Photocatalytic degradation of acid orange 7 using Cr-doped CeO2 nanorods

Cr-doped CeO 2 nanorods were prepared by a co-precipitation method using cerium and chromium nitrates with ammonia solution as the precipitator. The morphology and structure of the synthesized products were characterized by field emission scanning electron microscope, X-ray diffraction, and transmis...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2015-03, Vol.26 (3), p.1441-1448
Main Authors: Arul, Narayanasamy Sabari, Mangalaraj, Devanesan, Han, Jeong In
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Materials Science
Optical and Electronic Materials
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Summary:Cr-doped CeO 2 nanorods were prepared by a co-precipitation method using cerium and chromium nitrates with ammonia solution as the precipitator. The morphology and structure of the synthesized products were characterized by field emission scanning electron microscope, X-ray diffraction, and transmission electron microscopy. The specific surface area of the Cr-doped CeO 2 nanorods (455 m 2  g −1 ) is higher than those of CeO 2 nanoparticles (52 m 2  g −1 ). X-ray photoemission spectroscopy spectrum confirms the presence of Cr in CeO 2 nanorods. UV–Vis spectra analyzes showed that the Cr-doped CeO 2 nanorods exhibit the absorption band in the visible region. The synthesized products exhibited good photocatalytic activity for the degradation of acid orange 7 under UV–visible light illumination and the pseudo-first order reaction rate constant ( k ) of 0.250 h −1 for Cr-doped CeO 2 nanorods is higher than 0.142 h −1 of CeO 2 nanoparticles.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-014-2559-x