摘要
以Ti(n-OC_4H_9)_4和CH_3COOK为前驱体,采用溶胶-凝胶法在载玻片上制得纳米平整度的四钛酸钾致密薄膜,并用原子力显微镜(AFM)分析了薄膜的表面结构.运用TG和XRD研究了四钛酸钾的生成过程.在四钛酸钾薄膜上进行十八烷基三氯硅烷(OTS)的自组装,通过测量自组装单分子膜(SAMs)因光催化分解而导致接触角变化研究薄膜的光催化性能.结果表明:薄膜由纳米颗粒组成,扫描范围为2μm×2μm的AFM图的均方根粗糙度(RMS)仅为4.1nm;四钛酸钾薄膜上形成的致密OTS单层膜的质量与在TiO_2薄膜上相似,该薄膜具有较强的光催化能力.
A new nanosmooth potassium tetratitanate film was prepared on glass substrates by a sol-gel method using Ti（n-OC4Hg）4 and CH3COOK as precursors. The surface structure of the film was analyzed by atomic force microscope （AFM）. The crystal growth of potassium tetratitanate was characterized by TG and XRD. The photocatalytic decomposition of octadecyltrichlorosilane （OTS） based self- assembled monolayers（SAMs） formed on K2Ti4O9 films was studied by using contact angle analysis. The results show that the films consist of flat particles with the ratio of diameter to height about 11. The root mean square roughness （RMS） of the films measured on an area of 2μm×2μm in AFM images is 4.1nm. Densely packed OTS-SAMs similar in quality to those on TiO2 are formed on K2Ti4Og. K2Ti4O9 efficiently decomposes OTS-SAMs under UV irradiation in air.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第4期749-753,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(20246002)
国家杰出青年基金(20428606)
973项目(2003CB615700)
关键词
溶胶-凝胶
四钛酸钾薄膜
原子力显微镜
光催化
sol-gel process
potassium tetratitanate film
atomic force microscope
photocatalysis
