In this research, ZnFe₂O₄ was employed as heterogeneous catalyst for the degradation of tetracycline hydrochloride (TCH) by a novel combined microwave-induced (MW-induced) and photocatalytic oxidation. The ZnFe₂O₄ catalyst was synthesized using co-precipitation method, and characterized by XRD, TEM, BET and UV–Vis DRS. A microwave electrodeless discharge lamp (MEDL) was introduced to this process as a light source. 91.6% of TCH degradation was obtained in MW/MEDL/ZnFe₂O₄ system in 4 min. ZnFe₂O₄ catalyst had both microwave-catalytic and visible-light photocatalytic activities. The operation parameters, such as microwave output, catalyst dosage, initial pH and recycle runs, showed different influence on TCH degradation. The analysis of degradation mechanism indicated that h⁺ was the main active species for TCH degradation and little O₂^−• active species generated in MW/MEDL/ZnFe₂O₄ system. The decomposition intermediates of TCH were identified by LC-MS.

在这项研究中，ZnFe ₂ O ₄被用作新型的微波诱导（MW诱导）和光催化氧化组合降解盐酸四环素（TCH）的非均相催化剂。采用共沉淀法合成了ZnFe ₂ O ₄催化剂，并通过XRD，TEM，BET和UV-Vis DRS对其进行了表征。微波无电极放电灯（MEDL）作为光源引入了该工艺。在MW / MEDL / ZnFe ₂ O ₄系统中，在4分钟内获得了91.6％的TCH降解。ZnFe ₂ O ₄该催化剂具有微波催化和可见光光催化活性。微波输出量，催化剂用量，初始pH值和循环运行等操作参数对TCH降解表现出不同的影响。降解机理分析表明，h ⁺是TCH降解的主要活性种，在MW / MEDL / ZnFe ₂ O ₄体系中几乎没有O _2- ^•活性种产生。通过LC-MS鉴定了TCH的分解中间体。