Growth of CuS Nanostructures by Hydrothermal Route and Its Optical Properties

Abstract

CuS nanostructures have been successfully synthesized by hydrothermal route using copper nitrate and sodium thiosulphate as copper and sulfur precursors. Investigations were done to probe the effect of cationic surfactant, namely, Cetyltrimethylammonium bromide (CTAB) on the morphology of the products. A further study has been done to know the effect of reaction time on the morphology of CuS nanostructures. The FE-SEM results showed that the CuS products synthesized in CTAB were hexagonal plates and the samples prepared without CTAB were nanoplate like morphology of sizes about 40–80 nm. Presence of nanoplate-like structure of size about 40–80 nm was observed for the sample without CTAB. The synthesized CuS nanostructures were characterized by X-ray diffraction (XRD), FE-SEM, DRS-UV-Vis spectroscopy, and FT-IR spectroscopy. A possible growth mechanism has been elucidated for the growth of CuS nanostructures.

Synthesis and characterization of a CuS–WO3 composite photocatalyst for enhanced visible light photocatalytic activity

“…In the FT-IR spectrum of pure CuS, the absorption peaks at 608 cm -1 and 1074 cm -1 are assigned to Cu-S stretching modes and bending modes of H-O-H of absorbed water molecules in sulfide products. 21 In the spectrum of WO 3 , the broad band at 793 cm -1 corresponds to the stretching vibration modes of O-W-O bonds. The absorption peaks at 1616 and 1469 cm -1 corresponds to the asymmetric and stretching vibration mode of CH 3 -N + bond of CTAB in the sample.…”

Band gap engineering of CuS nanoparticles for artificial photosynthesis

“…Saranya et al synthesized CuS nanoparticles by the hydrothermal route and analyzed their optical properties. They engineered the band gap of CuS to cover the range of 1.641-1.653 eV [10].…”

The effect of complexing agent on crystal growth, structure and properties of nanostructured Cu2−xS thin films

“…Cu 2Àx S as materi- 13 als, particularly in its thin film form, maintain transmittance in the 14 infrared, low reflectance (<10%) in the visible, and relatively high 15 reflectance (> 15%) in the near-infrared region, which are ideal 16 characteristics for solar energy adsorption [2]. Copper sulfide can 17 exist as seven solid phases with various stoichiometries, Cu 2Àx S, 18 (0 < x < 1), including Cu-rich Cu 2 S (chalcocide), Cu 1.97 S (djurleite), 19 Cu 1.8 S (digenite), Cu 1.75 S (anilite) Cu 1.12 S (yarrowite), Cu 1.06 S 20 (talnakhite) and CuS (covellite) [3,4].…”

“…The compositional controlling of copper sulfide 27 nanocrystals is an important way to tune the optoelectrical 28 properties of Cu 2Àx S-based materials [6]. So far, Cu x S nanomaterials 29 with different structures like nanorods, flakes, disks, spheres, wires, 30 platelets, tubules, nanoribbons, flower-like structures, and urchin-31 like structures have been successfully synthesized to investigate 32 their properties and to expand their applications [7][8][9][10][11][12][13]. Chen and 33 his colleagues synthesized uniform CuS nanotubes (NTs) with a 34 diameter of 220 nm with photocatalytic activity under visible light 35 [4].…”