Citation: Linlin Sun, Chongyang Liu, Jinze Li, Yaju Zhou, Huiqin Wang, Pengwei Huo, Changchang Ma, Yongsheng Yan. Fast electron transfer and enhanced visible light photocatalytic activity by using poly-o-phenylenediamine modified AgCl/g-C₃N₄ nanosheets[J]. Chinese Journal of Catalysis, ;2019, 40(1): 80-94. doi: 10.1016/S1872-2067(18)63172-9 shu

Fast electron transfer and enhanced visible light photocatalytic activity by using poly-o-phenylenediamine modified AgCl/g-C₃N₄ nanosheets

a Institute of Green Chemistry and Chemical Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China;
b School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, Jiangsu, China

Received Date: 25 July 2018
Revised Date: 18 September 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21576125, 21776117), the China Postdoctoral Science Foundation (2017M611716, 2017M611734), the Six talent peaks project of Jiangsu Province (XCL-014), and the Zhenjiang Science & Technology Program (SH2016012).

Exfoliation of bulk graphitic carbon nitride (g-C₃N₄) into two-dimensional (2D) nanosheets is one of the effective strategies to improve its photocatalytic properties so that the 2D g-C₃N₄ nanosheets (CN) have larger specific surface areas and more reaction sites. In addition, poly-o-phenylenediamine (PoPD) can improve the electrical conductivity and photocatalytic activity of semiconductor materials. Here, the novel efficient composite PoPD/AgCl/g-C₃N₄ nanosheets was first synthesized by a precipitation reaction and the photoinitiated polymerization approach. The obtained photocatalysts have larger specific surface areas and could achieve better visible-light response. However, silver chloride (AgCl) is susceptible to agglomeration and photocorrosion. The PoPD/AgCl/CN composite exhibits an extremely high photocurrent density, which is three times that of CN. Obviously enhanced photocatalytic activities of PoPD/AgCl/g-C₃N₄ are revealed through the photodegradation of tetracycline. The stability of PoPD/AgCl/CN is demonstrated based on four cycles of experiments that reveal that the degradation rate only decreases slightly. Furthermore,·O₂^- and h⁺ are the main active species, which are confirmed through a trapping experiment and ESR spin-trap technique. Therefore, the prepared PoPD/AgCl/CN can be considered as a stable photocatalyst, in which PoPD is added as a charge carrier and acts a photosensitive protective layer on the surface of the AgCl particles. This provides a new technology for preparing highly stable composite photocatalysts that can effectively deal with environmental issues.
- g-C₃N₄ nanosheets,
- AgCl,
- Poly-o-phenylenediamine,
- Visible light irradiation,
- Photocatalytic
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Fast electron transfer and enhanced visible light photocatalytic activity by using poly-o-phenylenediamine modified AgCl/g-C3N4 nanosheets

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通讯作者: 陈斌, bchen63@163.com

Fast electron transfer and enhanced visible light photocatalytic activity by using poly-o-phenylenediamine modified AgCl/g-C₃N₄ nanosheets