文献类型：期刊文献

英文题名：Fluorinated conjugated poly(benzotriazole)/g-C3N4 heterojunctions for significantly enhancing photocatalytic H2 evolution

作者：Ye, Haonan[1,2];Wang, Zhiqiang[3,4];Yu, Fengtao[1,2];Zhang, Shicong[1,2];Kong, Kangyi[1,2];Gong, Xueqing[3,4];Hua, Jianli[1,2];Tian, He[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Inst Fine Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Key Lab Adv Mat, Ctr Computat Chem, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：267

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20200508111090);WOS:【SCI-EXPANDED(收录号:WOS:000518865300010)】；

基金：H.Y. and Z.W. contributed equally to this work. This work was supported by the National Natural Science Foundation of China (21788102, 21971064, 21825301, 21772040, 21790361 and 21572062), Shanghai Municipal Science and Technology Major Project (Grant No. 2018SHZDZX03), the Fundamental Research Funds for the Central Universities (50321101918001 and 222201717003) and the Programme of Introducing Talents of Discipline to Universities (B16017). The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Fluorination strategy; Donor-acceptor conjugated polymer; g-C3N4; Organic heterojunctions; Hydrogen evolution reactions

摘要：Organic conjugated polymers employed as suspension photocatalysts for hydrogen evolution reactions have attracted the attention of researchers. However, the low charge mobility and weak interface reactive activity prohibited their further application. Herein, three new polymers with fluorene as donor and nitrogen-rich benzotriazole containing different numbers fluorine atoms as acceptor unit were successfully synthesized and further to construct the polymer heterojunctions with g-C3N4 for efficient photocatalytic hydrogen evolution. Flu DFBZ with two fluorine atoms/g-C3N4 heterojunctions achieved the highest H-2 production rate of 14.85 mmol h(-1) g(-1) with a recorded apparent quantum yield of 33.49 % at 450 nm and good photocatalytic stability. Photoelectrochemical experiments combining with density functional theory calculations further supported that fluorination accelerated the charge transfer and adsorption capacity of H-containing species on the N sites of g-C3N4. This work offers a new strategy to obtain stable and efficient photocatalysts by using fluorination strategy of polymer/g-C3N4 heterojunctions.