文献类型：期刊文献

英文题名：Magnetic field assisted alpha-Fe2O3/Zn1-xFexO heterojunctions for accelerating antiviral agents degradation under visible-light

作者：Wu, Yadong Li, Tao Ren, Xulin Fu, Yuanxiang Zhang, Hongyan Feng, Xiaoqing Huang, Hongsheng Xie, Ruishi

通信作者：Huang, HS[1];Xie, RS[2]|[144406c0812405d42e8a8]黄宏升;

机构：[1]Guizhou Inst Technol, Sch Int Educ, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Southwest Univ Sci & Technol, Analyt & Testing Ctr, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Int Educ, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Southwest Univ Sci & Technol, Analyt & Testing Ctr, Sch Mat Sci & Engn, Mianyang 621010, Sichuan, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2022

卷号：10

期号：1

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000743906100001)】；

基金：This study was supported by the Opening Foundation of Sichuan Province Engineering Research Center for Powder Metallurgy, Chengdu University (SC-FMYJ2020-01), High Level Talent Scientific Research Startup Project of Guizhou Institute of Technology (XJGC20190614), Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory (19kfhk04), Key Laboratory of Energy Chemistry of Guizhou Province (No. Qian Jiao He Kyzi [2017] 009), and Science and Technology Project of Guizhou Province (No. Qian Ke He Ping Tai Ren Cai [2019] 5609), Application Foundation of Science and Technology Department of Sichuan Province (2020YJ0419), and National Natural Science Foundation of China (2150344, 21963006 and 42072048).

语种：英文

外文关键词：Magnetic-field; Magnetoresistance effect; Photocatalytic activity; Heterojunctions; Free radical

摘要：Reducing the recombination efficiency of photo-induced carriers has been found as an effective means to improve the degradation of antiviral agents. Given that the Lorentz forces can cause the abnormal charge to move in the opposite direction, external magnetic field improved alpha-Fe2O3/Zn1-xFexO heterojunctions (FZHx) were developed to remove increasing antiviral agents that were attributed to the COVID-19 pandemic under visible light. The characterization of the mentioned FZHx in the external magnetic field indicated that FZHx had perfect photocatalytic activity for degrading antiviral agents. In the external magnetic field, the quantities of photo-generated carriers and free radicals (center dot OH and center dot O-2(-)) derived from FZHx increased significantly, which improved antiviral agent removal by 30.0%. Though the band structure (alpha-Fe2O3) is unlikely to change due to some orders of magnitude weaker of Zeeman energy in magnetic fields, which insignificantly impacts photocatalytic performance. However, this study proposed a strategy of negative magnetoresistance effects and heterojunctions to facilitate the separation and transfer of photo-induced carriers in magnetic fields. Based on the proposed strategy, spin oriented electrons were selected and accumulated on the conduction band, which contributed to the degradation of antiviral agents. Overall, this study presented novel insights into the improved degradation performance of antiviral agents by applying Fe-based heterojunctions in an external magnetic field.