【摘要】 最近在“氧化的”TiO2 (即表面无氧空位和Ti3+)上进行的CO光催化氧化研究发现 :室温下 ,以黑光灯 (峰值λ=365nm)光照时 ,“氧化的”TiO2 无CO催化氧化的活性 ,但以杀菌灯 (峰值λ =2 53.7nm)光照时 ,则对CO产生显著的催化活性 .参照CO在过渡金属表面的催化氧化机理 ,对本现象进行了解释 :黑光灯照时 ,O2 在TiO2 表面只生成O-2 (a) ,而O-2 (a) 不能使CO氧化 ,只有以杀菌灯照时 ,TiO2 表面产生O-(a) ,CO氧化反应才能发生 .更多还原

【Abstract】 The photocatalytic oxidation of CO on the “oxidized” TiO 2 was investigated. No CO photooxidation reaction was observed with UV( λ =365 nm) radiation, but CO photocatalytic oxidation could be carried out with UV( λ =253.7 nm) radiation at room temperature. Referring to the catalytic oxidation mechanism of CO on transition metals, it was explained by: O - 2(a) obtained by the ionsorption of O 2 on the “oxidized” TiO 2 could not oxidize CO, CO photooxidation reaction only occured when O - (a) was produced under UV( λ =253.7 nm) illumination.更多还原