La、Fe共掺杂TiO_2/活性炭纤维的制备及其光催化性能

Preparation and properties of La and Fe co-doping TiO_2/ACF composite photocatalyst

采用溶胶-凝胶法,以硝酸镧和钛酸丁酯为原料,选取活性炭纤维作为载体,制备了La、Fe共掺杂TiO2/ACF复合材料,通过紫外灯照射,对甲醛气体进行光催化降解,考察材料的光催化活性。结果表明,适宜的La、Fe掺杂量能够提高TiO2/活性炭纤维的光催化活性。当La的掺杂量为0.5%(摩尔分数),Fe的掺杂量为0.5%(摩尔分数),焙烧温度为350℃时,La、Fe共掺杂TiO2/ACF光催化性能最佳,反应2h甲醛降解率达到98.9%。

La and Fe co-doping TiO 2/ACF composite photocatalyst was prepared by sol-gel method with ACF. The photocatalytic activity of the composite photocatalyst under ultraviolet light was evaluated by degradation of formaldehyde.The results showed that the photocatalytic activities of La and Fe co-doping TiO 2/ACF com-posite photocatalysts can be improved in appropriate amount.The photocatalystic activity of the La,Fe-TiO 2/ACF composite photocatalyst co-doped with 0.5mol% of La,0.5mol% of Fe and calcined under 350 ℃ was the best,the degradation rate of formaldehyde examined at two hours of the reaction was 98.9%.