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Three photocatalyst inks based on the redox dyes, Resazurin (Rz), Basic Blue 66 (BB66) and Acid Violet 7 (AV7), are used to assess the photocatalytic activities of a variety of different materials, such as commercial paint, tiles and glass and laboratory made samples of sol–gel coated glass and paint, which collectively exhibit a wide range of activities that cannot currently be probed by any one...
A rapid, semi-quantitative, inexpensive method, using a simple digital scanner and an indicator ink, suitable for use in the laboratory, or in the field, for assessing the photocatalytic activity of commercial photocatalytic self-cleaning materials, such as glass, is described. The repeatability of the current method is found to be high and better than many of the previously reported ISO photocatalyst...
Milling changes the particle size distribution of TiO 2 suspensions and this is reflected in the changed optical characteristics. Typically, the visible transmission is increased, as large TiO 2 agglomerates are broken down, and the UV absorption is increased. It has been shown that the rates of dye decolouration, alcohol oxidation, and carboxylic acid degradation are all changed by...
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