| 针状TiO2锐钛矿晶粒溶胶的制备、结构及形成机理研究 |
| Study on Preparation, Structure and Forming Mechanism of the Needle-like TiO2 Anatase Crystals Sol |
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| 摘要: |
| 关键词: 过氧钛酸溶胶 锐钛矿晶粒溶胶 水热反应 反应机理 |
| 基金项目: |
| Abstract: The PTA sol was prepared using titanyl sulfate(TiOSO4), peroxide (H2O2) and ammonia (NH3·H2O) as raw materials. The semitransparent, light yellow AS(autoclaved sol) with ultra-fine needle-like anatase crystals was synthesized by autoclaving the PTA sol at 80～100 ℃ for different times. The anatase crystals were needle-like and 80 nm in length, 20～30 nm in diameter. The FTIR, XRD, SEM were used to analyse the chemical structure, properties of the AS and influencing factors during the sol preparation. The mechanism model of the AS formation was established based on the inorganic and crystal structural chemistry. The PTA molecules were decomposed to form Ti4+ under hydrothermal conditions and the Ti4+ were hydrated with water to get [Ti(OH)4(OH2)2]0, a growing units of the anatase crystals. The appearance of the needle-like anatase crystals and the anatase precipitate are also explained in this paper. |
| Keywords: peroxo titanic acid sol anatase crystals sol hydrothermal reaction reactive mechanism |
| 投稿时间：2004-07-26 修订日期：2004-11-19 |
| 摘要点击次数: 1269 |
| 全文下载次数: 1880 |
| 戈磊,徐明霞,方海波.针状TiO2锐钛矿晶粒溶胶的制备、结构及形成机理研究[J].无机化学学报,2005,21(3):394-398. |
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