| 纳米TiO2介孔薄膜的模板组装制备研究 | |
| Preparation of Nanocrystalline Titania Mesoporous Films by Template Assembled Method | |
| 摘要: 以TiCl4为无机前驱体、三嵌段高分子共聚物EO20PO70EO20为模板剂，在非水条件下制备了有序的锐钛矿TiO2纳米晶介孔薄膜。通过热重-差热（TG-DTA）分析、X射线衍射（XRD）分析、原子力显微观察（AFM）及N2吸附-脱附等测试对样品进行了表征。结果表明，薄膜具有均一的大介孔孔径（～10 nm），其BET比表面积为150 m2·g-1，薄膜较宽的无机壁厚显著提高了介孔结构的热稳定性。通过红外（IR）光谱分析考察了溶胶-凝胶过程中发生的物理化学变化。在对薄膜表面形貌进行AFM观察的基础上初步探讨了嵌段共聚物EO20PO70EO20对薄膜孔结构形成的导向机理。 | |
| 关键词: 纳米TiO2 介孔薄膜 模板组装 | |
| 基金项目: | |
| Abstract: Organized mesoporous thin films of nanotextured anatase were prepared by hydrolysis of TiCl4 in the presence of poly(alkylene oxide) block copolymer EO20PO70EO20, acting as templates under non-aqueous conditions. The samples were characterized by thermogravimetry-differential thermal analysis(TG-DTA), X-ray diffraction(XRD), atomic force microscopy(AFM) and N2 adsorption-desorption isotherm. The results show that the pores are uniform with large mesoporous diameter about 10 nm and BET specific surface area of the film is 150 m2·g-1. The thick inorganic wall significantly enhances the stability of the porous structure. The physical and chemical changes in sol-gel have been analyzed through IR spectrometry. Structure directing mechanism of EO20PO70EO20 has also been discussed elementarily. | |
| Keywords: nanocrystalline titania thin films template assembled | |
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| 步绍静,靳正国,刘晓新,杨立荣,程志捷.纳米TiO2介孔薄膜的模板组装制备研究[J].无机化学学报,2004,20(2):169-174. | |
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