氨及其氧化产物对TiO_2/ACF光催化降解甲苯的影响  

Influence of Ammonia and Oxidized Products of Ammonia on Photocatalytic Degradation of Toluene by TiO_2/ACF

作　　者：马翠梅[1] 白志鹏[1] 关泽[1] 郭婷[1] 

机构地区：[1]南开大学环境科学与工程学院国家环境保护城市空气颗粒物污染防治重点实验室,天津300071

出　　处：《城市环境与城市生态》2008年第5期29-31,36,共4页Urban Environment & Urban Ecology

基　　金：国家教育部"跨世纪优秀人才培养计划"基金(2002-48);2006年天津市科技发展计划攻关培育项目(2006-38)

摘　　要：利用自制的复合材料二氧化钛/活性炭纤维(TiO2/ACF)和自行设计的环境模拟舱,对吸附在TiO2/ACF上的甲苯和氨进行了光催化降解研究。重点考察了氨及其氧化产物对甲苯光催化降解的影响。结果表明,在254 nm紫外灯照射下,氨与甲苯产生竞争光催化降解效应,甲苯光催化降解效率降低;NO2-和NO3-是氨光催化氧化产物,NO2-进一步氧化抑制甲苯降解,而NO3-的存在对甲苯降解没有明显影响;氨及其氧化产物均未导致催化剂失活。Photocatalytic degradations of toluene and ammonia on TiO2/ACF were investigated in the self-designed environmental chamber.The influence of ammonia and oxidized products of ammonia on degradation of toluene were inspected carefully.Under the irradiation of UV light(λ=254nm),the competition effect between the photocatalytic oxidation of ammonia and toluene led to the decrease of photocatalytic efficiency of toluene.NO-2 and NO-3 were identified as oxidized products of ammonia.Photocatalytic oxidation of NO-2 restrained the degradation of toluene while NO-3 had little influence on it.Ammonia and oxidized products of ammonia did not lead to apparent catalyst deactivation.

关 键 词：光催化 TIO2/ACF 氨 中间产物 甲苯 

分 类 号：X51[环境科学与工程—环境工程]