纳米TiO2-AC负载膜光催化降解偶氮染料

以钛酸四丁酯和活性炭为主要原料，采用溶胶-凝胶-浸渍法制备纳米TiO2-AC负载膜催化剂，并借助流化床反应器分别对两种典型的偶氮类染料橙黄C、活性艳红X-3B模拟废水进行了UV光降解、暗态吸附及光催化降解研究，探讨了pH值、外加氧化剂对光催化去除率的影响，同时对催化剂进行回收再生利用试验。结果表明：纳米TiO2-AC负载膜具有很好的光催化活性、吸附特性及可再生性，两种染料1h的光催化降解率最高分别可达99．71％和97．12％。反应过程中固、液、气三相能够有效分离，实现了反应与分离的一体化。

Photocatalytic Degradation of Azo Dyes Using Nanometer-sized TiO2 -AC Immobilized Film

Using tetrabutyl titanate and activated carbon as the raw material,nanometer-sized TiO_2 film photocatalyst immobilized on activated carbon(TiO_2-AC)was prepared by sol-gel-dip method.The UV photo-degradation,absorption in dark,photocatalytic degradation of azo dyes orange G and reactive brilliant red X-3B were studied in a fluidized photocatalytic reactor.The influences of pH value,additive oxidants to the photocatalyic degradation rate were investigated.The regenerated efficiency of photocatalyst was also tested.The results indicate that TiO_2-AC poses high photocatalytic activity,absorbability and regeneration property.The highest photocatalytic degradation rates of two azo dyes are(99.71)% and 97.12% respectively in an hour.The TiO_2-AC,liquid and gas are separated effectively in the reaction process.The integrative process of reaction and separation is achieved.