Sn-bridge type-II PCN/Sn/SnO heterojunction with enhanced photocatalytic activity

被引：8

作者：

Chen, Yefeng ^{[1
]}

Tang, Dan ^{[1
]}

Wang, Zhuhan ^{[1
]}

Yin, Mengyun ^{[1
]}

Yang, Qin ^{[1
]}

Zhou, Yafen ^{[1
]}

Cheng, Zhengjun ^{[1
]}

Wang, Zhonghua ^{[1
]}

Zhang, Kaiming ^{[2
]}

Zhou, Limei ^{[1
]}

机构：

[1] China West Normal Univ, Chem Synth & Pollut Control Key Lab Sichuan Prov, Nanchong 637002, Sichuan, Peoples R China

[2] Sichuan Univ Sci & Engn, Key Lab Green Chem Sichuan Inst Higher Educ, Zigong 643000, Sichuan, Peoples R China

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 2020年 / 35卷 / 11期

关键词：

photocatalysis; porous g-C3N4; electronic bridge; RhB degradation; benzylamine oxidation reaction; GRAPHITIC CARBON NITRIDE; IN-SITU SYNTHESIS; G-C3N4; NANOSHEETS; H-2; EVOLUTION; HYDROTHERMAL SYNTHESIS; HYDROGEN-PRODUCTION; FACILE FABRICATION; PERFORMANCE; COMPOSITE; 2D;

D O I：

10.1088/1361-6641/abac95

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The porous g-C3N4(PCN)/Sn/SnO ternary type-II heterojunction photocatalyst was synthesized by simple heat treatment combined with photodeposition. The results of a series of characterizations displayed that, with an electronic bridge structure, the type-II heterojunction photocatalyst has been successfully prepared. In the presence of PCN/Sn/SnO, RhB was degraded entirely in 40 min, and the conversion and selectivity of benzylamine oxidative reaction reached 99.9% within 6 h. The enhanced photocatalytic activity of PCN/Sn/SnO is attributed to high specific surface area and the metallic Sn(0)acting as electron bridges at the interface between SnO and PCN, which can accelerate the speed of photogenerated electrons transmission and inhibit recombination of photogenerated electron-hole pairs. After five cycles of operation, PCN/Sn/SnO maintained high photocatalytic activity. A reasonable photocatalytic reaction pathway was proposed via the free radical quenching test and mechanism analysis.

引用

页数：15

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