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Sensitization of photocatalytic activity of S- or N-doped TiO2 particles by adsorbing Fe3+ cations

Paper ID Volume ID Publish Year Pages File Format Full-Text
43879 45993 2006 7 PDF Available
Title
Sensitization of photocatalytic activity of S- or N-doped TiO2 particles by adsorbing Fe3+ cations
Abstract

A new method to dope Fe3+ ions only onto the surface of S- or N-doped TiO2 is proposed. The photocatalytic activities of Fe3+ ions adsorbed on S- or N-doped TiO2 photocatalysts for oxidation of 2-propanol are markedly improved compared to those of S- or N-doped TiO2 without treatment of Fe3+ ions under a wide range of incident light wavelengths, including UV light and visible light. When the amount of Fe3+ ions adsorbed on S-doped TiO2 particles was 0.90 wt.%, photocatalytic activity reached maximum. In the case of N-doped TiO2 with Fe3+ ions, the optimum amount of Fe3+ ions was 0.36 wt.%. The photocatalytic activities of Fe3+ ions adsorbed on S- or N-doped TiO2 photocatalysts decreased gradually when the amount of Fe3+ ions was greater than 1.0 wt.%. In addition, when S- or N-doped TiO2 photocatalysts adsorbed with Fe3+ ions was observed after reduction by NaBH4 followed by air oxidation, further improvement in their photocatalytic activities were observed. In this case, the optimum amounts of Fe3+ adsorbed on the surfaces of S- and N-doped TiO2 photocatalysts were 2.81 and 0.88 wt.%, respectively. During the treatment, Fe3+ ions adsorbed on S- or N-doped TiO2 were reduced to generate metal Fe, and Fe was reoxidized again to form Fe3+ ions under an aerated condition. After the treatment, the crystal structure of Fe3+ ions adsorbed on S-doped TiO2 and adsorbtivity of 2-propanol on the photocatalyst were changed.

Keywords
Photocatalysts; Titanium dioxide; Visible light; S-doped TiO2; N-doped TiO2; Fe3+ ions; Reduction and oxidation
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Sensitization of photocatalytic activity of S- or N-doped TiO2 particles by adsorbing Fe3+ cations
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 302, Issue 1, 21 March 2006, Pages 62–68
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us