Facile synthesis of a novel Ag 3 PO 4 /MIL-100(Fe) Z-scheme photocatalyst for enhancing tetracycline degradation under v
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RESEARCH ARTICLE
Facile synthesis of a novel Ag3PO4/MIL-100(Fe) Z-scheme photocatalyst for enhancing tetracycline degradation under visible light Jun Xu 1 & Jinmei Xu 2 & Shanqing Jiang 1 & Yu Cao 1 & Kailin Xu 1 & Qiuya Zhang 1 & Liping Wang 1,2 Received: 18 April 2020 / Accepted: 26 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this work, a novel visible light–driven heterostructure Ag3PO4/MIL-100(Fe) composite photocatalyst was successfully synthesized via facile chemical deposition method at room temperature. Especially when the mass ratio of Ag3PO4 was 20% of MIL100(Fe) (APM-2), it displayed the best photocatalytic performance, for which the degradation rate of tetracycline (TC) in conventional environment was 6.8 times higher than that of bare MIL-100(Fe). In addition, the effects of the initial concentration and pH of the solution on the degradation of tetracycline were also studied, and the results showed that the degradation of tetracycline was more favorable in a weakly alkaline environment. The excellent performance of Ag3PO4/MIL-100(Fe) composites was attributed to the fact that on the basis of having adequate photocatalytic active sites, modifying MIL-100(Fe) with an appropriate amount of Ag3PO4 particles can more effectively separate photogenerated electron–hole pairs. Five cycles of experiments showed that APM-2 has good photostability. Lastly, it was proved through quenching experiments that •O2−, h+, and •OH all played corresponding roles in the degradation process, and a possible Z-scheme heterostructure photocatalytic degradation mechanism was proposed. Keywords Visible-light . Photocatalysis . Ag3PO4/MIL-100(Fe) . Tetracycline . Z-scheme
Introduction The use of antibiotics is almost inseparable in the rapid development of modern society. As one of the most widely used broad-spectrum antibiotics, tetracycline is extensively used in the medical industry and animal breeding industry
(Rodriguez-Mozaz et al. 2015). However, 50% of tetracycline cannot be completely absorbed by humans or animals and eventually flows into the water environment to cause harm to the ecological environment (Gothwal and Shashidhar 2015). Therefore, it is essential to remove tetracycline antibiotic residues from the environment. So far, various techniques
Responsible Editor: Santiago V. Luis Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11356-020-09903-w) contains supplementary material, which is available to authorized users. * Shanqing Jiang [email protected]
Kailin Xu [email protected]
* Liping Wang [email protected]
Qiuya Zhang [email protected]
Jun Xu [email protected] Jinmei Xu [email protected] Yu Cao [email protected]
1
School of Environmental & Safety Engineering, Changzhou University, Changzhou 213164, China
2
Changzhou University Huaide College, Jingjiang 214500, China
Environ Sci Pollut Res
have been carried out for the treatment of antibiotics in aqueous solution, mainly including adsorption, ozone
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