过渡金属离子及H_2O_2影响TiO_2光催化降解苯胺的动力学研究

The kinetics study on transition metal ions and H_2O_2 to influence TiO_2 photocatalytic degradation of aniline

采用溶液浸渍法制备TiO2并将其担载到瓷砖上,通过添加过渡金属离子和H2O2,来考察对TiO2光催化降解苯胺的影响,其动力学过程利用模型进行模拟。结果表明,添加Cu2+、Mn2+和Co2+均能提高TiO2催化活性,且提高程度为Cu2+>Mn2+>Co2+;掺杂Ni2+反而降低其活性。H2O2能提高瓷砖固载TiO2的催化活性,与Mn2+协同作用后效果更佳。反应时间为40 min时,Cu2+、Mn2+与H2O2的添加能提高TiO2光催化活性7%～35%。

A series of TiO2 catalysts supported on the tiles were prepared by a solution impregnation method.In order to improve the activity of catalyst,the dissolved transition metals or H2O2 were added in the aniline photodegradation reaction by TiO2.,whose Kinetics was simulated the model.The results indicated that the adding a little amount of Cu2＋,Mn2＋ or Co2＋ can raise the photodegradation efficiency,and Ni2＋ was just the opposite.Likewise,the adding of H2O2 can improve the activity of TiO2,and it had the more obvious effects after interaction with Mn2＋.When the reaction time was 40 min,the activity of TiO2 was improved by 7%～35% after the adding of Cu2＋,Mn2＋ or H2O2.