热氧化制备TiO_2纳米薄膜电极及其光电化学性质研究  

Photoelectrochemical Properties of Nano-TiO_2 Film Electrodes Prepared by Thermal Oxidation

作　　者：杨洁[1] 徐红[1] 赵尧敏[1] 刘玲[1] 江志裕[1] 

机构地区：[1]复旦大学,上海200433

出　　处：《稀有金属材料与工程》2007年第7期1283-1286,共4页Rare Metal Materials and Engineering

摘　　要：利用管式炉热氧化金属钛片法方便的制备了金红石型TiO2纳米薄膜，并用纳米Au粒子对薄膜电极进行修饰。结果表明，在650℃热氧化30min形成的TiO2薄膜具有最好的光电化学性质，在此条件下形成的薄膜厚度约为2μm，薄膜表面被尺寸大小不等的纳米TiO2棒所覆盖，长为100～600nm，直径为90～100nm。TEM观测结果表明，纳米Au粒子的尺寸为30～50nm，当薄膜电极表面吸附0．37μg/cm^2的纳米Au粒子时光电流可提高约1．4倍。TiO2 nano-film electrodes were prepared by thermal oxidation of Ti metal sheets in tube furnace. The results showed that the film electrodes oxidized at 650 ℃ for 30 min performed the best photoelectrochemical behavior with thickness of about 2 μm. Many nano-TiO2 stick with the length of 100 nm - 600 nm and the width of 90 nm-100 nm appeared on the surface. The size of Au nanoparticles is 30 nm-50 nm, and the photocurrent of nano-Au/TiO2 electrode had a nearly 1.4-fold enhancement after the modification with Au nanoparticles.

关 键 词：热氧化 TIO2 纳米薄膜电极 光电化学 

分 类 号：O614.411[理学—无机化学]