The poor stability of the silver-based semiconductor photocatalyst is an insurmountable problem. Coupling different proportions of AgBr and Ag₂CO₃ together by in situ reduction method produced a series of novel AgBr/Ag₂CO₃ composite photocatalysts, and was accompanied by the generation of Ag@AgBr/Ag₂CO₃ heterojunction. The effects of different ratios of AgBr and Ag₂CO₃ on the photocatalytic degradation of rhodamine B under visible light irradiation were studied by XRD, UV–Vis DRS, SEM, HRTEM, TEM and XPS characterization techniques. The best ratio and UV irradiation time were explored. In addition, the photocatalytic mechanism of the photocatalyst was described. The Ag NPs formed on the surface of AgBr/Ag₂CO₃ may be one of the reasons for effectively improving the separation efficiency of electron–hole pairs (e−−h+), accelerating dye degradation and improving photocatalytic stability.

中文翻译：

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原位还原合成Ag@AgBr/Ag2CO3异质结的光催化活性

银基半导体光催化剂稳定性差是一个难以克服的问题。通过将不同比例的 AgBr 和 Ag ₂ CO ₃偶联在一起原位还原法产生了一系列新型AgBr/Ag ₂ CO ₃复合光催化剂，并伴随着Ag@AgBr/Ag ₂ CO ₃异质结的产生。通过XRD、UV-Vis DRS、SEM、HRTEM、TEM和XPS表征技术研究了不同比例的AgBr和Ag ₂ CO ₃在可见光照射下对罗丹明B光催化降解的影响。探讨了最佳比例和紫外线照射时间。此外，还描述了光催化剂的光催化机理。_{Ag NPs 在 AgBr/Ag 2} CO ₃表面形成可能是有效提高电子-空穴对分离效率的原因之一（e--H+)，加速染料降解，提高光催化稳定性。