In this work, a novel magnetic ZnFe₂O₄/Bi⁰-Bi₂MoO₆ with Z-scheme heterojunction photocatalyst was successfully synthesized via a solvothermal-liquid phase reduction method. The structure, composition, morphology and optical property of the ternary photocatalyst were characterized. All the ZnFe₂O₄/Bi⁰-Bi₂MoO₆ composites with different ZnFe₂O₄ content showed enhanced visible-light photocatalytic activity for tetracycline hydrochloride (TC) degradation compared to pure Bi₂MoO₆ and Bi⁰-Bi₂MoO₆. The maximum degradation rate for TC via 30%-ZnFe₂O₄/Bi⁰-Bi₂MoO₆ reached 86.32% after 60 min reaction, and its kinetic constant is about 6.44 times that of Bi₂MoO₆. Meanwhile, the ternary catalyst also has salt resistance and alkali resistance, and it also has good photocatalytic activity for several antibiotics. Besides, ZnFe₂O₄/Bi⁰-Bi₂MoO₆ was easy to be separated by an external magnetic field and steadily reused for several times. The characterization indicated that the improved activity of ZnFe₂O₄/Bi⁰-Bi₂MoO₆ was mainly due to the formation of heterojunction and the surface plasmon resonance (SPR) effect, resulting in the wider spectrum response range, more stable structure and lower recombination rate of electron-hole pair. Trapping experiments and SPR tests showed that h⁺ and •O₂^- were the main active substances in the process of degrading TC by ZnFe₂O₄/Bi⁰-Bi₂MoO₆. Additionally, a possible Z-scheme heterojunction electron transfer mechanism was proposed. This work provide an idea for the use of magnetic photocatalysts with recycling stability to treat TC.

在这项工作中，通过溶剂热-液相还原法成功地合成了一种具有Z型异质结光催化剂的新型磁性ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO ₆。表征了三元光催化剂的结构、组成、形貌和光学性能。与纯 Bi ₂ MoO ₆相比，所有具有不同 ZnFe ₂ O ₄含量的 ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO ₆复合材料对四环素盐酸盐 (TC) 的降解表现出增强的可见光光催化活性和Bi ⁰ -Bi ₂ MoO ₆。30%-ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO ₆对TC的最大降解率在60分钟后达到86.32%，其动力学常数约为Bi ₂ MoO _{6 的}6.44倍。同时，三元催化剂还具有耐盐性和耐碱性，对几种抗生素也具有良好的光催化活性。此外，ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO ₆易被外磁场分离，可多次稳定重复使用。表征表明，ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO ₆活性的提高主要是由于异质结的形成和表面等离子体共振（SPR）效应，导致更宽的光谱响应范围、更稳定的结构和较低的电子-空穴对复合率。捕集实验和SPR测试表明，h ⁺和•O ₂ ^-是ZnFe ₂ O ₄ /Bi ⁰ -Bi ₂ MoO降解TC过程中的主要活性物质₆ . 此外，还提出了一种可能的 Z 型异质结电子转移机制。这项工作为使用具有循环稳定性的磁性光催化剂处理 TC 提供了思路。