Efficient degradation of methylene blue: A comparative study using hydrothermally synthesised SnS2, WS2 and VS2 nanostructures

Intermixing of MoS2 and WS2 photocatalysts toward methylene blue photodegradation

“…Generally, the photodegradation of organic pollutants is often driven by reactive agents, such as superoxide radicals, hydroxyl radicals, or photo-induced holes produced from either the conduction or valence bands [ 41 – 42 ]. The mechanism of the PD of MB under visible light excitation consists of several steps: Initially, the MB dye molecules are adsorbed onto the surface of the catalyst [ 20 ], then the illumination with energy greater than that of the bandgap will promote electrons (e − ) to the conduction band (CB), leaving holes (h + ) in the valence band (VB). Simultaneously, oxygen molecules on the surface of the catalyst capture the excited electrons (e − ), leading to the formation of superoxide anions (O 2 − ) [ 43 ].…”

“…Furthermore, TMD materials are known to possess favorable electrical conductivity, which allows them to serve as sites for trapping photogenerated charges. This, in turn, facilitates the collection of charge carriers [ 18 ] leading to interesting photodegradation properties [ 19 – 20 ]. During the photochemical reaction process, the light excitation induces the generation of electron–hole pairs (EHPs) [ 21 ].…”

Photocatalytic and Oxygen Evolution Reaction (OER) of Novel Supercritical Fluid Synthesized Nanobiocomposite MoS2/Silk G

“…Several state-of-the-art oxidation methods for photocatalysis have been more important in technology over the past few years. Improved transformation advancements, including metal-air batteries, fuel cells and water electrolysis, are essential to this growth [20][21][22]. Nonetheless, to comprehend the advanced energy equipments however recognization of the underlying ideas, essentials and expertise of electrocatalysis is necessary.…”

Copper sulfide-incorporated layered porous sulfur-doped graphitic carbon nitride nanosheets for an efficient catalytic reduction of 4-nitrophenol

“…10,20,[29][30][31][32][33] Notable efforts have been made to heighten the catalytic performance of g-C 3 N 4 through heteroatom dopings such as boron (B), 34 phosphorus (P), 35 and sulfur (S), and S-g-C 3 N 4 has vastly enhanced the electronic and catalytic performances. 3,36,37 Lately, metal chalcogenides have been known to be viable catalytic candidates for their distinctive characteristics, [38][39][40][41] including catalytic 4-NP reduction 39,[42][43][44][45] due to a suitable band gap, low cost, and optimal electronic band position, and thus demonstrate excellent photo/catalytic activity. Copper sulfide (CuS) is a p-type semiconductor with a narrow band gap (1.63-1.87 eV), in which the availability of empty 3p-orbitals in sulfur is an electron acceptor and demonstrates superior physical and chemical properties.…”