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, JC[1];Wang, JC[2]

机构：[1]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[2]Xinxiang Municipal Publ Secur Bur, Inst Forens Sci, Xinxiang 453003, Henan, Peoples R China;[3]Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450000, Peoples R China;[4]Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Zhengzhou Univ, Sch Ecol & Environm, Zhengzhou 450000, Peoples R China;[2]corresponding author), Henan Inst Sci & Technol, Coll Chem & Chem Engn, Xinxiang 453000, Henan, Peoples R China.

年份：2021

卷号：20

期号：2

起止页码：303-313

外文期刊名：PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000619893000001)】；

基金：This work was supported by the financial supports of National Natural Science Foundation of China (No. 51802082), Natural Science Foundation of Henan Province (212300410221), Program for Science & Technology Innovation Talents in Universities of Henan Province (No. 21HATIT016), Key Scientific and Technological Project of Henan Province (212102210473), Key Scientific Research Project of Henan Provincial Education Department (21A430030) and "Climbing" Project of Henan Institute of Science and Technology (No. 2018CG04).

语种：英文

外文关键词：g-C3N4; Hydrion; Photosensitization degradation; Sunlight; Oxidation species; Degradation process

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.