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Updated: Jun 14, 2025
Developing Photosensitizer-Cobaloxime Hybrids for Solar-Driven H2 Production in Aqueous Aerobic Conditions
Published on: October 5, 2019
Constructing a Non-Noble Metal WC/CaIn2S4 Schottky Heterojunction Photocatalyst for Enhanced Photocatalytic H2
Wenjun Jiang1, Liang Zhou1,2,3, Tan Phong Nguyen4
1National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
Abstract:
To take the pronounced issue of recombination among photogenerated electrons and holes in the photocatalytic reaction, we report a WC/CaIn2S4 Schottky heterojunction photocatalyst using a straightforward one-step hydrothermal method and applied it for the enhanced hydrogen evolution reaction in photocatalysis. A stable Schottky energy barrier can be formed by closely connecting the metal-like WC with the n-type semiconductor CaIn2S4, accelerating the migration of photogenerated carriers. Meanwhile, WC can lower the overpotential for hydrogen evolution, leading to a notable enhancement in the photocatalytic hydrogen evolution rate. The hydrogen evolution rate of the optimal WC/CaIn2S4 Schottky heterojunction photocatalyst WCIS1 : 1 was approximately 2.3 times higher than that of Pt-loaded photocatalyst CIS+Pt. This study delves into the application significance of the Schottky heterojunction principle in the photocatalytic hydrogen production reaction. Furthermore, this study provides a novel approach to replacing noble metal Pt with metal-like WC in the field of photocatalytic hydrogen evolution.
