NO_2对光催化降解庚烯的作用  

The Effects of NO_2 for the Photocatalytic Degradation of Heptene

作　　者：颜为军[1] 徐自力[1] 谢超[1] 杨秋景[1] 李文艳[1] 黎娜[1] 刘星娟[1] 杜尧国[1] 

机构地区：[1]吉林大学环境与资源学院,长春130012

出　　处：《吉林大学学报（理学版）》2006年第2期303-307,共5页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:20277015)

摘　　要：以TiO2/SiO2为光催化剂,在紫外光作用下,讨论了NO2存在时,庚烯在TiO2/SiO2上的吸附和光催化降解作用.通过GC-MS和FT-IR,分别测定了3种不同体系的反应产物,从而推测出可能的反应机理.实验结果表明,TiO2/SiO2对庚烯的最大吸附量Mmax=3.10 mg,当存在NO2(44.64μmol/L)时Mmax=3.80 mg.在光催化降解庚烯的反应中,当NO2加入量较大(NO2≥89.28μmol/L)时,庚烯降解反应速率加快,但矿化度比无NO2时的小.The adsorption and photoeatalytie degradation of heptene on TiO2/SiO2 photoeatalyst under the irradiation of UV light were investigated carefully in the presence of NO2. By means of GC-MS and FT-IR, we respectively determined the intermediate products of the three different reaction systems, and accordingly deduced the possible reaction mechanisms. The experiment data indicate that Mmax= （the maximum adsorption amount of TiO2/SiO2 for heptene ） is 3. 10 mg, and is increased to 3.80 mg in the presence of NO2 （44. 64 μmol/L）. In the photocatalytic degradation of heptene, addition of a large amount of NO2 （NO2≥89. 28 μmol/L） can accelerate the photodegradation reaction rate of heptene, but its mineralization degree with the addition of NO2 is lower than that without the addition of NO2.

关 键 词：光催化 NO2 庚烯 吸附 降解 

分 类 号：X505[环境科学与工程—环境工程]