Bifunctional honeycomb hierarchical structured 3D/3D ReS2/ZnIn2S4-Sv heterojunction for efficient photocatalytic H2-evolution integrated with biomass oxidation

Abstract

Photo-redox dual reaction system is an emerging strategy for H2-evolution integrated with biomass conversion, which exhibits promise to overcome sluggish water oxidation during overall water splitting. Constructing efficient catalytic materials with strong sunlight response and rapid optoelectronic dynamics remains a significant challenge. Herein, we design and fabricate a novel bifunctional honeycomb hierarchical structured 3D/3D ReS2/ZnIn2S4-Sv heterojunction for efficient photocatalytic H2-evolution coupled with high value-added biomass conversion, in which Sv can be created in situ under NH2OH·HCl-assisted hydrothermal condition. The nanoengineering and electronic modulation of ZnIn2S4 by ReS2 and Sv enable its large specific surface area, rapid charge separation, and suppressed carrier recombination, which is beneficial for photocatalytic reactions. As a result, the optimized 20 % ReS2/ZnIn2S4-Sv exhibits superior H2 and furfural generation rates of 1.08 and 0.71 mmol·g−1·h−1, respectively. This work highlights an efficient photocatalyst and a new strategy for this bifunctional photocatalytic system of H2-evolution integrated with biomass conversion.