Abstract Construction of heterojunctions is a promising and solid strategy to tune the photocatalytic performance of BiOCl. In this work, flower-like BiOBr/BiOCl heterojunctions (IL-BiOCl) was in situ prepared by N-ethylpyridinium bromide ([BPy]Br) assisted one-step hydrothermal method. The samples were studied by a serials method. The results exhibit that [BPy]Br promotes the specific surface area and the separation rate of photoinduced carriers. Energy dispersive spectrometer (EDS) and high resolution transmission electron microscopy (HRTEM) results firmly reveal that BiOBr/BiOCl heterojunctions were successfully constructed. [BPy]Br provides Br source for BiOBr and influences the shape of the IL-BiOCl. Photocatalytic activity of the samples were evaluated, the results reveal that IL-BiOCl possesses higher photocatalytic activity than BiOCl toward decomposition of rhodamine B (RhB) under simulated sunlight irradiation.

中文翻译：

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离子液体辅助一步水热法制备花状BiOBr/BiOCl异质结的光催化性能提高

摘要 异质结的构建是调节 BiOCl 光催化性能的一种有前途且可靠的策略。在这项工作中，采用N-乙基溴化吡啶鎓（[BPy]Br）辅助一步水热法原位制备了花状BiOBr/BiOCl异质结（IL-BiOCl）。通过系列方法研究样品。结果表明[BPy]Br促进了光生载流子的比表面积和分离率。能谱仪 (EDS) 和高分辨率透射电子显微镜 (HRTEM) 结果明确表明 BiOBr/BiOCl 异质结已成功构建。[BPy]Br 为 BiOBr 提供 Br 源并影响 IL-BiOCl 的形状。评价样品的光催化活性，