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Preparation of MXene/C electrocatalytic membrane and study on degradation performance of tetracycline hydrochloride in water

Authors： WANG Hong, SHAO Yanan, YU Di, YIN Zhen

Units： State Key Laboratory of Separation Membranes and Membrane Processes, National Center for International Joint Research on Separation Membranes, Tiangong University, Tianjin 300387, China; Tianjin University of Science and Technology, College of Chemical Engineering and Materials Science, Tianjin Key Laboratory of Brine Chemical Engineering and Resource Eco-utilization, Tianjin 300457, China

KeyWords： MXene; Electrophoretic deposition; MXene/C membrane; Tetracycline hydrochloride wastewater; Electrocatalysis

ClassificationCode：TQ460.9

year,volume(issue):pagination： 2022,42(6):151-158

Abstract：

Two-dimensional MXene nanosheets were loaded on activated carbon-based microporous carbon membrane by electrophoretic deposition method to prepare MXene/C membranes. Surface micromorphology analysis of carbon membrane and MXene/C membrane by field emission scanning electron microscopy (SEM) and transmission electron microscopy (TEM), X-ray diffraction (XRD) was used for chemical crystal analysis, and X-ray diffraction photoelectron spectroscopy (XPS) was used for elemental valence analysis. The hydrophilicity of the membrane surface was analyzed using an automatic contact Angle measuring instrument, and the electrochemical performance was analyzed using an electrochemical workstation. Electrocatalytic membrane reactors (ECMR) were constructed with carbon membrane and MXene/C membrane as anodes for electrocatalytic oxidation degradation of tetracycline hydrochloride wastewater, and their degradation effects were compared. The results showed that the MXene nanosheets were successfully loaded on the surface of the carbon membrane, and the MXene/C membrane was successfully prepared. Compared with the original carbon membrane, the MXene/C membrane had better hydrophilicity, higher electrochemical activity, and higher removal efficiency of tetracycline hydrochloride. When the temperature was 20 ℃, residence time was 8 min, tetracycline hydrochloride wastewater concentration was 50 mg/L, pH was 7.0, current density of 0.6 mA/cm2 and an electrolyte Na2SO4 concentration of 15 g/L, the removal rates of tetracycline hydrochloride by carbon membrane and MXene/C membrane were 86.4% and 97.76%, respectively, and the TOC removal rates were 40.6 % and 88.57%. Meanwhile, after 10 cycles, the MXene/C membrane showed excellent stability.

Funds：

国家重点研发计划（2020YFA0211002）

AuthorIntro：

王虹（1978—），女，辽宁鞍山人，博士，副教授，主要研究方向为电催化在水处理中的应用

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