Journal
CATALYSIS TODAY
Volume 284, Issue -, Pages 179-186Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2016.11.050
Keywords
TiO2 based photocatalysis; Immobilization; Thermal decomposition of PVA; Organic pollutant; Triton X-100
Funding
- National Research, Development and Innovation Office [OTKA K101141]
- Szechenyi [GINOP-2.3.2-15-2016-00016]
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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. (C) 2016 Elsevier B.V. All rights reserved.
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