Multiobjective-Optimization MoS2/Cd-ZnIn2S4/CdS Composites Prepared by In Situ Structure-Tailored Technique for High-Efficiency Hydrogen Generation

Photocatalytic water splitting into hydrogen production provides a new avenue to produce clean chemical fuels. However, developing high-efficiency photocatalytic materials still remains a challenge till now. Herein, multiobjective-optimization MoS 2 /Cd-ZnIn 2 S 4 /CdS (MS/CZIS/CS) composites are successfully constructed by an in situ structure-tailored technique. Benefiting from the synergistic feature integrating sulfur vacancy, II-type CZIS/CS heterojunction and Schottky-type MS/CS heterojunction, such composites not only effectively steer photogenerated carrier transfer but also markedly expedite surface reaction kinetics for hydrogen reduction reaction. As a result, an optimal hydrogen evolution rate of 11.49 mmol g −1 h −1 is achieved over the MS/CZIS/CS catalysts, which is approximately 4.79 times higher than that of pristine ZIS (2.40 mmol g −1 h −1 ). This work provides some new inspirations for the steering of carrier transfer and the design of multiobjective-optimization photocatalysts with high efficiency.