文献类型：期刊文献

英文题名：pH-controlled mechanism of photocatalytic RhB degradation over g-C3N4 under sunlight irradiation

作者：Shi, Weina[1]; Fang, Wen-Xue[2,3]; Wang, Ji-Chao[3,4]; Qiao, Xiu[3]; Wang, Beibei[4]; Guo, Xiaowei[1]

通讯作者：Wang, Ji-Chao

机构：[1] School of Chemistry and Materials Engineering, Xinxiang University, Xinxiang, 453003, China; [2] Institute of Forensic Science, Xinxiang Municipal Public Security Bureau, Xinxiang, 453003, China; [3] School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450000, China; [4] College of Chemistry and Chemical Engineering, Henan Institute of Science and Technology, Xinxiang, 453000, China

第一机构：新乡学院

通讯机构：[3]School of Ecology and Environment, Zhengzhou University, Zhengzhou, 450000, China

年份：2021

卷号：20

期号：2

起止页码：303-313

外文期刊名：Photochemical and Photobiological Sciences

收录：EI(收录号：20210909977733);Scopus(收录号：2-s2.0-85101267119)

语种：英文

外文关键词：Rhodium compounds - Chemical analysis - Environmental technology - Metal ions - Metals - Photocatalytic activity - Photodegradation

摘要：Photocatalysis of dye degradation is one of green and cheap technologies for solving environmental pollution. Whereas it is rarely concerned that the degradation process varied with the change of solution condition, this work studied the influence of hydrion in the solution on the photodegradation process of Rhodamine B (RhB) over g-C3N4. The photocatalytic activity of RhB degradation was enhanced gradually with increased hydrion content in the system. The efficiency for RhB degradation over g-C3N4 in weak acidic system with interference of multiple metal-ions still reached near 95% after 30?min of natural sunlight irradiation. A large amount of oxidation species and the hydroxylation mineralization process were induced by increasing the hydrion concentration. Two degradation processes for deethylation of four ethyl groups and the direct chromophoric degradation were discovered and proved by multifarious intermediates in different systems using the ESR technique, LC/MS and GC/MS analysis. In addition, the photosensitization played a critical role in the RhB degradation. A feasible degradation mechanism was proposed for the RhB degradation based on the experimental results. ? 2021, The Author(s), under exclusive licence to European Photochemistry Association,European Society for Photobiology.