Abstract ZnS–ZnO–Sm2O3 (Zn–Sm–XY) composites were prepared via the high-temperature calcination of core-shell structured ZnS@Sm2O3 for the enhanced photocatalytic degradation of dyes and antibiotics in visible light region. Effects of calcined temperature, Sm2O3 content, pH value, contaminant concentration, and inorganic ions on the photocatalytic activity were investigated. Ternary Zn–Sm composites exhibit the excellent photocatalytic activity for the visible light driven degradation of tetracycline hydrochloride. Among these composites, Zn–Sm–2B prepared via the heat-treatment of ZnS–Sm2O3 at 673 K shows the best photocatalytic activity for the removal of tetracycline hydrochloride. The enhanced photocatalytic activity of Zn–Sm–2B is also achieved for the visible light driven degradation of methyl orange, methylene blue, and rhodamine B within 20 min. In addition, Zn–Sm–6C calcined from Zn–Sm–C at 1073 K as well as Zn–Sm–2B exhibits excellent photocatalytic activity. OH and O2− radicals are vital for the enhanced photocatalytic activity of Zn–Sm–2B and Zn–Sm–2B in visible light region, respectively. The lattice defects, sulfur vacancies, and oxygen vacancies facilitate the efficient charge transfer and the rapid separation of electron-hole pairs at the junction interface of Zn–Sm–2B.

中文翻译：

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ZnS-ZnO-Sm2O3复合材料在可见光区域去除染料和抗生素的增强光催化能力

摘要 ZnS-ZnO-Sm2O3 (Zn-Sm-XY) 复合材料是通过高温煅烧核壳结构的 ZnS@Sm2O3 制备的，用于增强可见光区染料和抗生素的光催化降解。研究了煅烧温度、Sm2O3 含量、pH 值、污染物浓度和无机离子对光催化活性的影响。三元Zn-Sm复合材料对可见光驱动的盐酸四环素降解表现出优异的光催化活性。在这些复合材料中，通过在 673 K 下热处理 ZnS-Sm2O3 制备的 Zn-Sm-2B 显示出最佳的去除四环素盐酸盐的光催化活性。Zn-Sm-2B 的光催化活性增强也可用于可见光驱动降解甲基橙、亚甲蓝、和罗丹明 B 在 20 分钟内。此外，由 Zn-Sm-C 在 1073 K 下煅烧的 Zn-Sm-6C 以及 Zn-Sm-2B 表现出优异的光催化活性。OH 和 O2− 自由基对于增强 Zn-Sm-2B 和 Zn-Sm-2B 在可见光区域的光催化活性至关重要。晶格缺陷、硫空位和氧空位促进了 Zn-Sm-2B 结界面处的有效电荷转移和电子-空穴对的快速分离。