文献类型：期刊文献

英文题名：Construction of Z-scheme Ag/AgVO3/carbon-rich g-C3N4 heterojunction for enhanced photocatalytic degradation of sulfamethiadiazole: DFT calculation and mechanism study

作者：Liu, Zhixin[1];Liu, Yongdi[1];Sun, Xianbo[1];Ji, Haodong[2];Liu, Wen[2];Cai, Zhengqing[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Reso, Shanghai 200237, Peoples R China;[2]Peking Univ, Coll Environm Sci & Engn, Minist Educ, Key Lab Water & Sediment Sci, Beijing 100871, Peoples R China

年份：2022

卷号：433

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20214811238497);WOS:【SCI-EXPANDED(收录号:WOS:000772966100001)】；

基金：Acknowledgments This study was financially supported by the National Natural Science Foundation of China [41807340, 22176061] , National Key R&D Pro-gram (2019YFC0408200) , and the Natural Science Foundation of Shanghai [21ZR1415600] .

语种：英文

外文关键词：Photocatalytic; Antibiotics;

Ag/AgVO3

Carbon-rich g-C3N4

摘要：A novel Z-scheme Ag/AgVO3/carbon-rich g-C3N4 heterojunction with excellent solar-light-driven photocatalytic activity was constructed via a facile hydrothermal-calcining method. The Ag/AgVO3/carbon-rich g-C3N4 composites displayed superior performance for the photocatalytic degradation of sulfamethiadiazole (SFZ) under solar irradiation. The optimal composite with a 10 wt% Ag/AgVO3 content showed the highest photocatalytic activity, its degradation rate constant (k) for SFZ degradation was ~13 and 30 times than that of carbon-rich gC3N4 (CCN) and Ag/AgVO3, respectively. Furthermore, & BULL;O-2(-) was identified as the most crucial reactive species in the Z-scheme photocatalysis system. The greatly improved photocatalytic activities are derived from the built-in electric field (BIEF) of CCN and efficient Z-scheme charge transfer with Ag nanoparticles as charge transmission bridge. The possible photocatalytic degradation mechanism and pathway over Ag/AgVO3/carbon-rich g-C3N4 were proposed based on LC-MS analysis and density functional theory (DFT) calculation, and the toxicity of intermediates was evaluated by Quantitative structure-activity relationship (QSAR) based prediction. In summary, this work provides new insight into constructing highly efficient Z-scheme photocatalyst, which is promising for implementation in surface water remediation.