无机材料学报

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量子尺寸氧化钛纳米晶的制备及其光谱研究

张青红; 高濂; 郭景坤   

  1. 中国科学院上海硅酸盐研究所高性能陶瓷和超微结构国家重点实验室, 上海 200050
  • 收稿日期:1999-10-06 修回日期:1999-11-01 出版日期:2000-10-20 网络出版日期:2000-10-20

Preparation and Spectral Characterization of Quantum-Size Titanium Dioxide in the Rutile Phase

ZHANG Qing-Hong; GAO Lian; GUO Jing-Kun   

  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure; Shanghai institute of Ceramics; Chinese Academy of Sciences; Shanghai; 200050 China
  • Received:1999-10-06 Revised:1999-11-01 Published:2000-10-20 Online:2000-10-20

摘要: 以TiCl为原料,制备了金红石相透明的氧化钛胶体(=3nm)和粉体(=6.8nm).用紫外-可见光谱、反射光谱和导数吸收谱研究了金红石相氧化钛纳米晶的量子尺寸效应.实验观测到的量子尺寸效应比锐钛矿相氧化钛显著;也大于有效质量近似和紧束缚近似的预测值.

关键词: 金红石, 胶体, 量子尺寸效应

Abstract: The syntheses of transparent colloidal solutions of extremely small titanium dioxide particles (d=3nm) and powders (d=6.8nm) in the rutile phase were
presented. Quantum-sized effects were observed by using UV-Vis absorption spectra,reflectance spectra and differentiate absorption spectra. The amount of blue-shift
of λonset is greater than that of colloid titania in the anatase phase and also greater than that of theoretical prediction developed by Brus
based on effective mass approximation and tight binding approximation.

Key words: rutile, colloid, quantum-size effect

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