H2 production performance of photocatalyst and mechanism of WS2/g-C3N4 heterojunction

被引：0
|
作者：
Meng P. [1 ]
Guo M. [2 ]
Qiao X. [1 ]
机构：
[1] College of Mechanical Engineering, Xijing University, Xi'an
[2] College of Chemistry and Material, Weinan Normal University, Weinan
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 02期
关键词：
G-C[!sub]3[!/sub]N[!sub]4[!/sub; Heterojunction; Hydrogen; Photocatalysis; WS[!sub]2[!/sub;
D O I：
10.13801/j.cnki.fhclxb.20201011.001
中图分类号：
学科分类号：
摘要：
The WS2/graphite phase nitrogen carbide(g-C3N4) heterojunction was established through the solvent evaporation and second calcinations the mixture of g-C3N4 nanosheets and WS2 nanosheets. The main structure of g-C3N4 and WS2 in the heterojunction is not destroyed in the calcinations process and the interface is connected by chemical bond, which enhances the stability of heterojunction. The photocatalysis results indicate that the H2 production rate reaches to 68.62 μmol/h while the content of WS2 is 3wt%, which are 2.53 times and 15.29 times as that of g-C3N4 nanosheets and WS2 nanosheets, respectively. Besides, the H2 production rate is not decreased distinctly after 5 times circulation experiments, which reveals that the WS2/g-C3N4 heterojunction has a good chemical stability. Photoelectric property indicates that the establish of heterojunction structure can not only enhance the transport rate of excited electrons, but also suppress the recombination rate of charge carriers. Thus, the H2 production rate is enhanced distinctly compared with that of pure g-C3N4 nanosheets and WS2 nanosheets. Copyright ©2021 Acta Materiae Compositae Sinica. All rights reserved.
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页码：591 / 600
页数：9
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