采用溶胶-凝胶法制备N掺杂TiO2溶胶，用浸渍-提拉方法将溶胶涂敷在陶瓷膜表面，制备具有抗污染性能的光催化陶瓷膜。光催化与膜分离技术相结合，处理含盐直接耐酸大红4BS染料废水，考察了料液pH值、初始浓度、跨膜压差、膜面流速等因素对含盐染料废水处理效果的影响。结果表明，该复合陶瓷膜对4BS染料的截留率在99％以上，对无机盐的截留率低于1％，光催化膜分离耦合的膜通量较单-膜分离的通量提高90％。
N-doped TiO2 sol was synthesized by sol-gel method. The sol was coated on an inorganic ceramic membrane by dipping-raise method to make a photocatalytic ceramic membrane with antifouling characteristics. Dye wastewater containing salt (direct fast scarlet dye 4BS) was treated by the combination of photocatalytic technique and membrane separation. Initial concentration, pH, trans-membrane pressure and cross-flow veloci- ty on treatment effect of the dye wastewater was investigated. The results showed that the rate of rejection was 99% for the dye and less than 1% for inorganic salt in composite ceramic membrane. The permeate flux of the composite membrane was increased by 90 % in irradiation, without irradiation. compared with the processes of membrane separation
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