摘要
通过简单可控的电沉积方法制备了一种高性能MnO_(2)包覆Ti基电催化膜(MnO_(2)/Ti)。系统地表征了所制备的MnO_(2)/Ti膜形貌、元素含量、价态分布和电化学阻抗以及循环伏安交流测试,并考察了流速和电流密度对MnO_(2)/Ti膜水处理性能的影响。结果表明,MnO_(2)均匀分布在Ti膜表面,电沉积MnO_(2)可以显著提高Ti膜电化学活性,增强Ti膜电催化氧化性能,从而提升Ti膜自清洁能力。在电流密度为10 mA/cm^(2),流速为1.5 mL/min的工作条件下,乳化油的去除率高达91%。此外,MnO_(2)/Ti膜具有良好的稳定性和可重复使用性能。氧化机理表明,MnO_(2)/Ti膜在电催化处理过程中具有直接和间接氧化活性,MnO_(2)涂层可提高Ti膜的直接氧化能力和·OH、O_(2)^(·-)产量。
A high-performance MnO_(2)-coated Ti-based electrocatalytic membrane(MnO_(2)/Ti) was prepared by a simple and controllable electrodeposition method.The morphology,elemental content,valence distribution and electrochemical impedance of the prepared MnO_(2)/Ti membrane were systematically characterized,as well as cyclic voltammetric AC tests.The effects of flow rate and current density on the water treatment performance of the MnO_(2)/Ti membrane were investigated.The results showed that MnO_(2) was uniformly distributed on the surface of Ti membrane,and electrodeposition MnO_(2) can significantly improve the electrochemical activity and enhance the electrocatalytic oxidation performance of Ti membrane,which could improve the self-cleaning ability of Ti membrane.The emulsified oil removal efficiency was as high as 91% under the operating conditions with current density of 10 mA/cm^(2) and flow rate of 1.5 mL/min.In addition,the MnO_(2)/Ti membrane showed good stability and reusability.The oxidation mechanism showed that the MnO_(2)/Ti membranes had direct and indirect oxidation activities during the electrocatalytic treatment process,and MnO_(2) coating could improve the direct oxidation capacity and ·OH,O_(2)^(·-)yields of the Ti membrane.
作者
刘宝林
谢陈鑫
钱光磊
周立山
张程蕾
朱令之
LIU Baolin;XIE Chenxin;QIAN Guanglei;ZHOU Lishan;ZHANG Chenglei;ZHU Lingzhi(School of Chemical Engineering,Hebei University of Technology,Tianjin 300401,China;CenerTech Tianjin Chemical Research and Design Institute Co.,Ltd.,Tianjin 300131,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2024年第5期177-184,共8页
Industrial Water Treatment
关键词
多孔钛膜
膜电极
电催化膜
乳化油
porous titanium membrane
membrane electrode
electrocatalytic membrane
emulsified oil
