摘要
用浸渍-提拉法将TiO2负载到活性炭纤维(ACF)上,在254 nm的紫外光源下,利用复合材料进行吸附光催化氧化甲醛气体动态实验研究。结果表明,甲醛的降解率随进口气量的增加有所下降;随TiO2负载质量分数的增加,复合材料的比表面积由830 m2.g-1降低到128.31 m2.g-1;反应温度升高,去除率下降;当湿度小于40%时,随着湿度的增加,甲醛去除率增大;湿度继续增加时,光催化反应速率反而降低;活性炭负载TiO2光催化降解甲醛过程长时间使用会产生催化剂失活。
Titania was loaded on activated carbon fiber （ ACF ） by impregnation. Photocatalytic oxidation of formaldehyde-containing gas was studied over ACF loaded with TiO2 under ultraviolet irradiation （254 nm）. The degradation rate for formaldehyde declined with the increase of flow rate of the inlet gas and reaction temperature. Surface area of the catalyst dropped from 830 m^2·g^-1 to 128.31 m^2·g^-1 with increasing loadings of TiO2. The formaldehyde degradation rate increased with humidity when the latter was lower than 40%, and then declined with humidity. Deterioration of the activity occurred with the TiO2/ACF catalyst after long term of use.
出处
《工业催化》
CAS
2008年第7期71-74,共4页
Industrial Catalysis
基金
人才强校一中青年骨干教师资助项目
关键词
催化化学
活性炭纤维(ACF)
二氧化钛
光催化剂
甲醛降解
catalytic chemistry
activated carbon fiber （ACF）
titania
photocatalyst
formaldehyde degradation
