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A rapid method of assessing the photocatalytic activity of thin tio2 films using an ink based on the redox dye 2,6-dichloroindophenol

Mills, A. and McGrady, M. and Wang, J. and Hepburn, J. (2008) A rapid method of assessing the photocatalytic activity of thin tio2 films using an ink based on the redox dye 2,6-dichloroindophenol. International Journal of Photoenergy (Article Number: 504945). ISSN 1110-662X

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Abstract

An indicator ink based on the redox dye 2,6-dichloroindophenol ( DCIP) is described, which allows the rapid assessment of the activity of thin, commercial photocatalytic films, such as Activ. The ink works via a photoreductive mechanism, DCIP being reduced to dihydro-DCIP within ca. 7.5 minutes exposure to UVA irradiation of moderate intensity ( ca. 4.8mW cm(-2)). The kinetics of photoreduction are found to be independent of the level of dye present in the ink formulation, but are highly sensitive to the level of glycerol. This latter observation may be associated with a solvatochromic effect, whereby the microenvironment in which the dye finds itself and, as a consequence, its reactivity is altered significantly by small changes in the glycerol content. The kinetics of photoreduction also appear linearly dependent on the UVA light intensity with an observed quantum efficiency of ca. 1.8 x 10(-3). Copyright (C) 2008.

Item type: Article
ID code: 17079
Notes: http://suprimo.lib.strath.ac.uk/primo_library/libweb/action/search.do?scp.scps=scope%3A(SU)&srt=rank&tab=local&mode=Basic&dum=true&fn=search&frbg=&dstmp=1272382849745&dscnt=0&ct=search&vid=SUVU01&indx=1&vl(freeText0)=International%20journal%20of%20photoenergy&vl(54032236UI0)=lsr02&vl(96071691UI1)=all_items
Keywords: TITANIUM-DIOXIDE, SURFACE-STRUCTURE, PHOTODEGRADATION, INDICATOR, Chemistry, Physical and theoretical chemistry, Materials Science(all), Atomic and Molecular Physics, and Optics, Chemistry(all), Renewable Energy, Sustainability and the Environment
Subjects: Science > Chemistry
Science > Chemistry > Physical and theoretical chemistry
Department: Faculty of Science > Pure and Applied Chemistry
Related URLs:
    Depositing user: Strathprints Administrator
    Date Deposited: 27 Apr 2010 16:41
    Last modified: 05 Sep 2014 01:56
    URI: http://strathprints.strath.ac.uk/id/eprint/17079

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