摘要
采用溶胶-凝胶浸渍提拉法在石英玻璃片上制备了Ag/TiO2薄膜。为研究不同热处理温度(500,600,700℃)对制备过程的影响,在薄膜的制备过程中其他的条件均不变(钛酸丁酯和硝酸银的摩尔比为1:0.18)。用透射电子显微镜(Transmission Electron Microscope,TEM)记录样品的透射显微镜图像和衍射花样以表征薄膜的结构,用背散射电子(Backscattered Electron,BSE)检测器观察样品表面的组分分布,用能谱EDAX(Energy Dispersive Analysis of X-rays)分析Ag/TiO2薄膜样品的元素成分组成。实验结果表明,500℃热处理时得到了含有尺寸均匀的纳米银粒子的Ag/TiO2膜,随着热处理温度的升高,Ag的颗粒逐渐长大,尺寸分布变得不均匀,同时,膜中的银逐渐向薄膜表面迁移并挥发。
In present work, Ag/TiO2 thin films with constant Ag content （Ti ： Ag = 1： 0.18） were prepared on quartz substrates by sol-gel d/p-coating method. The effects of different heat-treatment temperatures on the preparation of the sol-gel-derived Ag/TiO2 films were studied. Transmission electron microscope and Energy Dispersive Analysis of X-rays were employed to characterize surface microstructure and composition of the samples. Optical absorption spectra of Ag/TiO2 films were measured by spectrophotometer. The result shows that Ag nano-particle size was uniform when heat treatment temperature was 500 ℃. But Ag would diffuse and aggregate on film surface with increasing heat treatment temperature.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2008年第A02期181-184,共4页
Rare Metal Materials and Engineering
基金
国家自然科学基金资助项目(50372060和50672086)
