Efficient hydrogen production of WO3/ZnIn2S4 nanosheets heterojunction under simulated solar irradiation

Constructing heterojunctions to reduce the recombination of photogenerated electrons and holes is currently an effective method and strategy for improving photocatalytic performance. In this work, WO 3 /ZnIn 2 S 4 (WO 3 /ZIS) nanosheets as efficient photocatalytic hydrogen evolution photocatalysts was obtained by a simple one-step method. The research results from UVVis diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectroscopy (XPS) show that WO 3 /ZIS meets the typical type-II heterojunction system, which is benefit for increasing the rate of electron migration, thus reducing the recombination of photogenerated electrons and holes and improving catalytic performance. The optimal WO 3 /ZIS-2 (molar ratio of 1:2) composite material achieved a hydrogen production rate of 33.7 mmol· g −1 ·h −1 under simulated solar irradiation.