文献类型：期刊文献

英文题名：Simultaneous enhancements of light-harvesting and charge transfer in UiO-67/CdS/rGO composites toward ofloxacin photo-degradation

作者：Zhang, Shenping[1];Wang, Yimeng[1];Cao, Zan[2];Xu, Jian[3];Hu, Jun[1];Huang, Yuan[1];Cui, Changzheng[2];Liu, Honglai[1];Wang, Hualin[2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Environm Protect Key Lab Environm Risk Assessment, Sch Resources & Environm Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Shanghai Inst Measurement & Testing Technol, 1500 Zhang Heng Rd, Shanghai 201203, Peoples R China

年份：2020

卷号：381

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20193807442856);WOS:【SCI-EXPANDED(收录号:WOS:000499066900079)】；

基金：This work is supported by the National Natural Science Foundation of China (Nos., 91834301, 21676080, 21878076), the National Water Pollution Control and Management Technology Major Projects (No. 2017ZX07402003).

语种：英文

外文关键词：UiO-67 composites; Photocatalysis Light-harvesting; Charge transfer; Ofloxacin

摘要：Antibiotics residues in aquatic environments has aroused great public concern since they cannot be effectively removed by conventional biological degradation. Sunlight-driven photo-degradation has been recognized as one of most efficient approach for the antibiotics removal. Herein, we proposed a novel strategy of simultaneous light-harvesting and electron-relay-penetration for the photocatalytic degradation of target antibiotics of ofloxacin (OFL). By incorporating visible-light responded semiconductor CdS nanoparticles into MOF and encapsulating by excellent conductor rGO thin sheets, a series of mesoporous composites of UiO-67/CdS/rGO-x were developed. As a result, the obtained UiO-67/CdS/ rGO-1 showed the highest OFL degradation efficiency of 93.4% within 30 min for a 10 ppm OFL solution under the simulated sunlight, in which the turnover frequency (TOF) of 5.44x10(-3) g(OFL) min(-1) g(Cat.)(-1) showed an order of magnitude increase over the relevant works. The mechanism study revealed the superoxide radicals center dot O-2(-) and photo-generated hole h(+) were the excitons for the photocatalytic oxidation. The equalized Fermi level of UiO-67/CdS heterojunctions was formed to facilitate the electrons relaying, spilling-over, and penetrating through wrapped thin-layered rGO; meanwhile, the selective adsorption of OFL synergistically enhanced the photocatalysis, and hence provided a promising strategy for environmental remediation.