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Facile one-pot synthesis of carbon self-doped graphitic carbon nitride loaded with ultra-low ceric dioxide for high-efficiency environmental photocatalysis: Organic pollutants degradation and hexavalent chromium reduction
Xu, Fuhang1,2; Lai, Cui1,2; Zhang, Mingming1,2; Li, Bisheng1,2; Liu, Shiyu1,2; Chen, Ming3; Li, Ling1,2; Xu, Yang1,2; Qin, Lei1,2; Fu, Yukui1,2
2021-11-01
摘要In the present study, an innovative carbon self-doped g-C3N4 (CCN) loaded with ultra-low CeO2 (0.067-0.74 wt%) composite photocatalyst is successfully synthesized via a facile one-pot hydrothermal and calcination method. The CeO2/CCN exhibits superior photocatalytic performance for tetracycline degradation (78.9% within 60 min), H2O2 production (151.92 mu mol L-1 within 60 min), and Cr(VI) reduction (99.5% within 40 min), which much higher than that of g-C3N4, CCN, CeO2, and CeO2/g-C3N4. The enhanced photocatalytic performance is originated from the fact that the doping of C can efficaciously broaden the utilization range of solar light and improve the reduction ability of photogenerated electrons. Meanwhile, the ultra-low loading of CeO2 can effectually promote the migration of photogenerated electrons and enhance the specific surface area. Besides, the experiments of pH effect and cycle ability indicate that CeO2/CCN has excellent durability and stability. Finally, the photocatalytic mechanism of CeO2 CCN is systematically discussed. This work proves that combining element doping and semiconductor coupling is a promising strategy to design high-efficiency g-C3N4-based photocatalysts. (C) 2021 Elsevier Inc. All rights reserved.
关键词CeO2 C-doped g-C3N4 Photocatalytic degradation Cr(VI) reduction
DOI10.1016/j.jcis.2021.05.124
发表期刊JOURNAL OF COLLOID AND INTERFACE SCIENCE
ISSN0021-9797
卷号601页码:196-208
通讯作者Lai, Cui(laicui@hnu.edu.cn) ; Chen, Ming(chenming@cigit.ac.cn)
收录类别SCI
WOS记录号WOS:000688572000007
语种英语