Effect of silver incorporation on the photocatalytic degradation of Reactive Red 120 using ZnS nanoparticles under UV and solar light irradiation

Recent Developments in ZnS-Based Nanostructures Photocatalysts for Wastewater Treatment

“…Thus, ZnS is more responsive to the absorption of UV light (λ < 340 nm), which represents approximately 4% of the total amount of sunlight. To extend the applications of ZnS photocatalysts in Vis light (λ ≥ 420 nm) of the solar spectrum by narrowing the band gap energy and adjusting CB/CV band-edge positions, many research groups have attempted different strategies, such as morphology variation [ 24 , 38 , 49 ], metal/nonmetal ion doping [ 50 , 51 ], semiconductors nanocomposites developing [ 52 ], and surface defects controlling [ 27 ].…”

“…These holes react with water and form hydroxyl radicals (HO•), while photogenerated electrons from ZnS QDs CB generate the reduction reaction of O 2 molecules to anionic superoxide radicals (O 2 − •). Both radicals act as strong oxidants for degradation and mineralization of MB dye molecules and transform them into CO 2 , H 2 O, and degraded products [ 44 , 50 ].…”

“…The effect of capping agents and Ag-doping on the morphology, optoelectronic, and photocatalytic properties of ZnS NS photocatalysts has been the subject of many studies. In recent works [ 44 , 49 , 50 ], the photocatalytic activity of ZnS and Ag-ZnS catalysts for different dyes’ degradation were studied comparatively, under irradiation with UV light and sunlight, respectively.…”

“…By a simple hydrothermal method using ascorbic acid as reducing agent, ZnS and Ag-doped ZnS (Ag-ZnS with 1% wt Ag) nanostructures were prepared by Ravikumar et al [ 50 ]. The addition of Ag in the ZnS lattice had, as a result, a decrease of crystallite sizes, from 14.3 nm in ZnS to 12.4 mm in Ag-ZnS, due to the Ag + ions diffusion at the ZnS surface, preventing interfacial grain growth (the symmetry-breaking effect).…”

Effect of the green synthesis of CuO plate-like nanoparticles on their photodegradation and antibacterial activities

“…Recently, photocatalytic methods have received extensive attention due to their effective decolorization of dyes. 26,27 In a photocatalytic reaction, the semiconductor material absorbs energy equal to the band gap, producing electric charges that can effect oxidation and reduction reactions, leading to degradation of the dye. Some key organic dyes, such as methylene blue (MB), crystal violet (CV), Coomassie brilliant blue (CBB), and malachite green (MG), are majorly used for colouring fabrics.…”