中文摘要：

纳米TiO2上负载纳米Pt以制备纳米Pt／TiO2。半导体光催化剂，壳聚糖（CS）经纳米Pt／TiO2改性后作为阴膜层材料，以羧甲基纤维素（CMC）作为阳膜层材料，分别用戊二醛与FeCl。对阴、阳膜层进行交联改性，制备了CMC-Pt／TiO2-CS双极膜，并将该复合膜作为降解高浓度含酚废水电解槽的隔膜。结果表明：Pt／TiO2光催化剂可促进双极膜中间层水的解离，大大降低双极膜的膜阻抗和电阻电压降（IR降）；同时，Pt／TiO2光催化剂表面生成的羟基自由基（·OH）可直接作用于苯酚，使其彻底降解成无机小分子；紫外光照下在16．7mA·cm^-2的电流密度下电解高浓度含酚废水80min后，cMc-Pt／TiO2-CS双极膜的苯酚降解率比CMC-TiO2-CS双极膜的苯酚降解率高12．7％；整个电解过程CMC-Pt／TiO2-CS双极膜的膜电阻电压降保持在0．9V。

英文摘要：

Chitosan： （CS） was modified with nano-Pt/TiO2 semiconductor photocatalyst （CS - Pt/TiO2 ） which was prepared by doping Pt on TiO2 in advance. CMC - Pt/TiO2 - CS bipolar membrane was then prepared using carboxymethyl cellulose （CMC） and CS - Pt/TiO2 which were cross - linked by FeC13 and glutaraldehyde, respectively. Sandwich-typed CMC- Pt/TiO2 -CS bipolar membrane, the composite membrane with fine protons and hydroxyl ion-permeability, was then applied as the septum of the electrolytic cell in the degradation of phenol. Nano-Pt/TiO2 semiconductor photocatalyst can not only generate hydroxyl radicals （ · OH） which can directly degrade phenol into the small inorganic molecules, but also promote water splitting at the intermediate layer of CMC-Pt/TiO2 -CS bipolar membrane and greatly reduce the impedance and resistance（IR） of bipolar membrane. Compared CMC - Pt/TiO2 - CS bipolar membrane with CMC - TiO2 - CS bipolar membrane under UV irradiation, the degradation rate of the former is 12.7%higher than that of the latter after 80 min electrolysis at the current density of 16.7 mA · cm^- 2, while IR drop of CMC- Pt/TiO2 - CS is as low as 0.9 V.