【摘要】 采用电还原-水热法,以炭膜为基膜制备Bi掺杂的SnO₂（Bi-SnO₂/CM）电催化膜,并采用SEM、XRD、线性伏安法（LSV）、循环伏安法（CV）等表征手段对电催化膜的组成结构及性能进行分析。研究结果表明,Bi-SnO₂通过化学键与炭膜紧密结合,可以增加电催化膜的活性位点数量,使电催化膜对大肠杆菌表现出优异的去除性能。当Bi与Sn的物质的量比为0.15,电还原时间为60 min,电流为0.2 mA时,制得的电催化膜的析氧电势达到1.74 V,电化学腐蚀时间可以达到44.5 h,且连续运行5 h后对大肠杆菌的去除率仍高于96.1%。这表明Bi-SnO₂/CM电催化膜在水中污染去除方面具有很好的应用前景。更多还原

【Abstract】 The Bi-SnO₂/CM electrocatalytic membrane of Bi-doped SnO₂ was prepared by electrothermal reduction-hydrothermal oxidation method using carbon membrane as the substrate membrane. The structure and properties of the electrocatalytic membrane were characterized by XRS, LSV and CV. The removal performance of the electrocatalytic membrane was evaluated by the removal rate of E. coli. The results show that Bi-SnO₂ can increase the active site of the electrocatalytic membrane. When the molar ratio of Bi/Sn is 0.15, the redox time is 60 min, and the current is 0.2 mA, the performance of the prepared electrocatalytic membrane is the best, the oxygen evolution potential reaches 1.74 V, the electrochemical corrosion time can reach 44.5 h, and the continuous treatment is 5 h. The removal rate of E. coli is still more than 96.1%. The chemical bond with the carbon membrane is combined with the carbon membrane. In addition, the electrocatalytic membrane treatment of E. coli shows superior removal performance. It is indicated that Bi-SnO₂/CM electrocatalytic membrane has a good application prospect in wastewater treatment.更多还原