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

As a green technology, photocatalytic reduction of CO2 can reduce CO2 into reusable carbon-based fuels and alleviate environmental and energy problems to a certain extent. However, traditional photocatalytic materials have irreparable defects that limit their applications in photocatalysis, and it becomes a great challenge to find an efficient photocatalytic material. ZnIn2S4, a new photocatalyst, is widely used in photocatalysis because of its layered structure, tunable band gap, excellent photoelectric properties, and catalytic characteristics, and it is also favored by a wide range of scientific researchers due to its stable chemical properties. The construction of heterojunctions can further increase the photocatalytic ability of ZnIn2S4. This review introduces the electron transfer mechanism of different ZnIn2S4-based heterojunctions in the photocatalytic process and its recent research progress in photocatalytic CO2 reduction applications. Finally, an outlook on constructing ZnIn2S4-based heterojunctions and their development prospects is presented.