Preparation and EPR Spectra of Titanium Dioxide and Fe-Doped Titanium Dioxide Materilals

Abstract

Abstract:

TiO₂ and TiO₂ doped with Fe were synthetized by the sol-gel method with tetrabutyl titanate, absolute ethyl and alcoholglacial acetic acid as the raw materials at room temperature. Xerogel was collected after reaction for two days under room temperature and dried at 100 ℃. TiO₂ and Fe-doper powder samples were prepared by heating the xerogel at 500 ℃. The sampels were analyzed by X-ray diffraction and EPR techniques. The results showed that all samples made in this way were anatase, and Fe had been doped into the crystal lattice of TiO₂. With the increase of the dose of Fe doping, the signal intensity of Ti³⁺ oxidation center increased, and its peak moved towards the magnetic reducing direction.The signal intensity of Ti³⁺ oxidation center in Fe-doped 0.1% of Fe-TiO₂ samples also increased with temperatures, and its peak also moved towards the magnetic reducing direction. The results were explaned according to the theory of EPR and the reaction of TiO₂and O₂.

Key words: EPR, titanium dioxide, sol-gel method

CLC Number:

O482.53

SHEN Gan, YAN Chun-Hao, ZHU Shan-Shan, LI Fu-Qiang, HOU Lei-Tian. Preparation and EPR Spectra of Titanium Dioxide and Fe-Doped Titanium Dioxide Materilals[J]. Chinese Journal of Magnetic Resonance, 2011, 28(4): 454-463.

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