纳米掺铁二氧化钛的sol-gel法制备与表征(Ⅰ)热重红外联用分析掺铁二氧化钛凝胶的热分解和晶化特性

The Characterization and Preparation of Nano scale Fe Doping TiO2 by Sol gel Method? The Crystallization and Thermal Decomposition Process of Fe Doping TiO2 Xerogel Powders using Thermal TG IR Spectrometry

本文通过热分析、红外联用和 X射线衍射分析了不同煅烧温度下的纳米掺铁二氧化钛样品，研究了 sol-gel方法制备的纯二氧化钛和掺铁二氧化钛干凝胶的热分解和晶化过程。结果表明，干凝胶有较为明显的两个阶段的热分解。在实验条件下得到的二氧化钛干凝胶粉为无定形，无定形二氧化钛加热晶化过程是一个持续的过程，没有明显的晶化温度。

The pure and Fe doping TiO2 xerogel powders were prepared by sol gel method. Thermal stability of the TiO2 xerogel powders were investigated in air by TG DTA. At the several temperature elevating stages, the samples were submitted to IR analyzing for the elucidation of decomposition process. The crystallization and phase transformation of the TiO2 xerogel powders, from amorphous to anatase and from anatase to rutile, were studied by X ray diffraction. It was shown that the xerogel powders obtained were amorphous. Upon heating, the amorphous powders crystallized continuously. No crystallization temperature previously reported in the literature was observed.