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Preparation of MnO2-TiO2/ceramic membrane and study on catalytic ozone degradation of phenol

Authors： ZHANG Jianyu，WANG Hong

Units： 1.State Key Laboratory of Separation Membrane and Membrane Processes，National Center for International Joint Research on Separation Membranes，School of Material Science and Engineering，Tiangong University，Tianjin 300387，China

KeyWords： MnO2-TiO2/CM; ozone; phenol; catalytic ozone oxidation

ClassificationCode：TQ520.9

year,volume(issue):pagination： 2023,43(6):44-52

Abstract：

The ceramic membranes were constructed with catalytic functional layers to improve their catalytic ozone performance. In this paper, TiO2 rod/ceramic membrane (Tir/CM) was prepared by hydrothermal method with commercial ceramic membrane as the base membrane (CM) and loaded with titanium dioxide nanorods, and then MnO2-TiO2 rod/ceramic membrane (MnO2-TiO2/CM) was prepared by sol-gel method with Tir/CM as the carrier loaded with manganese dioxide particles. The surface morphology and chemical crystallography of CM, Tir/CM and MnO2-TiO2/CM were analyzed by field emission scanning electron microscopy (FESEM) and X-ray diffractometer (XRD), and the microscopic morphology of MnO2-TiO2 nanorods was observed and analyzed by transmission electron microscopy (TEM), and the elemental valence state of MnO2-TiO2/CM was analyzed by X-ray diffraction photoelectron spectroscopy (XPS), and MnO2-TiO2/CM was used as ozone catalytic membrane to construct the catalytic ozone reactor was used to treat phenol wastewater, and the effects of different process parameters on phenol removal were investigated, while the mineralization effects of different reaction types on phenol were compared. The results showed that the MnO2-TiO2/CM was successfully prepared, in which the TiO2 nanorods were rutile in shape; under the conditions of phenol concentration of 40 mg/L, pH of 9.0 and ozone dosing of 4.8 mg/L, the MnO2-TiO2/CM catalytic ozone degradation of phenol had the best effect and had good stability in use.

Funds：

国家重点研发计划项目（2020YFA0211002）

AuthorIntro：

张建宇（1997-），男，山东济宁人，硕士生，主要研究方向为陶瓷膜催化臭氧处理废水.

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