It led to the formation of various copper sulfates and eventually oxides.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of anisotropic Cu2−xS-based nanostructures by thermal oxidation

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et al. 2019

J Therm Anal Calorim

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Flower-like copper sulfides nanostructures were synthesized via the solvothermal route. The structural, optical and electrochemical properties of the synthesized materials were characterized by means of X-ray diffraction (XRD), scanning electron microscopy, ultraviolet-visible spectrometry and Fourier transform infrared spectroscopy (FTIR). Thermal behavior of the obtained flower-like materials was analyzed by TG, XRD and FTIR in situ measurements, over the temperature range of 25-800°C. It was found that both shape and phase composition remain stable until the temperature reaches 200°C. Phase transformation mechanism was discussed. During annealing, mixture of CuS and Cu 1.8 S is converted to copper sulfide hydroxides (200-500°C) and further to CuO (700°C and higher). Nevertheless, hierarchically porous structure is stable only to 200°C. Applying higher temperatures affects the solubility of the material and inflicts structural damage, resulting in the formation of dense oval particles with size of 20 to 200 nm.

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“…In the literature, most studies have concentrated on the effect of different factors such as the molar ratio, solution and substrate temperature, ambient atmosphere, annealing temperature, deposition time and the influence of the substrate on the properties of the chalcogenide thin films [13][14][15][16][17]. Therefore, in this work, we are interested in the preparation and investigation of CuS thin films deposited by CBD from chalcogenide thin films and in studying the effect of the solution's pH value on its structural and optical properties.…”

Section: Introductionmentioning

confidence: 99%