TiO_2薄膜光催化效果的强化(1)  

Promotion of Photocatalytic Efficiency for TiO_2 Thin Film(1)

作　　者：吴光辉[1] 杨莉[1] 万诗贵[1] 

机构地区：[1]南昌航空工业学院环境与化学工程系,江西南昌330034

出　　处：《江西化工》2004年第4期125-128,136,共5页Jiangxi Chemical Industry

摘　　要：采用溶胶 -凝胶法制备Ti0 2 溶胶 ,将其涂覆在普通钠钙玻璃上 ,以Ti0 2 对甲基橙的光分解率探讨Ti0 2 薄膜的最佳焙烧时间、焙烧温度、光催化性能。结果表明 ,当焙烧温度为 45 0℃、焙烧时间为 1h时 ,Ti0 2 的晶型为锐钛矿型 ,对甲基橙的光分解率最高 :水加入量为 0 .2 5g时 ,镀膜效果较为理想 :未修饰的Ti0 2 薄膜在pH =2时 ,光催化活性最高 ;Ti0 2 与H2 S0 4的摩尔比为 1 :1 .5时 ,超强酸化薄膜的光催化活性最高 :La3 + 掺杂量为 5 %、Fe3 + 掺杂量为 0 .0 3 %时 。Ti0 2 sol wasprepared using sol-gelmethod,and coated on the surface of common glass, the best calcinated time and temperature and photocatalytic ability was investigated in terms of the degradation of Ti0 2 thin film on methyl orange.The results demonstrated that the Ti0 2 crystalline phase was anatase and the degradation on methyl orange was highest when calcinated time=1h, calcinated temperature was 450℃.The coated film was perfect when the addition quantity of water was 0.25g.The photocatalytic activity of Ti0 2 thin film without modifying was highest when pH=2.The photocatalytic activity Of aciditied thin fihn was best when n(“Ti0 2):n (H 2S0 4)=1:1.5,m(La 3+ ):m(Ti0 2)=5%,m(TiO 2):m(Ti0 2)=0.03%.

关 键 词：超强酸 加入量 摩尔比 TIO2薄膜 光催化活性 涂覆 H2SO4 甲基橙 焙烧温度 焙烧时间 

分 类 号：O643.3[理学—物理化学]