Hierarchical Design of CuS Architectures for Visible Light Photocatalysis of 4-Chlorophenol

Abstract

Hydrothermal-assisted CuS hierarchical architectures were grown in the presence of anionic sulfur sources, and the investigation of their degradation efficiency for a pesticide 4-chlorophenol (4-CP) under visible light irradiation was carried out. The dissociation of S 2– from the sulfur compound governs the nucleation of CuS followed by a specific pattern of growth to produce different morphologies. The self-assembled covellite spherical CuS flower architecture assembles in the presence of thiourea and exhibits the highest photodegradation activity. The open architecture of ∼2.3 μm spherical CuS flowers consisting of a ∼100 nm thick sheet encompasses a comparatively high surface area and particle growth along the (110) plane that facilitates more active sites for catalytic activity enhancement. The catalyst loading for 4-CP degradation has been optimized, and a detailed trapping mechanism has been explored.

Effect of RF Power on the Properties of Sputtered-CuS Thin Films for Photovoltaic Applications

“…A number of studies have reported on the value and nature of the energy band gaps of covellite CuS thin films. The direct band gaps reported in the literature lie in the range from 2.05 to 2.58 eV [3,12,16,20]. The band gaps of CuS thin films prepared in this study also ranged from 2.47 to 2.68 eV.…”

“…Atomic vibration mode analysis can distinguish spatial variations and surface species in a sample composition, which is generally possible through Raman measurement [16]. Additional analysis of the structural properties of the CuS thin films was conducted by obtaining Raman spectra, and the results are shown in Figure 2.…”

“…For all CuS thin films grown using different power conditions, the preferred growth orientation for the (110) plane was observed, and the intensity of the primary diffraction peak increased as the power was increased from 40 to 100 W. The full width at half maximum (FWHM) of the diffraction peak for the (110) plane was 0.58 for 40 W, 0.58 for 60 W, 0.48 for 80 W, and 0.38 at 100 W, showing a decreasing trend. The grain size calculated by substitution into the Scherrer formula [15] revealed that grain size increased from 15.7 nm at 40 W to 23.9 nm at 100 W. Atomic vibration mode analysis can distinguish spatial variations and surface species in a sample composition, which is generally possible through Raman measurement [16]. Additional analysis of the structural properties of the CuS thin films was conducted by obtaining Raman spectra, and the results are shown in Figure 2.…”

In situ sulfuration synthesis of flexible PAN-CuS “flowering branch” heterostructures as recyclable catalysts for dye degradation

“…[17][18][19][20] Recently, copper suldes have attracted a great deal of attention owing to their widespread applications in solar cells, optical lters, photoelectric transformers, superconductors and sensors. [21][22][23] Particularly, covellite (CuS) has a strong p-type metallic character with the highest concentration of free carriers among copper sulde materials. 24 Many previous researchers have demonstrated that CuS has important applications for photocatalysis.…”

Template‐assisted Morphological Evolution of Cu2S and Cu2MoS4 from Octahedral Cu2O Crystals

“…21 The morphological evolutions of the Cu 2 S and Cu 2 MoS 4 products were investigated by reacting the octahedral Cu 2 O template with sodium molybdate and thioacetamide in ethylene glycol. [25][26][27][28] The S 2− ions in solution reacted at the surfaces of the octahedral Cu 2 O template to form thermodynamically stable Cu 2 S nanoparticles on these surfaces. The mole ratio of thioacetamide to sodium molybdate was fixed at 5.48.…”