Assessment of the Activity of Photocatalytic Paint Using a Simple Smart Ink Designed for High Activity Surfaces

A. Mills, C. O'Rourke, K. Lawrie, S. Elouali

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The use of an acid violet 7 (AV7) smart ink to assess the activity of photocatalytic paint is demonstrated. A linear correlation is established between the change in oxidized dye concentration, as measured by diffuse reflectance, and the change in the green component of the RGB color values, obtained using a portable hand-held scanner, suggesting that such tests can be monitored easily using an inexpensive piece of hand-held office equipment, as opposed to an expensive lab-based instrument, such as a diffuse reflectance UV/vis spectrophotometer. The bleaching of the AV7 follows first order kinetics, at a rate that is linearly dependent upon the UVA irradiance (0.30–3.26 mW cm–2). A comparison of relative rate of bleaching of the AV7 ink with the relative rate of removal of NOx, as determined using the ISO test (ISO 22197-1:2007), established a linear relationship between the two sets of results and the relevance of this correlation is discussed briefly.
Original languageEnglish
Pages (from-to)545-552, Impact Factor: 6.7
Number of pages8
JournalACS Applied Materials and Interfaces
Volume6
Early online date09 Dec 2013
DOIs
Publication statusPublished - 2014

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