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催化臭氧的MnO2-TiO2/陶瓷膜制备及其降解苯酚性能

作者：张建宇，王虹，张伟

单位： 1．天津工业大学分离膜与膜过程国家重点实验室，材料科学与工程学院，分离膜科学与技术国际联合研究中心，天津300387

关键词： MnO2-TiO2/CM；臭氧；苯酚；催化臭氧氧化

DOI号：

分类号： TQ520.9

出版年,卷(期):页码： 2023,43(6):44-52

摘要：

对陶瓷膜进行催化功能层的构建，以提高其催化臭氧性能。以商业陶瓷膜为基膜（CM），采用水热法负载二氧化钛纳米棒，制备TiO2棒/陶瓷膜（Tir/CM）；再通过浸渍法以Tir/CM为载体负载二氧化锰颗粒，制备MnO2-TiO2棒/陶瓷膜（MnO2-TiO2/CM）。采用场发射扫描电子显微镜（FESEM）、X射线衍射仪（XRD）透射电子显微镜（TEM）和X射线衍射光电子能谱仪（XPS）等手段对改性陶瓷膜进行形貌及物相分析，以MnO2-TiO2/CM为臭氧催化膜构建催化臭氧反应器用于处理苯酚废水，研究了不同工艺参数对苯酚去除效果的影响，同时对比了不同反应类型对苯酚的矿化效果。结果表明：成功制备出MnO2-TiO2/CM，其中TiO2纳米棒呈金红石型；在苯酚质量浓度为40 mg/L，pH值为9.0，臭氧投加量为4.8mg/L的条件下，MnO2-TiO2/CM催化臭氧降解苯酚效果最佳，且具有较好的使用稳定性。

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.

基金项目：

国家重点研发计划项目（2020YFA0211002）

作者简介：

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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