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Comparative study on photocatalytic performances of crystalline alpha- and beta-Bi2O3 nanoparticles under visible light

Title
Comparative study on photocatalytic performances of crystalline alpha- and beta-Bi2O3 nanoparticles under visible light
Author
박재근
Keywords
alpha- & beta-Bi2O3; Photocatalyst; Photodegradation; Organic contamination
Issue Date
2015-10
Publisher
ELSEVIER SCIENCE INC
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v. 30, Page. 183-189
Abstract
alpha- and beta-Bi2O3 nanoparticles were synthesized in the presence of either urea or polyethylene glycol. The XRD, TEM, and Raman analysis indicated that alpha-(monoclinic)Bi2O3 nanoparticles were obtained using either' sol-gel or hydrothermal method in the presence of urea; however beta-(tetragonal) phase of Bi2O3 was formed using hydrothermal method in the presence of polyethylene glycol. The beta-Bi2O3 nanoparticles exhibited higher photocatalytic activity than alpha-Bi2O3. MB was completely photodegraded after 6 h of visible light illumination using beta-Bi2O3 photocatalyst whereas only 30% was photodegraded using alpha-Bi2O3. The photodegradation rate of beta-Bi2O3 was 5.7 times greater than that alpha-Bi2O3 nanoparticles. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S1226086X15002579?via%3Dihubhttp://hdl.handle.net/20.500.11754/28067
ISSN
1226-086X; 1876-794X
DOI
10.1016/j.jiec.2015.05.020
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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