Noble metals (Pd, Ag, Pt, and Au) doped bismuth oxybromide photocatalysts for improved visible light-driven catalytic activity for the degradation of phenol

A Review of Synthesis Methods, Modifications, and Mechanisms of ZnO/TiO2-Based Photocatalysts for Photodegradation of Contaminants

“…Modification of photocatalysts with metals, including transition metals, , rare earth metals, , noble metals, , semimetals, and alkaline earth metals, , improves organic pollutant treatment. Generally, doping of metals is carried out by reducing and precipitating ion metals into the ZnO and/or TiO 2 nanoparticle suspensions in the presence of a reduction agent.…”

Enhancing the adsorption–photocatalytic efficiency of BiOBr for Congo red degradation by tuning the surface charge and bandgap via an Y3+–I− co-doping strategy

“…When introduced into BiOCl lattices, the yttrium cation (Y 3+ ) can displace Bi 3+ and induce lattice distortion, thereby narrowing the bandgap of BiOCl and upgrading the photocatalytic activity. 44 In the case of BiOBr, Mn, 45 Fe, 46 Sn, 27 Co, 47 Y, 48,49 Ce, 28,50 Ti, 51 Cu 29 and noble metal 52 ions have been embedded to regulate the atomic array in [Bi 2 O 2 ] 2+ sheets. Compared with pure BiOBr, the doped catalysts exhibit doubled or even four-fold photocatalytic efficiency and their recyclability can be sustained.…”

“…Compared with pure BiOBr, the doped catalysts exhibit doubled or even four-fold photocatalytic efficiency and their recyclability can be sustained. 29,50,52 Foreign ions can regulate the assembly process and result in defected structures, and the upgraded degradation performance can be attributed to the induced oxygen vacancies (OVs) and active sites. 45,47 The doped architectures possess an optimized bandgap and can effectively improve the transfer of photo-excited carriers while lowering their recombination.…”

Review of Recent Developments in the Fabrication of ZnO/CdS Heterostructure Photocatalysts for Degradation of Organic Pollutants and Hydrogen Production

“…They have a prohibited energy gap that requires visible light to migrate electrons from the filled VB to the CB. This excites a positive hole in the VB and a free electron in the CB, resulting in an electron-hole pair [21][22][23]. The ultimate purpose of the photocatalyst design is to allow reactions between the produced holes and reductant, leading to the production of an oxidized product, while simultaneously facilitating the interaction of excited electrons to produce a reduced product.…”