二维/一维BiOBr/Bi2O2S异质结中电荷的再分配用于光电催化氧化水中有机污染物

IF 4.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
RSC Advances Pub Date : 2025-08-21 DOI:10.1039/D5RA03795F
Kehinde D. Jayeola, Dimpo S. Sipuka, Tsholofelo I. Sebokolodi, Jonathan O. Babalola, Yumeng Zhao and Omotayo A. Arotiba
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引用次数: 0

摘要

本研究提出了一种用于降解水中有机污染物的2D/1D BiOBr/Bi2O2S p-n异质结的设计,解决了药物化合物引起的水污染问题。采用原位水热合成方法,在不同比例的Bi2O2S纳米棒上合成BiOBr纳米片,形成最大限度地分离电荷和抑制电荷复合的异质结。当BiOBr/Bi2O2S的最佳配比为20%时,与原始BiOBr和Bi2O2S相比,BiOBr/Bi2O2S异质结对环丙沙星的降解效率为88%,TOC去除率为60%。研究了光阳极在降解四环素、磺胺甲恶唑等污染物方面的应用前景。综合结构、光学和电化学分析证实,该材料的表面积和活性位点增加,光性能增强,电荷分离效果更好。自由基捕获研究发现羟基自由基是降解过程的主要因素,表明p-n异质结的形成促进了空间电荷区。本研究确定了BiOBr/Bi2O2S作为PEC水处理的有效光阳极,为减少水中有机污染物的检测提供了一种有前途的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Redistribution of charge in a 2D/1D BiOBr/Bi2O2S heterojunction for the photoelectrocatalytic oxidation of organic pollutants in water

Redistribution of charge in a 2D/1D BiOBr/Bi2O2S heterojunction for the photoelectrocatalytic oxidation of organic pollutants in water

This study presents the design of a 2D/1D BiOBr/Bi2O2S p–n heterojunction developed for the degradation of organic pollutants in water, addressing the issue of water contamination caused by pharmaceutical compounds. In an in situ hydrothermal synthesis method, the BiOBr nanosheets were synthesised on Bi2O2S nanorods in varying ratio to form a heterojunction that maximises charge separation and suppressed charge recombination. At an optimal 20% Bi2O2S ratio, BiOBr/Bi2O2S heterojunction achieved 88% degradation efficiency of ciprofloxacin and TOC removal of 60%, when compared with the pristine BiOBr and Bi2O2S. The wider application of the photoanode was investigated by degrading other pollutants like tetracycline and sulfamethoxazole. Comprehensive structural, optical, and electrochemical analyses confirmed the increased surface area and active sites, enhanced light properties and better charged separation. The radical trapping studies identified the hydroxyl radical as a primary contributor to the degradation process, indication the p–n heterojunction facilitated by the formation of a space charge region. This study establishes the BiOBr/Bi2O2S as an effective photoanode for PEC water treatment and provides a promising approach to mitigate organic pollutant detection in water.

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来源期刊
RSC Advances
RSC Advances chemical sciences-
CiteScore
7.50
自引率
2.60%
发文量
3116
审稿时长
1.6 months
期刊介绍: An international, peer-reviewed journal covering all of the chemical sciences, including multidisciplinary and emerging areas. RSC Advances is a gold open access journal allowing researchers free access to research articles, and offering an affordable open access publishing option for authors around the world.
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