Study on the Influence of Pt4+ Doping on the Photocatalytic Efficiency of TiO2 by Technique of Laser Flash Photolysis

doi:10.7517/j.issn.1674-0475.2007.03.191

Abstract

Abstract: By using nanosecond laser to excite colloidal particles of pure and Pt⁴⁺ doped TiO₂ in aqueous solution,we have monitored the absorption spectrum of O^- at about 440 nm which is the signal of trapped holes and an active species in the photocatalytic reaction.Results showed that the absorption spectrum decayed within microseconds,the concentration and the decay rate of O^- determined the photodegradation efficiency.Thus,nanosecond laser flash photolysis has been carried out to elucidate the drastic enhancement of Pt⁴⁺ doping on the photocatalytic efficiency of TiO₂.

Key words: laser flash photolysis method, Pt⁴⁺ doping, TiO₂, photocatalysis

CLC Number:

LI Guang-qin, LIU Chun-yan, LIU Yun. Study on the Influence of Pt⁴⁺ Doping on the Photocatalytic Efficiency of TiO₂ by Technique of Laser Flash Photolysis[J]. Imaging Science and Photochemistry, 2007, 25(3): 191-197.

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Study on the Influence of Pt⁴⁺ Doping on the Photocatalytic Efficiency of TiO₂ by Technique of Laser Flash Photolysis

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