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Bi-SnO2/GO电催化膜的制备及其性能研究

作者：李雪燕，邓宇，赵蕾，邓橙，郝丽梅，刘红斌，朱孟府

单位： 1 天津科技大学化工与材料学院，天津 300457；2 军事科学院卫勤保障技术研究所，天津 300161

关键词：电催化膜、铋掺杂二氧化锡、氧化石墨烯、大肠杆菌

DOI号：

分类号： TQ028.8

出版年,卷(期):页码： 2020,40(2):53-59

摘要：

采用电化学—水热法，以聚四氟乙烯（PTFE）微孔膜为支撑，制备Bi掺杂SnO2修饰氧化石墨烯（GO）的电催化膜（Bi-SnO2/GO），通过SEM、TEM、EDS、XRD、LSV、EIS、CV等手段对其结构及性能进行表征，并评价其对水中大肠杆菌去除效果。结果表明，当铋锡摩尔比为1:15、电沉积电压为2.0V时，制备的Bi-SnO2/GO电催化膜的析氧电势为1.75V，Bi-SnO2/GO膜表面均匀分布着纳米Bi-SnO2粒子，粒子尺寸约为10.4 nm，Sn 和 Bi元素含量分别为 11.28 wt% 和 3.59 wt%；当外加直流电压为2.5V且连续运行5h时，Bi-SnO2/GO电催化膜对水中大肠杆菌的去除率达到96.82%。表明Bi掺杂SnO2显著提高了GO基电催化膜的电性能及大肠杆菌去除性能。

Bi-SnO2/GO electrocatalytic membrane based on polytetrafluoroethylene (PTFE) microporous membrane was prepared by electrochemical-hydrothermal method. The composition structure and electrochemical performance were characterized by a series of characterization methods such as SEM, TEM, EDS, XRD, LSV, EIS, CV and so on. The removal efficiency of Bi-SnO2/GO membrane was also evaluated by treating E. coli. The results show that when the molar ratio of Bi to Sn is 1:15 and the electrodeposition voltage is 2V, the oxygen evolution potential of the electrocatalytic membrane is 1.75V. Bi-SnO2 nanoparticles were uniformly distributed on the surface of Bi-SnO2/GO electrocatalytic membrane. The particle size is about 10.4 nm, and the contents of Sn and Bi elements are 11.28 wt% and 3.59 wt%, respectively. Under the DC voltage of 2.5 V and the continuous operation time of 5 h, the removal rate of E. coli by Bi-SnO2/GO membrane is 96.82%. This indicates that the Bi-SnO2/GO electrocatalytic membrane has a good application prospect in the removal of microorganisms from water.

基金项目：

国家自然科学基金（51878659），军队后勤科研重大项目（AWS18J004）

作者简介：

第一作者简介：李雪燕（1993－），女，河南驻马店人，硕士生，研究方向为膜分离水处理技术，E-mail：2965783374@qq.com； *通讯作者：E-mail: zmf323@163.com，E-mail: dcnudt@163.com

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