文献类型：期刊文献

英文题名：Solar-driven water decontamination via a novel N-MIL-53(Fe)/Bi4O5I2 Z-scheme heterojunction photocatalyst: The role of abundant reactive oxygen species and rapid interfacial charge transfer

作者：Song, Yanyu[1];Sun, Xianbo[1];Nghiem, Long D.[2];Duan, Jun[3];Liu, Wen[4];Liu, Yongdi[1];Cai, Zhengqing[1,5]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[2]Univ Technol Sydney, Ctr Technol Water & Wastewater, Sch Civil & Environm Engn, Ultimo, NSW 2007, Australia;[3]Purdue Univ, Dept Agron, W Lafayette, IN 47907 USA;[4]Peking Univ, Coll Environm Sci & Engn, Key Lab Water & Sediment Sci, Minist Educ, Beijing 100871, Peoples R China;[5]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200237, Peoples R China

年份：2025

卷号：70

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001409221900001)】；

基金：This research was supported by Natural Science Foundation of Shanghai [21ZR1415600] , National Natural Science Foundation of China (22176061, 41807340) , and Science and Technology Commission of Shanghai Municipality (21230712000) .

语种：英文

外文关键词：Interfacial charge transfer; Internal electric field; Solar-driven photocatalysis; Water remediation; Reactive oxygen species

摘要：Benefiting from the fascinating photogenerated carrier separation performance, heterojunction photocatalysts are widely developed and applied for solar-driven water decontamination. However, the inefficient interfacial charge transfer caused by relatively weak internal electric field (IEF) still restrict the photocatalysis activity of some heterojunction. To seek strategies for improving interfacial photoinduced carrier separation in heterojunctions, N-MIL/Bi (N-MIL is N-substituted iron-based MIL-53, and Bi is Bi4O5I2) and MIL/Bi heterojunctions were constructed. Compared with MIL/Bi, N-MIL/Bi exhibits enhanced interfacial charge migration. According to density functional theory (DFT) calculations, N substitution induces stronger IEF (from 4.93 to 6.37 eV) to provide more sufficient driving force for interfacial charge migration. N substitution narrows the bandgap of heterojunction interface to reduce electron transfer resistance, and simultaneously suppresses the unexpected electron capture by H+ and O2 in N-MIL-53(Fe), thereby achieving improved interfacial charge transfer. Additionally, compared with original MIL/Bi, N-MIL/Bi shows narrower bandgap and correspondingly improved visible light response. Therefore, N-MIL/Bi achieves dramatically improved production of reactive oxygen species under solar light, where the steady-state production rate of dominant center dot OH and center dot O2- by N-MIL/Bi is ca. 1.4 and 1.3 times that by MIL/Bi. Accordingly, N-MIL/Bi shows prominent contaminant removal efficiency and toxicity elimination in environmental remediation application. For photodegrading norfloxacin, the elimination rate by N-MIL/Bi under solar light and visible light is ca.1.5 and 2.0 folds that by MIL/Bi, respectively. This study provides new insights into efficient solar-driven decontamination by constructing rational Z-scheme heterojunctions with enhanced interfacial charge transfer.