Optical, photocatalytic properties of novel CuS nanoplate‐based architectures synthesised by a solvothermal route

Abstract

CuS architectures were successfully prepared by a simple solvothermal route without any surfactant, in which copper nitrate trihydrate and element sulfur were used as reactants. The products were characterized by X-ray diffraction, field emission scanning electron microscopy, and transmission electron microscopy. The optical properties of CuS architectres were investigated by Raman spectrometer, ultraviolet-visible spectroscopy, and fluorescence spectrophotometer. The results showed that the CuS architectures were hexagonal-structured phase and composed of intersectional nanoplates. UV-Vis absorption peaks of CuS architectures showed large blue shifts and PL spectrum exhibited a strong blue emission and a weak green emission. Photocatalytic activity of the CuS architectures was evaluated by measuring the decomposition rate of methylene blue solution under solar light. The CuS architectures show good photocatalytic activity. The effects of the molar ratio of Cu:S and the growth time on the synthesis of CuS crystalline were discussed and the growth mechanism of CuS nanoplate-based architectures was also proposed.

Preparation by Solvothermal Synthesis, Growth Mechanism, and Photocatalytic Performance of CuS Nanopowders

“…[57] In addition, the free NO 3ions preferentially absorb on the primary nanoplates and lead to a selective solubilization and recrystallization of CuS. However samples b, c, d, and e exhibit strong photocatalytic activity, especially samples b, c, and d, which can degrade more than 95 % of the initial RhB dye under identical conditions and show significantly superior performances to other reported CuS samples [41,59,60] and the commercial P25 photocatalyst, [61][62][63] which could only reach a degradation rate of less than 80 % in 60 min. [58] At longer reaction times, the nanoplates protrude further, leading to the construction of hierarchical structures built of well-ordered and oriented nanoplates.…”

Synthesis of novel CuS with hierarchical structures and its application in lithium-ion batteries

“…Copper sulfide (CuS), as an important semiconductor material, exhibits many unusual physical and chemical properties and has great potential applications in numerous fields such as cathode material of lithium-ion batteries, solar controller and solar radiation absorber, nonlinear optical material, catalyst, super ionic material and superconductor at low temperature [1][2][3][4][5][6][7]. Since the particle sizes and shapes of materials affect their properties and potential applications, recently, various morphologies of copper sulfide have been synthesized, such as nanoparticles, nanowires, nanoplates, hollow spheres, snowflakes, especially some complex hierarchical micro-/nanostructures [8][9][10][11][12][13][14][15].…”

Generation of hydrogen under visible light irradiation with enhanced photocatalytic activity of Bi2WO6/Cu1.8Se for organic pollutants under Vis‐NIR light reign

“…The band at 310 cm −1 was attributed to the simultaneous motions of Bi 3+ and [WO 4 ] 2− . A very sharp peak at 260 cm −1 of Cu 1.8 Se could be assigned to the lattice vibrations . Moreover, there is an overlap and a broadening of the bands at 790 and 820 cm −1 in the Raman spectrum of sample S6 compared to the pure Bi 2 WO 6 , along with appreciable changes in the relative intensity of the Raman bands.…”