Amorphous CoB Modified ZnxCd1-xS to Construct Schottky Junction for Enhanced Photocatalytic Hydrogen Evolution

In this paper, nanosized ZnxCd1-xS is synthesized by a simple hydrothermal method and modified by amorphous CoB. ZnxCd1-xS/CoB Schottky heterojunction composite photocatalyst is reasonably designed. The adhesion of tiny ZnxCd1-xS nanoparticles to irregular block CoB is more conducive to the dispersion of ZnxCd1-xS and better interface connection between catalysts, thus further promoting the migration of photogenerated carriers, protecting the photocorrosion of ZnxCd1-xS, and finally improving the efficiency of photocatalytic hydrogen production. The composite catalyst ZnxCd1-xS/CoB-20 means that the loading content of CoB is 20 wt%, and the photocatalyst has the highest catalytic efficiency under visible light, reaching 1494.09 mu mol within 5 h. Through the characterization of XRD, XPS, electrochemical and optical properties of the catalyst, it is proved that the introduction of CoB can significantly inhibit the recombination of photogenerated electron holes and enhance the response to visible light. This study provides a feasible scheme for co-catalysts to replace precious metal catalysts and effectively reduce ZnxCd1-xS photocorrosion.