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Electronic State Characterization of TiO2Ultrafine Particles by Luminescence Spectroscopy

✍ Scribed by Yingchun Zhu; Chuanxian Ding; Guohong Ma; Zuliang Du

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
204 KB
Volume
139
Category
Article
ISSN
0022-4596

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✦ Synopsis

The electronic states of TiO 2 ultrafine particles (UFP) are characterized by photoluminescence spectra and diffuse reflection spectra. The results obtained indicate that the surface structure, i.e., TiOH groups, TiOC 2 H 5 groups, and the defect state, plays an important role in the electronic states of the TiO 2 UFP. Moreover, free exciton emission is observed at room temperature. This emission is attributed to the quantum confinement and the dielectric confinement effects on the TiO 2 UFP.

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