Photocatalytic degradation of tetracycline antibiotic over a flower-like S-doped BiOBr: Performance, mechanism insight and toxicity assessment

IF 4.1 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Jianghua Huang, C. Li, Huadong Hao, L. Li, Baikang Zhu, Xianlei Chen, Hengcong Tao
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引用次数: 0

Abstract

A new catalyst of S-BiOBr flower-like morphology was synthesized by simple pyrolysis and further used for photocatalytic degradation of TC. Phase structure analysis, elemental analysis and micromorphological analysis confirmed that S doping has a reinforcing effect on the polarization between the [Bi2O2S]2+ and [Br2]2- layers and is conducive to interlayer polarization and rapid charge transfer. In addition, its unique petal morphology is more favorable to the adsorption of contaminants on its surface and accelerates the reaction of catalyst surfactant with contaminants. It was also found that S-BiOBr degrades TC significantly better than single BiOBr@HCs, with up to 99.1% in 60 min illumination. In addition, the S-BiOBr catalyst has good reusability in antibiotic degradation. The results of photocatalytic mechanism analysis show that free radical O2 − plays a major role in the photodegradation of organic model pollutants. Intermediates in TC degradation were identified, and their potential degradation pathways were prospected, and the toxicity development of TC in the degradation process was analyzed by toxicity assessment software. The S-BiOBr photocatalytic system developed in this paper provides a new idea for effective modification of bismuth-based semiconductors and has important guiding significance for future water purification.
花状s掺杂BiOBr光催化降解四环素抗生素:性能、机制和毒性评估
通过简单热解合成了一种新型的S-BiOBr花状催化剂,并进一步用于TC的光催化降解。相结构分析、元素分析和微观形貌分析证实,S掺杂对[Bi2O2S]2+和[Br2]2-层之间的极化具有增强作用,有利于层间极化和快速电荷转移。此外,其独特的花瓣形态更有利于污染物在其表面的吸附,加速了催化剂表面活性剂与污染物的反应。研究还发现,S-BiOBr对TC的降解效果明显好于单一BiOBr@HCs,在60分钟的光照下高达99.1%。此外,S-BiOBr催化剂在抗生素降解中具有良好的可重复使用性。光催化机理分析结果表明,自由基O2−在有机模型污染物的光降解中起着重要作用。对TC降解过程中的中间体进行了鉴定,并对其潜在的降解途径进行了展望,并利用毒性评价软件对TC在降解过程中产生的毒性发展进行了分析。本文开发的S-BiOBr光催化体系为铋基半导体的有效改性提供了新的思路,对未来的水净化具有重要的指导意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Frontiers in Nanotechnology
Frontiers in Nanotechnology Engineering-Electrical and Electronic Engineering
CiteScore
7.10
自引率
0.00%
发文量
96
审稿时长
13 weeks
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