文献类型：期刊文献

英文题名：Photocatalytic degradation of organic pollutants coupled with simultaneous photocatalytic H2 evolution over graphene quantum dots/Mn-N-TiO2/g-C3N4 composite catalysts: Performance and mechanism

作者：Nie, Yu-Chun[1];Yu, Fan[1];Wang, Lai-Chun[1];Xing, Qiu-Ju[1];Liu, Xia[2];Pei, Yong[2];Zou, Jian-Ping[1];Dai, Wei-Li[1];Li, Yan[3];Suib, Steven L.[4]

机构：[1]Nanchang Hangkong Univ, Key Lab Jiangxi Prov Persistent Pollutants Contro, Nanchang 330063, Jiangxi, Peoples R China;[2]Xiangtan Univ, Key Lab Environm Friendly Chem & Applicat, Minist Educ, Xiangtan 411105, Peoples R China;[3]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[4]Univ Connecticut, Dept Chem, Storrs, CT 06269 USA

年份：2018

卷号：227

起止页码：312

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20181004884048);WOS:【SCI-EXPANDED(收录号:WOS:000428491000032)】；

基金：We gratefully acknowledge the financial support of the NSF of China (51622806, 51378246, 51238002, and 51272099) and the NSF of Jiangxi Province (20162BCB22017, 20165BCB18008, 20171ACB20017, 20133ACB21001, and 20122BCB23013). SLS acknowledges the support of the US Department of Energy, Office of Basic Energy Sciences, Division of Chemical, Biological and Geological Sciences under grant DE-FG02-86ER13622.A000.

语种：英文

外文关键词：Degradation; Graphitic carbon nitride; Hydrogen evolution; Organic pollutants; Photocatalysis

摘要：Graphene quantum dots/Mn-N-TiO2/g-C3N4 (GQDs/TCN) composite photocatalysts have been designed, synthesized and characterized by XRD, SEM, TEM, Raman, BET, and XPS. The photodegradation of organic pollutants (p-nitrophenol, diethyl phthalate and ciprofloxacin, called as 4-NP, CIP and DEP, respectively) coupled with simultaneous photocatalytic production of hydrogen was successfully achieved using the GQDs/TCN catalysts. The 5%GQDs/TCN-0.4 sample shows the best photocatalytic hydrogen production and organic pollutant degradation rate under simulated solar irradiation in the simultaneous photocatalytic oxidation and reduction system. Furthermore, the photocatalytic H-2 evolution rates in the solution of 4-NP, CIP and DEP are all larger than that in pure water system over the 5%GQDs/TCN-0.4 catalyst. And the H-2 evolution rate in the solution of 4-NP is smaller than that in the solutions of CIP and DEP. Accordingly, the photodegradation rate of 4-NP is larger than that of CIP and DEP. The analyses of density functional theory and liquid chromatography mass spectrometry indicate that some photogenerated electrons were used in the photodegradation process of 4-NP but not in that of CIP and DEP. And it leads to the photocatalytic rate of H-2 evolution in the 4-NP solution smaller than that in the solution of CIP and DEP. For the first time, the present work illuminates the photocatalytic enhancement of the GQDs/TCN-0.4 catalyst and the mechanism of the effect of different organic pollutants on photocatalytic H-2 evolution.