文献类型：期刊文献

英文题名：Porous Mn doped g-C3N4 photocatalysts for enhanced synergetic degradation under visible-light illumination

作者：Wang, Ji-Chao[1];Cui, Cheng-Xing[1];Li, Ying[1];Liu, Lu[1];Zhang, Yu-Ping[1];Shi, Weina[2,3]

第一作者：Wang, Ji-Chao

通讯作者：Wang, JC[1];Shi, WN[2]

机构：[1]Henan Inst Sci & Technol, Coll Chem & Chem Engn, Eastern Hualan Ave, Xinxiang 453003, Peoples R China;[2]Xinxiang Univ, Coll Chem & Chem Engn, Jinsui Rd 191, Xinxiang 453003, Peoples R China;[3]Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Luoyu Rd 1037, Wuhan 430074, Hubei, Peoples R China

第一机构：Henan Inst Sci & Technol, Coll Chem & Chem Engn, Eastern Hualan Ave, Xinxiang 453003, Peoples R China

通讯机构：[1]corresponding author), Henan Inst Sci & Technol, Coll Chem & Chem Engn, Eastern Hualan Ave, Xinxiang 453003, Peoples R China;[2]corresponding author), Xinxiang Univ, Coll Chem & Chem Engn, Jinsui Rd 191, Xinxiang 453003, Peoples R China.|[110713]新乡学院化学化工学院;[11071]新乡学院;

年份：2017

卷号：339

起止页码：43-53

外文期刊名：JOURNAL OF HAZARDOUS MATERIALS

收录：;EI(收录号：20172503794679);Scopus(收录号：2-s2.0-85020707422);WOS:【SCI-EXPANDED(收录号:WOS:000407188200005)】；

基金：This work was supported by the National Natural Science Foundation of China (No. 21307026), the Education Department of Henan Province (No. 2013GGJS-138, 14B150019), China Postdoctoral Science Foundation Funded Project (No. 2017M612391), the Innovation Team in Henan Province (No. C20150020), the Key Scientific Research Project Funding Scheme of Colleges and Universities of Henan Province (16A150007), the Landmark Innovation Project of Henan Institute of Science and Technology (No. 2015BZ02) and the Research Foundation for Advanced Talents of Henan Institute of Science and Technology (No. 2016035).

语种：英文

外文关键词：Synergistic effect; g-C3N4; Mn doping; Surface modification; Cr(VI) reduction

摘要：Photocatalytic degradation by semiconductors is an ideal way to solve the environmental problem. Here, the porous Mn doped g-C3N4. photocatalyst was synthesized by the calcination-refluxing method. The as-prepared g-C3N4 exhibits the high activity of photocatalytic degradation undervisible light irradiation (> 400 nm) in the mixed system of Cr(VI) and organic pollutants. Especially, the photocatalytic activity of Cr(VI) reduction was increased from 9.5% to 76.5%, while that of Rho damine B(RhB) degradation was enhanced from 153% to 88.9% after 60 min irradiation. The porous Mn doped g-C3N4 still keeps the high degradation efficiency of mixed pollutants in the 7th running. Based on the computational modeling, the Mn doping and carboxyl modification affect the atomic arrangement and molecular orbital distribution of the g-C3N4 semiconductor, leading to the enhancement of photo-induced carrier separation. Additionally, the active oxygen species and intermediates in the photoreaction process were discovered by ESR measurement and UV-vis test. The RhB degradation in synergistic photocatalysis not only inhibits the reverse reaction of Cr(VI) reduction, but also validly supply the photogenerated electrons by the photosensitization effect. This work may be useful for rationally designing photocatalysts and providing illuminating insights into the photocatalytic mechanism. (c) 2017 Elsevier B.V. All rights reserved.