UV-Activated LuminescenceColourimetric O2 Indicator
Joint Authors
Bailey, Raymond T.
Tedford, M. Catriona
Tommons, Cheryl
Crilly, Peter J.
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
2008-04-01
Country of Publication
Egypt
No. of Pages
6
Main Subjects
Abstract EN
An oxygen indicator is described, comprising nanoparticles of titania dispersed in hydroxyethyl cellulose (HEC) polymer film containing a sacrificial electron donor, glycerol, and the redox indicator, indigo-tetrasulfonate (ITS).
The indicator is blue- coloured in the absence of UV light, however upon exposure to UV light it not only loses its colour but also luminesces, unless and until it is exposed to oxygen, whereupon its original colour is restored.
The initial photobleaching spectral (absorbance and luminescence) response characteristics in air and in vacuum are described and discussed in terms of a simple reaction scheme involving UV activation of the titania photocatalyst particles, which are used to reduce the redox dye, ITS, to its leuco form, whilst simultaneously oxidising the glycerol to glyceraldehye.
The response characteristics of the activated, that is, UV photobleached, form of the indicator to oxygen are also reported and the possible uses of such an indicator to measure ambient O2 levels are discussed.
American Psychological Association (APA)
Mills, Andrew& Tommons, Cheryl& Bailey, Raymond T.& Tedford, M. Catriona& Crilly, Peter J.. 2008. UV-Activated LuminescenceColourimetric O2 Indicator. International Journal of Photoenergy،Vol. 2008, no. 2008, pp.1-6.
https://search.emarefa.net/detail/BIM-987937
Modern Language Association (MLA)
Mills, Andrew…[et al.]. UV-Activated LuminescenceColourimetric O2 Indicator. International Journal of Photoenergy No. 2008 (2008), pp.1-6.
https://search.emarefa.net/detail/BIM-987937
American Medical Association (AMA)
Mills, Andrew& Tommons, Cheryl& Bailey, Raymond T.& Tedford, M. Catriona& Crilly, Peter J.. UV-Activated LuminescenceColourimetric O2 Indicator. International Journal of Photoenergy. 2008. Vol. 2008, no. 2008, pp.1-6.
https://search.emarefa.net/detail/BIM-987937
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-987937