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• W2083048360 abstract "Abstract One of the most important applications of nanostructured TiO 2 is the manufacture of self-cleaning textiles. It is believed that the self-cleaning properties originate from the photocatalysis of water by nanostructured TiO 2 , but the mechanisms acting on textiles, and particularly the phenomena occurring at the interface, are not fully understood yet. A comparative study is proposed here to investigate the photocatalytic activity and the efficiency of modified TiO 2 nanomaterials with the purpose to identify the most suitable analytical method to probe photocatalysis in self-cleaning textiles. The present study sets up reliable, robust, fast and low-cost tests and compares them using TiO 2 /SiO 2 nanocomposite systems with different SiO 2 contents. The photocatalytic activity and efficiency of these nanocomposites were benchmarked by three different experimental protocols: a recently developed electrochemical technique to determine hydroxyl radicals ( OH) and two well-known methods, namely trapping of OH radicals by salicylic acid and degradation of Rhodamine B dye due to photocatalytic actions. The results suggest that the photoactivity of TiO 2 incorporated in textiles is mainly related to a direct reactivity of the surface oxidizing carriers toward the organic target molecule. The salicylic acid and Rhodamine B test provide mutually consistent results drawing similar trends of the photocatalytic performance. The electrochemical method turns to be a valid alternative when photocatalytic reactivity is driven by OH radicals diffused in a liquid medium. For self-cleaning textile applications, the salicylic acid test provides a more reliable quantitative prediction of the photocatalytic activity, while the Rhodamine B test represents a robust qualitative indicator." @default.
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• W2083048360 date "2014-10-01" @default.
• W2083048360 modified "2023-09-27" @default.
• W2083048360 title "Multiple approach to test nano TiO2 photo-activity" @default.
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• W2083048360 doi "https://doi.org/10.1016/j.jphotochem.2014.07.006" @default.
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