File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

이창하

Lee, Changha
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Kinetic enhancement in photocatalytic oxidation of organic compounds by WO3 in the presence of Fenton-like reagent

Author(s)
Lee, HongshinChoi, JihyunLee, SeokheonYun, Seong-TaekLee, ChanghaLee, Jaesang
Issued Date
2013-07
DOI
10.1016/j.apcatb.2013.03.006
URI
https://scholarworks.unist.ac.kr/handle/201301/3464
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84875637123
Citation
APPLIED CATALYSIS B-ENVIRONMENTAL, v.138-139, pp.311 - 317
Abstract
WO3-mediated photocatalytic oxidation is achievable in the presence of electron acceptors as an alternative to O-2 or co-catalysts enabling O-2 reduction pathway. This study suggests the combination with Fenton-like reagent (Fe(III)/H2O2) as a strategy to improve the photocatalytic activity of WO3. Under neutral pH condition where Fe(III) is present as iron oxide precipitate, photocatalytic degradation of 4-chlorophenol (4-CP) proceeded 3-fold faster in the WO3/Fe(III)/H2O2 system relative to the WO3/H2O2 system, while no noticeable oxidation occurred in the systems of Fe(III)/H2O2, WO3, and WO3/Fe(III). Such efficacy increase at circumneutral pH was observed in photocatalytic oxidation of diverse organics including phenol, bisphenol A, acetaminophen, and carbamazepine. Compatible with the pH dependence of photocatalytic activity of the WO3/Fe(III)/H2O2 system, hydroxylation of benzoic acid and coumarin as indirect indication for OH radical production was drastically retarded with increasing pH. The pH effect indicates that OH radical as primary oxidant may be responsible for the kinetic enhancement in the WO3/Fe(III)/H2O2 system. In that platinum deposits or Nafion layers as physical barriers possibly inhibit surface Fe(III) precipitation, use of platinized or Nafion-coated WO3 caused the negligible photocatalytic improvement in the ternary system. Effective oxidative degradation in the presence of the UV cut-off filter corroborated visible light activation of the WO3/Fe(III)/H2O2 system.
Publisher
ELSEVIER SCIENCE BV
ISSN
0926-3373
Keyword (Author)
PhotocatalysisTungsten oxideFenton reactionAdvanced oxidation technologyVisible light activity
Keyword
ZERO-VALENT IRONVISIBLE-LIGHT IRRADIATIONWO3-CATALYZED PHOTODEGRADATIONSEMICONDUCTOR PHOTOCATALYSISTIO2 PHOTOCATALYSISHYDROXYL RADICALSHYDROGEN-PEROXIDECIRCUMNEUTRAL PHDEGRADATIONOXYGEN

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.