A novel p-n heterojunction Mn0.25Cd0.75S/Co3O4 for highly efficient photocatalytic H2 evolution under visible light irradiation

被引:49
作者
Huang, Qun-Zeng [1 ,2 ]
Wang, Ji-Chao [3 ]
Ye, Li-Qun [2 ]
Zhang, Qian [1 ]
Yao, Hong-Chang [1 ]
Li, Zhong-Jun [1 ]
机构
[1] Zhengzhou Univ, Coll Chem & Mol Engn, Zhengzhou 450001, Henan, Peoples R China
[2] Nanyang Normal Univ, Engn Technol Res Ctr Henan Prov Solar Catalysis, Coll Chem & Pharmaceut Engn, Nanyang 473061, Peoples R China
[3] Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Peoples R China
关键词
Mn-0.25; Cd0.75S; Co3O4; Photocatalytic hydrogen evolution; p-n heterojunction; MN-CD-S; HYDROGEN EVOLUTION; DRIVEN PHOTOCATALYST; HYDROTHERMAL SYNTHESIS; OPTICAL-PROPERTIES; SOLID-SOLUTIONS; WATER; DEGRADATION;
D O I
10.1016/j.jtice.2017.08.030
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The construction of p-n heterojunction is an efficient strategy to restrain photogenerated charge carriers recombination and enhance the photocatalytic efficiency toward H-2 evolution from water splitting. Herein a novel p-n heterojunction Mn0.25Cd0.75S/Co3O4 was synthesized via facile hydrothermal method. Photocatalytic H-2 evolution of as-synthesized Mn0.25Cd0.75S/Co3O4 composites in the absence of noble metal co-catalysts under visible light irradiation (lambda >= 400 nm) was investigated. The results demonstrated that photocatalytic H-2 evolution of Mn0.25Cd0.75S was significantly enhanced by loading Co3O4 nanoparticles. It was confirmed that 0.48 wt% of Co3O4 loading content achieved the highest H-2 evolution rate of 25.71 mmol/g/h, which was about 5.35 times higher than that of pure Mn0.25Cd0.75S. The remarkably improved photocatalytic activity could be attributed to the formation of the p-n junction at the interface between Mn0.25Cd0.75S and Co3O4, effectively promoting interfacial charge transfer and separation. This work revealed that the p-n heterojunction Mn0.25Cd0.75S/Co3O4 may be a promising candidate for efficient energy conversion. (C) 2017 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:570 / 577
页数:8
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