碳纳米管改性TiO_2光催化剂的制备及性能  

Preparation and Characterization of Carbon Nanotube Modified TiO_2 Photocatalyst

作　　者：李景印[1] 韩忠宵[2] 李朝阳[1] 王辉[1] 李子成[1] 

机构地区：[1]河北科技大学理学院化学系,河北石家庄050018 [2]河北工业职业技术学院,河北石家庄050091

出　　处：《化学研究》2008年第1期11-14,共4页Chemical Research

基　　金：河北省教育厅科学技术研究计划资助项目(2004201);河北省科技厅研究计划资助项目(05215101)

摘　　要：以钛酸四丁酯为前驱体,通过溶胶-凝胶法制备了碳纳米管(CNT)改性的TiO2光催化剂.考查了不同CNT含量的光催化剂的催化活性,结果表明CNT的质量分数为0.3%时对甲基橙具有最佳的降解效果,100min的降解率接近90%,明显高于纯TiO2.采用XRD、IR和UV-vis对光催化剂进行了表征,光催化剂的粒径经计算为20 nm^30 nm,红外光谱中改性TiO2有羰基吸收峰,紫外光谱中改性TiO2的吸收出现明显红移.The photocatalyst of carbon nanotube （CNT） modified nano-TiO2 was prepared by the sol-gel method. The photocatalytic degradation of methyl orange was investigated with the CNT modified TiO2 and pure TiO2 composites. The results showed that the CNT modified TiO2 possessed higher photocatalytie activity and the optimum content of CNT was 0.3%. The photocatalyst was further characterized by XRD, UV-vis and IR techniques. The average diameter of the composite particles was 20 - 30 nm and IR analysis of modified TiO2 showed the absorption peak of carbonyl group. Also, UV-vis peak from modified TiO2 shifted obviously to long-wavelength.

关 键 词：纳米TIO2 碳纳米管 光催化降解 甲基橙 

分 类 号：O613.71[理学—无机化学]