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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
Joint Authors
Hepburn, James
Wang, Jishun
McGrady, Mark
Mills, Andrew
Source
International Journal of Photoenergy
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-6, 6 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-03-27
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
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.
4.8 mW 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.
1.8×10−3.
American Psychological Association (APA)
Mills, Andrew& McGrady, Mark& Wang, Jishun& Hepburn, James. 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،Vol. 2008, no. 2008, pp.1-6.
https://search.emarefa.net/detail/BIM-987932
Modern Language Association (MLA)
Mills, Andrew…[et al.]. 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 No. 2008 (2008), pp.1-6.
https://search.emarefa.net/detail/BIM-987932
American Medical Association (AMA)
Mills, Andrew& McGrady, Mark& Wang, Jishun& Hepburn, James. 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. 2008. Vol. 2008, no. 2008, pp.1-6.
https://search.emarefa.net/detail/BIM-987932
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-987932