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Please use this identifier to cite or link to this item: http://hdl.handle.net/10023/3004
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Title: Synthesis of visible-light-activated yellow amorphous TiO2 photocatalyst
Authors: Randorn, Chamnan
Irvine, John Thomas Sirr
Robertson, Peter
Keywords: Methylene-blue
Titanium-oxide
Anatase
SRTIO3
Degredation
System
Water
QD Chemistry
Issue Date: 2008
Citation: Randorn , C , Irvine , J T S & Robertson , P 2008 , ' Synthesis of visible-light-activated yellow amorphous TiO 2 photocatalyst ' International Journal of Photoenergy , vol 2008 , 426872 .
Abstract: Visible-light-activated yellow amorphous TiO2 (yam-TiO2) was synthesised by a simple and organic-free precipitation method. TiN, an alternative precursor for TiO2 preparation, was dissolved in hydrogen peroxide under acidic condition ( pH similar to 1) adjusted by nitric acid. The yellow precipitate was obtained after adjusting pH of the resultant red brown solution to 2 with NH4OH. The BET surface area of this sample was 261 m(2)/g. The visible light photoactivity was evaluated on the basis of the photobleaching of methylene blue (MB) in an aqueous solution by using a 250 W metal halide bulb equipped with UV cutoff filter (lambda > 420 nm) under aerobic conditions. Yam-TiO2 exhibits an interesting property of being both surface adsorbent and photoactive under visible light. It was assigned to the eta(2)-peroxide, an active intermediate form of the addition of H2O2 into crystallined TiO2 photocatalyst. It can be concluded that an active intermediate form of titanium peroxo species in photocatalytic process can be synthesised and used as a visible-light-driven photocatalyst. Copyright (C) 2008 Chamnan Randorn et al.
Version: Publisher PDF
Status: Peer reviewed
URI: http://hdl.handle.net/10023/3004
DOI: http://dx.doi.org/10.1155/2008/426872
ISSN: 1110-662X
Type: Journal article
Rights: Copyright © 2008 Chamnan Randorn et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Appears in Collections:University of St Andrews Research
Chemistry Research



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