As one of the most stable metal-organic frame materials(metal-organic frameworks,MOFs),UiO-66 has at-tracted extensive attention in the adsorption field.However,the use of UiO-66 is still limited by the weak electron-hole charge separation ability or the low accessibility of micropores.In this study,Fe3O4@UiO-66 was prepared by using acetic acid to construct the mesoporous defects of UiO-66 and doping Fe3O4.The doping of Fe3O4 results in the formation of de-natured mesoporous defects in UiO-66,leading to good performance on adsorption of tetracycline antibiotics.Fe3O4@UiO-66 was used to adsorb and remove common oxytetracycline(OTC)from water.The adsorption properties and mechanism of Fe3O4@UiO-66 on OTC were studied by analyzing the crystal structure and physicochemical properties of Fe3O4@UiO-66.The results show that the adsorption capacity of Fe3O4@UiO-66 was 201.72 mg·g-1,and the removal rate of OTC was 80.69％.The adsorption process conforms to the pseudo-second-order kinetics,Elovich and Langmuir isothermal adsorption model.Adsorption reaction is endothermic reaction and with entropy increase process.The increase of tempera-ture is beneficial to the adsorption.The adsorption reaction is less affected by pH.
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