In this work, a novel Mn_xZn_1-xFe₂O₄/C/Zn_0.8Cd_0.2S (ZCMC) magnetic composite photocatalyst used carbon-coated Mn_xZn_1-xFe₂O₄ as a magnetic substrate is fabricated successfully via a facile hydrothermal process and chemical precipitation method. The structure characterization and photocatalytic activity of the composite are explored. The results show that the prepared ZCMC samples exhibit excellent photocatalytic ability for rhodamine B (RhB) decomposition in 90 min under simulated sunlight, and the RhB degradation is above 90% when Mn_xZn_1-xFe₂O₄/C accounts for 5%–25%. Notably, the ZCMC containing 20% magnetic matrix appears remarkable recyclability and stability, and the RhB degradation is higher than 85% within 90 min after five recycles. The outstanding photocatalytic performance for ZCMC is mainly responsible for the larger specific surface area (169.1 m² g⁻¹) and excellent separation efficiency of photogenerated charge. Furthermore, the trapping experiments disclose that •O₂⁻ radicals are the dominant active species, followed by •OH and h⁺ during RhB degradation. The possible photocatalytic mechanism for RhB degradation is discussed.

在这项工作中，制造了一种新型的Mn _x Zn _{1- x} Fe ₂ O ₄ / C / Zn _0.8 Cd _0.2 S（ZCMC）磁性复合光催化剂，该催化剂使用碳包覆的Mn _x Zn _{1- x} Fe ₂ O ₄作为磁性基质。通过简便的水热工艺和化学沉淀法成功地获得了成功。探索了复合材料的结构表征和光催化活性。结果表明，所制备的ZCMC样品在模拟阳光下90分钟内对罗丹明B（RhB）的分解具有良好的光催化能力，当Mn _x时，RhB降解率达到90％以上。Zn _{1- x} Fe ₂ O ₄ / C占5％–25％。值得注意的是，含有20％磁性基质的ZCMC表现出显着的可回收性和稳定性，并且在五个回收后90分钟内RhB的降解率高于85％。ZCMC出色的光催化性能主要是由于其较大的比表面积（169.1 m ²  g ^-1）和优异的光生电荷分离效率。此外，捕集实验披露•ø ₂ ^-自由基是主要活性物质，其次是•OH和H ⁺罗丹明B降解过程。讨论了可能的光催化降解RhB的机理。