连续片状纳米TiO2薄膜的制备和表征

采用溶胶-凝胶法，通过在制备过程中加入丙烯酸对纳米TiO2胶体颗粒进行表面修饰以及加入引发剂偶氮双异丁腈(AIBN)引发丙烯酸聚合，利用提拉法在载玻片表面制备了纳米TiO2薄膜；采用热分析仪考察了纳米TiO2胶体颗粒中有机物的热解行为，并用X射线衍射仪测定了经不同温度下焙烧后的纳米TiO2粉体的晶体结构；采用原子力显微镜和透射电子显微镜观察分析了薄膜的微观结构；在对不同制备条件下制备的纳米。TiO2干胶进行红外光谱分析的基础上，初步考察了薄膜成膜机理，结果表明，所制备的TiO2薄膜经400℃烧结处理后形成连续、片状、由粒径为6-8nm的纳米TiO2组成的薄膜材料。

Preparation and Characterization of Continuous Nano-TiO2 Film with Sheet Microstructure on a Glass Substrate

Nano-TiO2 film was prepared on a glass substrate by sol-gel method, using acrylic acid as a surface modifier.Azo-bis-isobutyronitrile (AIBN) was added in the reactants solution to evocate the polymerization of the acrylic acid and to allow the formation of an organic-inorganic compound. The resulting compound was coated onto the glass substrate and sintered at 400℃ for 1 h. The phase composition of nano-TiO2 gel calcinated at 300 ～ 500℃ was investigated using X-ray diffraction measurements, while thermogravimetric and differential thermogravimetric (TG-DTA) analysis was conducted to analyze the thermal decomposition behavior of the organic components in the film. The morphology and microstructure of the sintered film were observed by means of atomic force microscopy and transmittance electron microscopy, while the formation mechanism of the film was primarily discussed based on the analysis of the nanoparticles of TiO2 gel by means of Fourier transformation infrared spectroscopy. The results indicated that the nano-TiO2 film was continuous and had sheet microstructure, with the grain size of nano-TiO2 to be ca. 6 ～ 8nm.