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Article: Photocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation

TitlePhotocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiation
Authors
KeywordsAir pollutants
Byproducts
Escherichia coli
Photocatalysis
Toluene
Vacuum ultraviolet irradiation
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cattod
Citation
Catalysis Today, 2011, v. 175 n. 1, p. 310-315 How to Cite?
AbstractPhotocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO 2 (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. © 2011 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/139399
ISSN
2015 Impact Factor: 4.312
2015 SCImago Journal Rankings: 1.348
ISI Accession Number ID
Funding AgencyGrant Number
CRCG of the University of Hong Kong200907176159
Funding Information:

The authors gratefully acknowledge the financial supports from the CRCG of the University of Hong Kong (Grant No. 200907176159).

References

 

DC FieldValueLanguage
dc.contributor.authorHuang, Hen_HK
dc.contributor.authorLeung, DYCen_HK
dc.contributor.authorLi, Gen_HK
dc.contributor.authorLeung, MKHen_HK
dc.contributor.authorFu, Xen_HK
dc.date.accessioned2011-09-23T05:49:09Z-
dc.date.available2011-09-23T05:49:09Z-
dc.date.issued2011en_HK
dc.identifier.citationCatalysis Today, 2011, v. 175 n. 1, p. 310-315en_HK
dc.identifier.issn0920-5861en_HK
dc.identifier.urihttp://hdl.handle.net/10722/139399-
dc.description.abstractPhotocatalysis with vacuum ultraviolet (VUV) irradiation (VUV-PCO) was utilized to destroy air pollutants. Escherichia coli (E. coli) and toluene were chosen as the target pollutants. Two parallel reactions with 254nm UV irradiation (254nm-PCO) and without TiO 2 (i.e. VUV photolysis) were also conducted for comparison. Results indicate that VUV-PCO process has a higher efficiency in destroying toluene and inactivating E. coli. In addition, the stability of PCO activity is increased while the byproducts yield is lowered during toluene destruction in the VUV-PCO process. Toluene removal efficiency (TRE) in the VUV-PCO process was more than 5 times higher than that in the 254nm-PCO process. VUV-PCO overcomes some drawbacks of conventional photocatalysis, such as low efficiency and easy photocatalyst deactivation. The destroying mechanism of air pollutants in the VUV-PCO process is greatly different from that of the 254 nm-PCO process. The excellent performance of VUV-PCO system may be attributed to the more reaction processes (such as VUV photolysis and catalytic ozonation) and more reactive species (such as active oxygen and hydroxyl radicals) formed to destroy the pollutants. © 2011 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cattoden_HK
dc.relation.ispartofCatalysis Todayen_HK
dc.subjectAir pollutantsen_HK
dc.subjectByproductsen_HK
dc.subjectEscherichia colien_HK
dc.subjectPhotocatalysisen_HK
dc.subjectTolueneen_HK
dc.subjectVacuum ultraviolet irradiationen_HK
dc.titlePhotocatalytic destruction of air pollutants with vacuum ultraviolet (VUV) irradiationen_HK
dc.typeArticleen_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hken_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cattod.2011.04.015en_HK
dc.identifier.scopuseid_2-s2.0-80054867588en_HK
dc.identifier.hkuros195033en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80054867588&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume175en_HK
dc.identifier.issue1en_HK
dc.identifier.spage310en_HK
dc.identifier.epage315en_HK
dc.identifier.isiWOS:000295735400044-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridHuang, H=24080074500en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridLi, G=54383687100en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK
dc.identifier.scopusauthoridFu, X=35214986500en_HK
dc.identifier.citeulike9320582-

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