A STUDY OF TITANIA AND DOPED IRON TRIOXIDE ULTRAFINE POWDERS BY SURFACE PHOTOVOLTAGE SPECTROSCOPY

doi:10.7517/j.issn.1674-0475.1991.03.225

Abstract

Abstract: In this paper, the TiO₂ and Fe₂O₃:Mg:Si ultrafine powders were synthesized by the hydrolysis of metal alkoxides, and the depedence of their photocatalytic conversion efficiency to SO₃^2- aqueous solution on their surface photovoltaic responces was studied.It was found that, because the ultrafine particles are small in diameter, the light-induced electrons and holes are very easy to be trapped.Therefore, the results are different from usual powder photocatalysts.i.e., the weaker the surface photo-voltage signal, the higher the photocatalytic activity.

Key words: titania, iron trioxide, ultrafine powder, photocatalysis, surface photovoltage spectroscopy

ZHANG CHI-MING, LIU WANG, HAN MING-YONG, LI TIE-JIN, XIAO LIANG-ZHI. A STUDY OF TITANIA AND DOPED IRON TRIOXIDE ULTRAFINE POWDERS BY SURFACE PHOTOVOLTAGE SPECTROSCOPY[J]. Imaging Science and Photochemistry, 1991, 9(3): 225-228.

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A STUDY OF TITANIA AND DOPED IRON TRIOXIDE ULTRAFINE POWDERS BY SURFACE PHOTOVOLTAGE SPECTROSCOPY

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