Abstract: Zn/Fe metal organic framework material(Zn/Fe-MOFs) has been prepared by solvent-thermal method,and bimetal catalyst ZnO/Fe₃O₄@C obtained by further carbonization. The efficiency of ZnO/Fe₃O₄@C catalyzed persulfate (PS) for the degradation of acid orange7(AO7) has been investigated. The results show that the ZnO/Fe₃O₄@C can effectively catalyze PS and degrade AO7. When ZnO/Fe₃O₄@C dosage is 0.150 g/L,PS dosage 1.25 mmol/L,and AO7 concentration 20 μmol/L,the removing rate of AO7 can reach 98.09%. Acidic environment is more advantageous to the reaction of PS+ZnO/Fe₃O₄@C system. It is proved that the degradation of AO7 is mainly a result of the combined action of SO₄^·- and·OH.

Key words: persulfate, acid orange 7, metal organic frameworks, catalysis, free radicals

摘要： 采用溶剂热法制备了锌铁金属有机骨架材料（Zn/Fe-MOFs），碳化得到ZnO/Fe₃O₄@C双金属催化剂。研究了ZnO/Fe₃O₄@C催化过二硫酸盐（PS）降解酸性橙7（AO7）的效能，结果表明，ZnO/Fe₃O₄@C可有效催化PS降解AO7。当ZnO/Fe₃O₄@C投量、PS投量、AO7浓度分别为0.150 g/L、1.25 mmol/L、20 μmol/L时，AO7去除率可达98.09%。酸性环境更有利于PS+ZnO/Fe₃O₄@C体系的反应。AO7的降解主要是SO₄^·-和·OH共同作用的结果。

关键词: 过二硫酸盐, 酸性橙7, 金属有机骨架材料, 催化, 自由基

CLC Number: 

• X703

• TQ426.82