Cu^(2+)掺杂TiO_2的制备及光催化性能  

Preparation and photocatalytic performance of Cu^(2+)-doped TiO_2

作　　者：武小满[1] 郭丽丽[1] 候东霞 

机构地区：[1]许昌学院化学化工学院,许昌461000

出　　处：《化工新型材料》2017年第5期155-157,共3页New Chemical Materials

基　　金：河南省高等学校重点科研项目(16A150063)

摘　　要：以钛酸丁酯为原料,以硝酸铜为铜源,利用溶胶-凝胶法原位制备铜离子掺杂TiO_2。考察催化剂降解亚甲基蓝的光催化性能,利用X射线衍射、紫外-可见漫反射吸收光谱对其晶相结构与光响应性能进行表征。结果表明:焙烧温度为450℃,铜掺杂量为0.6%(摩尔分数)时,Cu^(2+)/TiO_2催化性能最佳。紫外光照射80min后,亚甲基蓝的降解率达到96.4%,为纯TiO_2的1.41倍。TiO_2的活性相为锐钛矿,金红石相出现时光催化活性降低。少量Cu^(2+)的修饰降低了TiO_2的平均晶粒半径,显著增强了TiO_2的光响应性能。Using tetrabutyl titanate as raw material,and copper nitrate as doping source,TiO2 with different copper contents were prepared in situ by sol-gel method. The photocatalytic performance test showed that there were best catalytic performance when the calcination temperature was 450℃, the doping amount of copper was 0.6mol%. When irradiating under UV light for 80min, the degradation rate of methylene blue could reach 96.4%, which had a 141% increase over the pure TiO2. XRD and UV-Vis absorption spectroscopy results showed that the activity phase of TiO2 were anatase phase and rutile phase reduced catalytic activity. The modification of small amount Cu^2＋ reduced the average grain radius and enhanced significantly the light response performance of TiO2.

关 键 词：Cu^2+/TiO2 溶胶-凝胶法 亚甲基蓝 光催化 

分 类 号：O643.36[理学—物理化学]