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构建用于高效可见光降解四环素类药物的BiWO/BiVO光催化体系。

Construction of a BiWO/BiVO photocatalytic system for efficient visible light degradation of tetracycline drugs.

作者信息

Zhang Yiyao, Song Hongchen, Han Jintai, Liu Yunchao, Sun Jing, Shen Tingting, Wang Xikui, Wang Zhen, Zhang Weizhen, Yao Xuerui

机构信息

School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 PR China

Shangdong Haijingtian Environmental Protection Technology Stock Company Binzhou 256600 PR China.

出版信息

RSC Adv. 2023 Jan 25;13(6):3612-3622. doi: 10.1039/d2ra07460e. eCollection 2023 Jan 24.

DOI:10.1039/d2ra07460e
PMID:36756596
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9890608/
Abstract

A BiWO/BiVO composite photocatalytic material was synthesized by the hydrothermal method, and achieved the effective degradation of oxytetracycline (OTC) and tetracycline (TC) under visible light. The compositions, structures, chemical states and optoelectronic properties of BiWO, BiVO and BiWO/BiVO composites were characterized by systematic characterization. The results show that the existence of the heterojunction interface facilitates the separation of photogenerated carriers. Compared with the pure catalyst of BiWO and BiVO, the BiWO/BiVO composite material significantly improves the degradation efficiency of OTC and TC. The degradation rate is 6.22 and 3.02 times higher than that of BiWO and BiVO, respectively. Through the free radical quenching experiments, it is known that photogenerated holes (h) and superoxide anion free radicals (·O ) are the main active substances in the degradation of OTC. By analyzing the process of photocatalytic degradation of OTC, there are mainly six intermediates during the process. Their possible degradation pathways are also inferred in this paper.

摘要

采用水热法合成了BiWO/BiVO复合光催化材料，并在可见光下实现了对土霉素（OTC）和四环素（TC）的有效降解。通过系统表征对BiWO、BiVO和BiWO/BiVO复合材料的组成、结构、化学状态和光电性质进行了表征。结果表明，异质结界面的存在促进了光生载流子的分离。与BiWO和BiVO纯催化剂相比，BiWO/BiVO复合材料显著提高了OTC和TC的降解效率。降解率分别比BiWO和BiVO高6.22倍和3.02倍。通过自由基猝灭实验可知，光生空穴（h）和超氧阴离子自由基（·O ）是OTC降解过程中的主要活性物质。通过分析OTC的光催化降解过程，该过程中主要有六种中间体。本文还推断了它们可能的降解途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/65266250489e/d2ra07460e-f13.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/246a623abcf2/d2ra07460e-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/404e41e29a46/d2ra07460e-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/e705fb4ce035/d2ra07460e-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/f149728d1a3c/d2ra07460e-f10.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/35c6b968a316/d2ra07460e-f11.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6737/9890608/65266250489e/d2ra07460e-f13.jpg

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