NDLI: Selective photo-degradation of Rhodamine B over zirconia incorporated titania nanoparticles: a quantitative approach

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Catalysis Science & Technology Vol - 1 Issue - 1

Selective photo-degradation of Rhodamine B over zirconia incorporated titania nanoparticles: a quantitative approach

Content Provider	Royal Society of Chemistry (RSC)
Author	Lin, Ssu-Huei Ou, Chun-Chang Yang, Chung-Sung
Copyright Year	2011
Abstract	This study attempts to elucidate the selectivity of photo-degradation of Rhodamine B (Rh–B) over zirconia-incorporated TiO2 (ZIT) by UV light, through a comparison of the photocatalytic activities of pure TiO2 (Degussa P25) and ZIT nanoparticles. The incorporated atomic ratio of Zr/Ti in ZIT is chosen at three levels: i.e. Zr/Ti = 68.01% (maximum, denoted as ZIT-1), Zr/Ti = 15.94% (medium, denoted as ZIT-3), and Zr/Ti = 1.88% (minimum, denoted as ZIT-4). The selective photo-degradation of Rh–B over ZIT occurs in two routes. They are N-de-ethylation and de-carboxylation. The photo-degradation N-de-ethylation of Rh–B is generally observed in an anatase-structured titania domain. However, the photo-catalytic de-carboxylation of Rh–B has not been reported for the titania-based photocatalysts. The spectra deconvolution data of solid state FT-IR suggest that the ZrO2–TiO2 matrix is responsible for the photo-catalytic de-carboxylation of Rh–B. The typical photocatalytic rate constants (kcat) of Rh–B over P25 (0.389 min−1), ZIT-1 (0.945 min−1), ZIT-3 (1.755 min−1), and ZIT-4 (1.197 min−1) are in the ratio 0.22 : 0.51 : 1.00 : 0.68. The kcat of ZIT is 2.78 to 4.89 times that of P25. The highest catalytic efficiency is not achieved by the sample having the highest zirconia doping. Based on the experimental data, the optimal incorporation amount of ZrO2 in ZIT for photo-degradation of Rh–B is Zr/Ti = 15.94%.
Starting Page	295
Ending Page	307
Page Count	13
File Format	HTM / HTML PDF
ISSN	20444753
Volume Number	1
Issue Number	2
Journal	Catalysis Science & Technology
DOI	10.1039/c0cy00019a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Degussa Zirconium Deconvolution Dopant Rhodamine B Fourier-transform infrared spectroscopy Zirconium dioxide Composite material Evonik Industries
Content Type	Text
Resource Type	Article
Subject	Catalysis

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