Au-TiO_2纳米复合膜电极的光电化学性能及其表面形貌  

Photoelectrochemical Properties and Morphology of the Nanopartical Au-TiO_ 2 Composite Porous Films

作　　者：崔晓莉[1] 赵崇军[2] 严曼明[2] 庄继华[2] 江志裕[2] 

机构地区：[1]复旦大学材料科学系,上海200433 [2]复旦大学化学系,上海200433

出　　处：《半导体光电》2002年第6期415-417,420,共4页Semiconductor Optoelectronics

基　　金：国家自然科学基金资助项目 (2 0 0 730 11) ;中国博士后科学基金项目

摘　　要：应用绿色激光研究了Au TiO2 纳米复合膜电极的光电化学行为 ,发现Au TiO2 复合膜电极在Na2 SO4 溶液中对 5 32nm的可见光表现出良好的阳极光电流响应 ,光电流随电极电位的增加而增大。可见光激发下产生光电流的主要原因在于金粒子的表面等离子体共振吸收。SEM的观测实验表明电极表面存在纳米孔洞 ,这些纳米孔洞是金基底在煅烧过程中产生的。Photoelectrochemical behavior of the nanopartical Au TiO 2 composite porous film electrode is analyzed by using a green laser (532 nm) in the solution of Na 2 SO 4 . An anodic photocurrent can be observed because of the surface plasma resonance of gold. The photocurrent increased with the increase of the electrode potential. The result of measurement of scanning electron microscope (SEM) shows that there exist many nano pores on the electrode surface. This porous film with the pore size of a few hundred nanometers resulted from the calcination of gold film.

关 键 词：Au/TiO2纳米复合膜电极 光电化学 表面形貌 

分 类 号：O647[理学—物理化学]