Designed Cose2@Znin2s4 Large Area 2d/2d Schottky Junction for Efficient Photo-Utilization Hydrogen Evolution and Biomass Oxidation

Abstract

The development of low-cost and high-performance photocatalysts is of great significance in achieving clean energy and carbon neutrality. In this paper, a unique 2D/2D CoSe2@ZnIn2S4 (CoSe2@ZIS) Schottky junction photocatalyst was successfully synthesized by a feasible hydrothermal method. Such a unique face-to-face structure can provide a large number of electron transfer channels with short charge transfer distances and abundant active sites. The formation of a Schottky junction in the interface further realizes the spatial separation of electrons and holes, effectively avoiding the recombination of the charge carriers at defect sites. As a result, the hydrogen evolution rate of the optimal CoSe2@ZIS sample reaches 46.6 mmol•h-1•g-1 using TEOA as a sacrifice agent, which is more than 6 times that of the ZIS. When the biomass-derived compound furfuryl alcohol (FFA) was added into this system, the photocatalytic H2 production performance could be further promoted, simultaneously obtaining value-added furfural (FF) products. This work shows that the ZnIn2S4-based Schottky heterojunction is a promising bifunctional photocatalytic for photocatalytic water splitting and biomass conversion applications.

Keywords: 2D/2D structure, CoSe2@ZnIn2S4, Schottky, Furfuryl alcohol, H2 production