Preparation of BiOBrxCl1-x solid solution photocatalyst with oxygen vacancies for degradation of methyl orange under simulated sunlight

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2024-04-16 DOI:10.1002/jccs.202300455

Kunhua Ren, Fubo Shao, Hui Li, Xiqiang Mao, Jian Yang, Ximei Fan

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Abstract

BiOBr_xCl_1-x solid solution with oxygen vacancies was synthesized using a simple one-step hydrothermal method. The sample was characterized using comprehensive characterization techniques, and the results showed that the solid solution material was successfully prepared. Adjusting the relative proportion of halogens in BiOBr_xCl_1-x solid solution has a significant impact on the morphology, optical properties, and photocatalytic activity of the sample, and oxygen vacancies are introduced into the material. The presence of oxygen vacancies improves the separation efficiency of charge carriers and facilitates the activation of oxygen molecules into superoxide radicals. Among them, BiOBr_0.2Cl_0.8 showed flower-like microspheres morphology and exhibited the best photocatalytic activity. After 30 min of dark adsorption and 1 h of simulated sunlight exposure, the removal rate of methyl orange (MO) was 92.5%, which was 2.38 times higher than that of pure BiOBr (38.9%) and 2.09 times higher than that of pure BiOCl (44.3%), respectively.

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制备含氧空位的 BiOBrxCl1-x 固溶体光催化剂，用于在模拟阳光下降解甲基橙

采用简单的一步水热法合成了含氧空位的 BiOBrxCl1-x 固溶体。采用综合表征技术对样品进行了表征，结果表明该固溶体材料制备成功。调整 BiOBrxCl1-x 固溶体中卤素的相对比例会对样品的形貌、光学性质和光催化活性产生显著影响，并在材料中引入氧空位。氧空位的存在提高了电荷载流子的分离效率，有利于氧分子活化成超氧化物自由基。其中，BiOBr0.2Cl0.8 呈花朵状微球形态，光催化活性最好。在暗吸附 30 分钟和模拟阳光照射 1 小时后，甲基橙（MO）的去除率为 92.5%，分别是纯 BiOBr（38.9%）和纯 BiOCl（44.3%）的 2.38 倍和 2.09 倍。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.

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