Construction of Ag: ZnIn2S4/Bi2S3 Z-scheme heterojunctions for boosting interfacial charge separation and photocatalytic degradation of TC

Recent Progress in Photocatalytic Reduction of CO2 by ZnIn2S4‐based Heterostructures

“…The morphology of ZnIn 2 S 4 has an important influence on its photocatalytic performance, and structural engineering can be used to increase the specific surface area of ZnIn 2 S 4 by changing its morphology, increase the reactive active sites of ZnIn 2 S 4 , and improve the electron transfer efficiency during the photocatalytic reaction. With the unremitting efforts of research workers, ZnIn 2 S 4 photocatalysts with rich morphology and structure have been successfully prepared, such as nanosheets, [38][39] nanotubes, [40] flower-like microspheres, [37,41] etc. Among many morphologies, ultrathin 2D ZnIn 2 S 4 is more advantageous in photocatalysis, but ZnIn 2 S 4 has high surface energy, to reduce the surface energy, during the formation of ZnIn 2 S 4 nanosheets, the ZnIn 2 S 4 nanosheets will be aggregated on the surface rapidly and assembled into a flower ball shape.…”

“…Their optical absorption edges are 538 nm and 490 nm, with band gaps of 2.3 eV and 2.5 eV, respectively. [33] The standard preparation methods of ZnIn 2 S 4 include the hydrothermal method, [34][35][36] the solvothermal method, [37][38] the microwave-assisted method, [39] etc. The reaction conditions of hydrothermal and solventthermal methods are relatively mild and simple, but the reaction time is long; microwave-assisted methods can largely shorten the reaction time compared with hydrothermal and solvent-thermal methods, but hydrothermal and solvent-thermal methods are more convenient, economical and environmentally friendly, so hydrothermal and solvent-thermal meth-ods are commonly used to synthesize ZnIn 2 S 4 and its composite materials.…”

“…To solve this problem, researchers have invested a lot of time and effort in the research on expanding the optical response range, enhancing the utilization of photogenerated carriers, and interfacial reaction rates. The main methods reported and commonly used are elemental doping, [47][48][49] defect engineering, [46,[50][51][52] structure design, [37][38][40][41][42] surface modification, [53] co-catalyst deposition, [54] and construction of heterojunctions. [55][56][57][58] By coupling ZnIn 2 S 4 with other semiconductors with suitable band gaps, the formed ZnIn 2 S 4 -based heterojunctions can adjust the band gaps and enhance the redox ability of the material.…”

“…The choice of synthetic method should be considered from several aspects, including laboratory conditions, costeffectiveness, and specific applications. Meanwhile, the morphology of ZnIn 2 S 4 can be changed by using different synthetic methods and metal precursors, such as nanosheets, [38][39] nanotubes, [40] flower-like microspheres, [37,41] etc. ZnIn 2 S 4 has the advantages of high visible light absorption efficiency, tunable band gap, good photochemical stability, low cost, and other benefits, so it is widely used in photocatalytic water hydrogen production, [40][41][42] removal of heavy metal ions from water, [28,36,43] degradation of organic pollutants in water, [34][35]37] CO 2 reduction reaction, [39,[44][45][46] etc.…”