司帕沙星
双模
降级(电信)
光催化
对偶(语法数字)
异质结
电荷(物理)
材料科学
光电子学
方案(数学)
化学
电子工程
计算机科学
物理
电信
工程类
催化作用
艺术
数学分析
生物化学
氧氟沙星
文学类
数学
量子力学
环丙沙星
抗生素
作者
Han Sun,Lei Wang,Xudong Wang,Yushu Dong,Ji‐Chang Ren,Jianguo Xin,Ruosong Jing,Jiajun An
标识
DOI:10.1016/j.jece.2024.112386
摘要
The novel dual S-scheme WO3/ZnIn2S4/CoWO4 heterojunction was formed by loading WO3 and CoWO4 onto ZnIn2S4 (ZIS) using a simple two-step hydrothermal method. Sparfloxacin (SPX) degradation rate constant of WO3/ZnIn2S4/CoWO4 heterojunction reached 0.0312 min−1, which was nearly 26-, 8.4- 34.7-, and 1.6- fold greater than those of WO3, ZIS, CoWO4, and WO3/ZIS, respectively. The multi-charge transfer and separation mechanism of dual S-scheme heterojunction photocatalysts is deeply explored by experiments and density functional theory: the carriers moved in reverse contributed to an interfacial heterotropic built-in electric field, which accelerated the photogenerated carriers’ separation and interfacial transfer ability and lifetime. Further, no recombined electrons and holes with higher reducing and oxidizing properties produced more •O2−, h+ and •OH, which could attack the active atoms of SPX with a high Fukui index. By combining with liquid chromatography mass spectrometry-ion trap-time of flight, plausible SPX degradation intermediates, pathways and mechanisms were presented. SPX was degraded into humic acid-like intermediates, and its environmental risk was significantly reduced. This paper offers insight into developing a novel ZIS-based dual S-scheme heterojunction strategy for solving environmental issues.
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