TiO_2/5A光催化降解水中CN^-的催化活性

Photocatalytic Degradation of Catalytic Activities of CN^- in Water by TiO_2/5A

采用溶胶-凝胶-浸渍法制备TiO2/5A型催化剂,以其对水样中CN-降解率的大小来评价催化剂的光催化活性,并与P25型纳米TiO2催化效果作比较,从而探讨5A型分子筛负载纳米TiO2的百分含量、催化剂加入量、水样的pH值及CN-初始浓度对TiO2/5A光催化降解水中CN-催化活性的影响。结果表明:5A型分子筛负载纳米TiO2的量为20%、加入量为1.5g/L、pH=10、CN-初始浓度为50mg/L,反应时间为3h时,降解率达88.64%,且优于P25型纳米TiO2的降解效果。

The TiO2/5A catalysts were prepared by sol-gel-dipping method.The photocatalytic activities were evaluated by catalytic degradation rate of CN^-in water samples,and compared with the catalytic activity of the P25 style nano-TiO2 for degrading CN^-,then the effects of the percentage composition of 5A molecular sieve loaded nano-TiO2,addition of catalyst,pH value of water sample and the initial concentration of CN^-on photocatalytic degradation of catalytic activities of CN^-in water by TiO2/5A were investigated.The results showed that when the amount of 5A molecular sieve loaded nano-TiO2 was 20%,the addition of which was 1.5g/L,the pH was 10 and the initial concentration of CN^-was 50 mg/L,and the reaction time was 3h,the degradation rate was 88.64% and it was better than that of the P25 style nano-TiO2.