Substituent engineering in g-C_(3)N_(4)/COF heterojunctions for rapid charge separation and high photo-redox activity

作     者：Jiayun Guo Dongge Ma Fulin Sun Guilin Zhuang Qi Wang Abdullah M.Al-Enizi Ayman Nafady Shengqian Ma 

作者机构：School of Environmental Science and EngineeringZhejiang Gongshang UniversityHangzhou 310018China Department of ChemistryCollege of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China Institute of Industrial CatalysisCollege of Chemical EngineeringZhejiang University of TechnologyHangzhou 310023China Department of ChemistryCollege of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of ChemistryUniversity of North TexasDentonTX 76201USA 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2022年第65卷第9期

页      面：1704-1709页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(21876154) the Fundamental Research Funds for the Provincial Universities of Zhejiang(JRK22001) Partially support from the Robert A.Welch Foundation(B-0027)(SM) the Researchers Supporting Program(RSP-2022/55)at King Saud University,Riyadh,Saudi Arabia(AMA) 

主　　题：monofluorophosphate g-C_(3)N_(4) heterojunction photocatalysis substituent electronegativity 

摘      要：The heterojunction composed of covalent organic frameworks(COFs)with adjustable structure and other photocatalysts has great potential in the field of ***,effectively enhancing the photocatalytic performance of organic heterojunctions by designing the structure of COFs has not been ***,TPB-TP-COFs fabricated from 1,3,5-tris(4-amino-phenyl)benzene(TPB)and terephthalaldehyde(TP)with different substituents(−H,−OH,−OCH_(3),−Br and−F groups),were applied to construct g-C_(3)N_(4)/*** performance improvement of the heterojunction could be affected by substituents,and only−OCH_(3) groups can significantly improve both the photocatalytic phenol oxidation and Cr(Ⅵ)*** calculation demonstrated that the substituents will affect the electron cloud distribution of CBM,and the location of CBM in the TPB segment is beneficial for the charge transport between TPB-TP-OCH_(3) and g-C_(3)N_(4).The enhanced charge transfer from g-C_(3)N_(4) to TPB segment and the improved light absorption of TPB-TP-OCH_(3) jointly optimize the photocatalytic redox capacity of g-C_(3)N_(4)/TPB-TP-OCH_(3).On the basis of this study,regulating the electronic effects of semiconductors played a vital role in improving photocatalytic performance in organic heterojunctions.