Preparation and Photocatalytic Hydrogen Production Performance of Mo2C-modified ZnCdS Materials
FAN Ming'ang1, XIE Xiaoqi1,4 ,*, FENG Li1,2,3, DU Hongli1,2,3, LIU Chao1,2,3,*
1 School of Gemmology and Material Science, Hebei GEO University, Shijiazhuang 050031, China 2 Hebei Key Laboratory of Green Development of Rock Mineral Materials, Shijiazhuang 050031, China 3 Engineering Research Center for Silicate Solid Waste Resource Utilization of Hebei Province, Shijiazhuang 050031, China 4 Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
Abstract: The present work made a successful attempt at synthesizing a Mo2C-modified ZnCdS composite photocatalytic material an in-situ deposition method. It carried out composition, structure, and property characterization, as well as photocatalytic hydrogen production test on the synthesized composite catalyst. The Mo2C/ZnCdS was found to grow in situ on the surface of Mo2C particles and formed a Schottky junction, and to exhibit a hydrogen production rate of 5.26 mmol·g-1·h-1, approximately 335% higher than that of ZnCdS. This work also gave a hypothesized photocatalysis mechanism of the Mo2C/ZnCdS for hydrogen evolution:(ⅰ) Mo2C, as a cocatalyst, had metal-like properties and high surface work function, which facilitated the formation of the internal electric field from ZnCdS to Mo2C at their interface;(ⅱ) this internal electric field accelerated the transfer rate of electrons and the electrons enriched on the surface of Mo2C, thus greatly increasing the photogenerated charge separation efficiency;(ⅲ) Mo2C acted as the active site of photocatalytic reaction (owing to its low hydrogen evolution overpotential), and further promotes the photocatalytic hydrogen production efficiency.
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2025, Vol. 39 
