掺锌纳米TiO_2光催化性能研究  

Photocatalytic activity of Zn-doped TiO_2 nanoparticles

作　　者：喻红梅[1] 丁欣宇[1] 景晓辉[1] 

机构地区：[1]南通大学化学化工学院,江苏南通226007

出　　处：《印染助剂》2010年第3期35-38,共4页Textile Auxiliaries

基　　金：江苏省高校自然科学基金(08KJD540002);江苏省南通市应用研究计划项目(K2006017);南通大学自然科学研究项目(03040692)

摘　　要：以钛酸四丁酯、硝酸锌为主要原料,采用溶胶-凝胶法制备掺锌纳米TiO2微粒.以罗丹明B为目标降解物,考察了掺锌纳米TiO2粉体的光催化活性.结果表明:300℃焙烧4.5 h时,得到的催化剂活性最高.在紫外光照射下,催化效果明显优于太阳光照射(在紫外光下,pH值为2时,用1 g/L掺锌2.7%纳米TiO2光照70 min,罗丹明B的降解率接近100%;在太阳光下,pH值为10时,用4 g/L掺锌3.0%纳米TiO2光照120 min,罗丹明B的降解率达93%).Nano-sized photocatalyst of Zn-doped TiO2 was prepared using titanium N-butoxide and zinc nitrate as materials by sol-gel method.The photocatalytic activity of nano Zn-doped TiO2 was evaluated by the photocatalytic decomposition of Rhodamine B.The results showed that photocatalytic activity was the highest by the heat treatment at 300 ℃ for 4.5 h.The catalytic effect of UV light was superior to that of sunlight.Nearly 100% of Rhodamine B was degraded by 1 g/L 2.7% of Zn-doped TiO2 under 70 min of UV light radiation and pH 2.93% of Rhodamine B was degraded by 4 g/L 3.0% of Zn-doped TiO2 under 120 min of sunlight radiation and pH 10.

关 键 词：溶胶-凝胶 锌掺杂 纳米TIO2 光催化活性 

分 类 号：TQ314.242[化学工程—高聚物工业]