TITLE

Photocatalytic degradation mechanisms of self-assembled rose-flower-like CeO2 hierarchical nanostructures

AUTHOR(S)
Sabari Arul, N.; Mangalaraj, D.; Whan Kim, Tae
PUB. DATE
June 2013
SOURCE
Applied Physics Letters;6/3/2013, Vol. 102 Issue 22, p223115
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Hierarchical rose-flower-like CeO2 nanostructures were formed by using solvothermal and thermal annealing processes. The CeCO3OH thin film was transformed into CeO2 roses due to thermal annealing. CeO2 nanostructured roses exhibited excellent photocatalytic activity with a degradation rate of 65% for the azo dye acid orange 7 (AO7) under ultraviolet illumination. The fitting of the absorbance maximum versus time showed that the degradation of AO7 obeyed pseudo-first-order reaction kinetics. The enhancement of the photocatalytic activity for the CeO2 roses was attributed to the high adsorptivity resulting from the surface active sites and special 4f electron configuration.
ACCESSION #
88041311

 

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