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Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes

Title
Photocatalytic degradation mechanisms of CeO2/Tb2O3 nanotubes
Author
김태환
Keywords
CeO2/Tb2O3; Nanotubes; Transmission electron microscopy; Methylene Blue; Photocatalyst
Issue Date
2015-09
Publisher
ELSEVIER SCIENCE BV
Citation
APPLIED SURFACE SCIENCE, v. 349, Page. 459-464
Abstract
CeO2/Tb2O3 nanotubes (NTs) have been synthesized using the surfactant free co-precipitation method. High resolution transmission electron microscopy (HRTEM) images, X-ray spectroscopy (XPS) spectra, and energy dispersive X-ray (EDAX) profiles showed that the as-synthesized samples were CeO2/Tb2O3 NTs. The photocatalytic activity of the synthesized catalysts was evaluated by degrading Methylene blue (MB) under visible light irradiation. The fitting of the absorbance maximum as a function of time showed that the photodegradation of the MB followed pseudo-first-order reaction kinetics. The estimated rate constants for the CeO2 NPs and the CeO2/Tb2O3 NTs were found to be 0.0134 and 0.0317 min(-1), respectively. The photodegradation efficiency of CeO2/Tb2O3 nanotubes was 93% after 75 min, which was found to be higher than those of CeO2 NPs (66%). (C) 2015 Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S0169433215010727http://hdl.handle.net/20.500.11754/27507
ISSN
0169-4332; 1873-5584
DOI
10.1016/j.apsusc.2015.04.206
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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