文献类型：期刊文献

英文题名：Enhanced efficiency of interfacial charge transfer in Ag 3 PO 4 /BiPO 4 @CNTs photocatalyst for amoxicillin degradation: Synergistic effect of p-n heterojunction and conjugated channels

作者：Wu, Yadong Luo, Yongxin Yang, Chaoseng Wu, Qijun

第一作者：Wu, Yadong

通信作者：Wu, YD[1];Wu, QJ[1];Wu, YD[2]|[14440d91d782df18e7be0]吴其俊;

机构：[1]Guizhou Inst Technol, Coll Artificial Intelligence & Elect Engn, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550003, 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, Coll Artificial Intelligence & Elect Engn, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Guizhou Univ, Coll Resources & Environm Engn, Guiyang 550003, Peoples R China.|贵州理工学院化学工程学院;贵州理工学院;

年份：2024

卷号：51

外文期刊名：SURFACES AND INTERFACES

收录：;Scopus(收录号：2-s2.0-85198553733);WOS:【SCI-EXPANDED(收录号:WOS:001273282500001)】；

基金：This study was supported by the Education Department of Guizhou Province (QJJ [2022] 266) . Guizhou Provincial Federation of Social Sciences (GZLCLH-2024-97) .

语种：英文

外文关键词：Conjugation effect; n -p heterojunction; Redox pathway; Energy level; Visible light

摘要：Inspired by the remarkable efficiency in separating photogenerated carriers achieved through the fabrication of conjugated polymeric photocatalysts, we have developed a novel photocatalytic system. This system utilizes carbon nanotubes coated with an Ag3PO4/BiPO4 p-n heterostructure (ABCx) for the degradation of amoxicillin in aquatic environments under visible light. The ABCx conjugated photocatalysts demonstrate excellent efficiency in photogenerated charge separation, material stability, and effective amoxicillin removal. The first-order kinetic constants for ABCx (x[parts per thousand]=2, 5, 7) show enhancements of 1.40-fold, 2.53-fold, and 2.10-fold, respectively, compared to those of Ag3PO4/BiPO4 in the degradation of amoxicillin. FT-IR and photochemical conversion studies reveal the presence of delocalized pi-bonds within the conjugated system (P = C-C = C center dot center dot center dot C = O), which can lead to the formation of a rapidly generated and long-lived triplet state T1 rather than the lowest singlet excited state S1 generated from either direct excitation or reverse intersystem crossing. In situ XPS analysis confirms that photogenerated charges migrate from BiPO4 to Ag3PO4 through a conjugated redox pathway. Density Functional Theory (DFT) was employed to investigate the work function, determining the Fermi levels of Ag3PO4 and BiPO4 to be -4.27 eV and -5.09 eV, respectively, and further confirming the direction of charge migration. In summary, the incorporation of conjugated pi bonds via an inorganic semiconductor heterojunction enhances the efficiency of photogenerated charge separation and transport.