利用传质作用提高污染物HCHO的光催化反应速率

Enhancement of Photocatalytic Reaction Rate of HCHO Under the Action of Mass Transfer

摘要: 为了提高室内污染物在低浓度条件下的光催化反应速率,采用将光催化技术与活性炭吸附技术相结合的方法,在解决催化剂TiO₂膜牢固性和活性的基础上,利用活性炭吸附功能,强化污染物HCHO在低浓度条件下向催化剂表面的传质,提高其在催化剂TiO₂表面的局部浓度.实验结果表明,该方法一方面提高了室内污染物HCHO的光催化反应速率,另一方面催化剂TiO₂表面HCHO去除延缓了活性碳的吸附饱和,提高了催化剂TiO₂膜的使用寿命.

Abstract: In order to enhance the photocatalytic reaction rate of formaldehyde,the photocatalytic technology was combined with active carbon adsorption technology.Based on the fastness and the higher activity of TiO₂ film,the transfer of HCHO to the surface TiO₂ film was enhanced for the adsorption of active carbon and the local HCHO concentration on the surface of TiO₂ film was increased.The experimental results shown that the photocatalytic reaction rate of HCHO was improved and the adsorption saturation of active carbon was delayed, so the life of TiO₂ film was prolonged.From above results it can conclude that the combination of activated carbon and photocatalytic technology is an application future of photocatalytic technology.