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Enhanced visible light photocatalytic activity of Pt/I-TiO2 in a slurry system and supported on glass packing
Abstract
Highly photoactive I/TiO2, Pt/I-TiO2 nanocomposites were obtained using a hydrothermal and wet impregnation method. The incorporation of iodine and modification with 0.05 mol% of platinum leads to enhanced photocatalytic activity as compared to singly doped TiO2 due to the presence of impurity energy level in the structure of TiO2. X-ray diffraction, TEM microscopy, UV–Vis spectroscopy, X-ray photoelectron spectroscopy and BET methods showed that the most active photocatalyst had anatase structure, 187 m2/g specific surface area, absorbed UV–Vis light and contained 3 nm platinum particles. XPS analysis revealed that iodine exists in the form of I¯ and IO3¯ species and platinum was present as Pt and PtO2. The photocatalytic activity of Pt/I-TiO2 nanocomposite was maintained after 4 runs, suggesting stability and reusability of the obtained photocatalyst. The efficiency of degradation of model organic compound was measured in a slurry type photoreactor as well as in a fixed-bed photoreactor equipped with parabolic mirror with Pt/I-TiO2 immobilized on glass beads or glass Raschig rings.
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Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
SEPARATION AND PURIFICATION TECHNOLOGY
pages 246 - 252,
ISSN: 1383-5866 - Language:
- English
- Publication year:
- 2017
- Bibliographic description:
- Zielińska-Jurek A., Klein M., Hupka J.: Enhanced visible light photocatalytic activity of Pt/I-TiO2 in a slurry system and supported on glass packing// SEPARATION AND PURIFICATION TECHNOLOGY. -, nr. 189 (2017), s.246-252
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.seppur.2017.08.018
- Verified by:
- Gdańsk University of Technology
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