纳米TiO_2的合成及纳米TiO_2/Pt修饰电极的电化学催化性能

采用溶胶-凝胶法合成纳米TiO2粉体,通过正交实验优化了纳米TiO2的合成工艺条件,用透射电镜及X-射线衍射技术对纳米TiO2样品进行表征;进而采用涂膜法制备纳米TiO2/Pt修饰电极,通过循环伏安法研究其在葡萄糖体系中的电化学催化性能。结果表明:在钛酸丁酯与乙醇体积比为2∶3、烘干温度为80℃、焙烧温度为500℃时,合成的纳米TiO2具有最佳电化学催化性能;合成的纳米TiO2为锐钛矿型,颗粒粒径分布在5~20nm之间;纳米TiO2/Pt修饰电极对葡萄糖具有显著的电化学催化活性。

Preparation of Nano-TiO2 and Electrochemical Catalytic Performance of Nano-TiO2-Modified Pt Electrodes

Nano-TiO2 samples were synthesized by the sol-gel method,characterized by TEM and XRD. The synthetic technique of nano-TiOz was studied by orthogonal experiment. The electrochemical catalytic perform- ance of nano-TiO2-modified Pt electrode in glucose solution was investigated by cyclic voltammetry（CV）. The optimal synthetic conditions were obtained as follows：the volume ratio of TBOT and EtOH was 2：3, the drying temperature was 80℃ ,the calcination temperature was 500 ℃. The nano-TiO2 samples prepared were ana- tase-type crystals with the size of 5 ~ 20 nm. The nano-TiO2-modified Pt electrode possessed higher electrochemical catalytic activity.