Investigation of a TiO2 photocatalyst immobilized with poly(vinyl alcohol)

Hegedűs, Péter and Szabó-Bárdos, Erzsébet and Horváth, Ottó and Szabó, Péter and Horváth, Krisztián (2017) Investigation of a TiO2 photocatalyst immobilized with poly(vinyl alcohol). Catalysis Today, 284. pp. 179-186. ISSN 0920-5861

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Abstract

Immobilization of TiO2 photocatalyst was realized with application of poly(vinyl alcohol) (PVA). However, these PVA-based foils were too instable to be used for photocatalytic water cleaning. Their stability could be significantly enhanced by a thermal treatment, but this procedure generated various water-soluble derivatives such as aldehydes, ketones, and aromatic species. Photocatalytic pre-treatment of the foils proved to be suitable to remove these products from the surface of the composite. After three subsequent pre-treating cycles of irradiation and rinsing, the PVA-TiO2 foil became applicable for photocatalytic degradation of Triton X-100, a widely used non-ionic detergent. The composite catalyst kept its stability and efficiency even after some cycles of re-usage, while its surface underwent a perceptible, although quantitatively negligible degradation.

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