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首页> 外文期刊>RSC Advances >One-pot synthesis of heterostructured Bi2S3/BiOBr microspheres with highly efficient visible light photocatalytic performance
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One-pot synthesis of heterostructured Bi2S3/BiOBr microspheres with highly efficient visible light photocatalytic performance

机译：一锅合成具有高效可见光光催化性能的Bi2S3 / BiOBr异质结构微球

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摘要

To overcome the drawback of low photocatalytic efficiency brought by fast electron-hole recombination and narrow photoresponse range, the heterostructured Bi2S3/BiOBr microspheres were designed and synthesized via a facile one-pot solvothermal method. The as-prepared heterostructured Bi2S3/BiOBr photocatalyst exhibits significantly enhanced photoelectrochemical performance and photocatalytic activity for decomposing rhodamine B (RhB) and Brilliant ponceau 5R (BP) compared with pure BiOBr under visible light irradiation, which could be mainly attributed to the formation of a heterojunction in the Bi2S3/BiOBr interface, which can efficiently facilitate the separation of photogenerated electron-hole pairs. Furthermore, a terephthalic acid photoluminescence (TA-PL) probing test and radical trapping experiments demonstrate that the h(+) and center dot O2- radicals are the dominant reactive species while center dot OH radicals could be neglected. In addition, the possible enhanced photocatalytic mechanism is proposed on the basis of the calculated energy band positions and radical trapping experiments.
机译：为了克服电子-空穴快速复合带来的光催化效率低和光响应范围窄的缺点，通过一种简便的一锅溶剂热法设计并合成了异质结构的Bi2S3 / BiOBr微球。制备的异质结构Bi2S3 / BiOBr与纯BiOBr相比，在可见光照射下具有更好的分解若丹明B（RhB）和Brilliant ponceau 5R（BP）的光电化学性能和光催化活性，这主要归因于形成了Bi2S3 / BiOBr界面中的异质结，可以有效地促进光生电子-空穴对的分离。此外，对苯二甲酸光致发光（TA-PL）探测测试和自由基捕获实验表明，h（+）和中心点O2-自由基是主要的反应性物种，而中心点OH自由基则可以忽略。此外，根据计算出的能带位置和自由基俘获实验，提出了可能的增强光催化机理。

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