Synergistic photocatalytic effect of porous g-C3N4 in a Cr(VI)/4-chlorophenol composite pollution system

doi:10.1016/S1872-2067(17)62912-7

Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (11): 1804-1811.DOI: 10.1016/S1872-2067(17)62912-7

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Synergistic photocatalytic effect of porous g-C₃N₄ in a Cr(VI)/4-chlorophenol composite pollution system

Kai Wei, Kexin Li, Zhenxing Zeng, Yuhua Dai, Liushui Yan, Huiqin Guo, Xubiao Luo

Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, Jiangxi, China

Received:2017-06-28 Revised:2017-09-12 Online:2017-11-18 Published:2017-11-24
Contact: 10.1016/S1872-2067(17)62912-7
Supported by:
This work was supported by the National Natural Science Foundation of China (51568049, 51468043, 21366024, 21665018), the National Science Fund for Excellent Young Scholars (51422807), the Natural Science Foundation of Jiangxi Province, China (20161BAB206118, 20171ACB21035), the Distinguished Youth Science Fund of Jiangxi Province (20162BCB23043), and the Natural Science Foundation of Jiangxi Provincial Department of Education, China (GJJ14515).

Abstract

Abstract:

The photocatalytic reduction of aqueous Cr(VI) to Cr(Ⅲ) was preliminarily studied using porous g-C₃N₄ as a photocatalyst under acidic conditions. The observed synergistic photocatalytic effect of porous g-C₃N₄ on a Cr(VI)/4-chlorophenol (4-CP) composite pollution system was further studied under different pH conditions. Compared with single-component photocatalytic systems for Cr(VI) reduction or 4-CP degradation, the Cr(VI) reduction efficiency and 4-CP degradation efficiency were simultaneously improved in the Cr(VI)/4-CP composite pollution system. The synergistic photo-catalytic effect in the Cr(VI)/4-CP composite pollution system can be attributed to the accelerated redox reaction between dichromate and 4-CP by electron transfer with porous g-C₃N₄.

Key words: Composite pollution, Synergistic photocatalysis, Porous g-C₃N₄, Cr (VI), 4-Chlorophenol

Kai Wei, Kexin Li, Zhenxing Zeng, Yuhua Dai, Liushui Yan, Huiqin Guo, Xubiao Luo. Synergistic photocatalytic effect of porous g-C₃N₄ in a Cr(VI)/4-chlorophenol composite pollution system[J]. Chinese Journal of Catalysis, 2017, 38(11): 1804-1811.

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Synergistic photocatalytic effect of porous g-C₃N₄ in a Cr(VI)/4-chlorophenol composite pollution system

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