负载型掺杂TiO-2光催化剂降解城市有机废水的研究

Research of doped Supported TiO_2 Photocatalyst degradation of municipal sewage

采用微乳液法制备负载型纳米TiO2光催化剂,用Fe,La等元素进行掺杂。对淮南城市污水进行光催化降解,通过测定有机废水中化学需氧量(COD)去除率,对不同元素掺杂的TiO2的光催化效果进行分析。结果表明:掺杂Fe和La元素的催化剂的光催化效果最好,最佳掺杂量分别为0.2%和0.4%;催化剂投入量为3g/L,pH=4,紫外照射3h,降解率可达70%以上;催化剂可再生4次以上。

Supported nanometer TiO2 photocatalysts doped by Fe,La and other ions were prepared through microemulsion.The effect of the photocatalysts based on Huainan municipal sewage was determined through COD elimination.The results showed that the optimum effect was the photocatalyst doped by Fe（Wt=0.2%）,La（Wt=0.4%）.The COD elimination was more than 70% when the solution pH=4,the photocatalyst proportion was 3g/L and degradation for 3h.That photocatalyst can regenerate more than 4 times.