Fabrication of Bi2Sn2O7@MIL-100(Fe) composite photocatalyst with enhanced superoxide-radical-dominated photocatalytic activity for ciprofloxacin degradation

被引：31
作者：
Wu, Chenyan [1 ]
Shen, Qianhong [1 ,2 ,3 ]
Zheng, Suhua [1 ]
Zhang, Xinyu [1 ]
Sheng, Jiansong [2 ]
Yang, Hui [1 ,2 ,3 ]
机构：
[1] Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Zhejiang California Int NanoSyst Inst, Hangzhou 310058, Peoples R China
[3] ZJU Hangzhou Global Sci & Technol Innovat Ctr, Hangzhou 311215, Peoples R China
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2022年 / 1258卷
关键词：
MIL-100(Fe); Bi2Sn2O7; superoxide radicals; Ciprofloxacin; Photocatalysis; NANOCOMPOSITE; G-C3N4; PHOTODEGRADATION; MIL-100(FE); NANOSPHERE; NITRIDE; WATER;
D O I：
10.1016/j.molstruc.2022.132657
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel Bi2Sn2O7@MIL-100(Fe) composite photocatalyst was fabricated by loading Bi2Sn2O7 nanoparticles on the surface of mesoporous MIL-100(Fe). The structure-property relationships of such composite photo catalyst were studied. The results exhibit that the formed Bi2Sn2O7@MIL-100(Fe) heterojunction promote the separation of photo-generated carriers, leading to the enrichment of photo-generated electrons on MIL-100(Fe). Meanwhile, MIL-100(Fe) can provide more active sites for photocatalytic reaction due to its extraordinary specific surface area. Therefore, the Bi2Sn2O7@MIL-100(Fe) composite photocatalyst exhibits excellent superoxide-radical-dominated photocatalytic activity and is more propitious to degrading the contaminants such as ciprofloxacin, which can be efficiently degraded in the absence of superoxide radicals. The Bi2Sn2O7@MIL-100(Fe) composite reveals enhanced photocatalytic activity for degrading ciprofloxacin with rate constant (0.0143 min(-1)) 1.96 and 3.86 times higher than that of pure MIL-100(Fe) (0.0073 min(-1)) and pure Bi2Sn2O7 (0.0037 min(-1)), respectively. (C)& nbsp;2022 Elsevier B.V. All rights reserved.
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页数：9
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