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Article: Enhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation

TitleEnhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation
Authors
KeywordsPhotocatalytic degradation
Photolysis
Vacuum ultraviolet irradiation
Methylene blue
Mineralization
Issue Date2013
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cattod
Citation
Catalysis Today, 2013, v. 201, p. 189-194 How to Cite?
AbstractA vacuum ultraviolet (VUV) lamp was used as the irradiation of photocatalysis to enhance the degradation of methylene blue (MB), a model dye compound. In contrast to photocatalysis under 254 nm UV irradiation (UV/TiO 2), photocatalysis under VUV irradiation (VUV/TiO2) exhibited much higher efficiency in MB degradation and mineralization and needed less TiO2 dosage. The rate constant of MB degradation in VUV/TiO2 (0.0793 min-1) is about 4 times of that of UV/TiO2 (0.0205 min-1). The MB mineralization rate is also greatly increased from 12.5% in UV/TiO2 to 47.7% in VUV/TiO 2 after 60 min of irradiation. Multiple advanced oxidation processes including photocatalytic oxidation and VUV photo-oxidation coexist in VUV/TiO2 to substantially produce highly reactive species (such as OH and energetic photons), which is responsible for efficient degradation and mineralization of MB.
Persistent Identifierhttp://hdl.handle.net/10722/164245
ISSN
2023 Impact Factor: 5.2
2023 SCImago Journal Rankings: 1.022
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorHuang, H-
dc.contributor.authorLeung, YC-
dc.contributor.authorKwong, PCW-
dc.contributor.authorXiong, J-
dc.contributor.authorZhang, L-
dc.date.accessioned2012-09-20T07:56:50Z-
dc.date.available2012-09-20T07:56:50Z-
dc.date.issued2013-
dc.identifier.citationCatalysis Today, 2013, v. 201, p. 189-194-
dc.identifier.issn0920-5861-
dc.identifier.urihttp://hdl.handle.net/10722/164245-
dc.description.abstractA vacuum ultraviolet (VUV) lamp was used as the irradiation of photocatalysis to enhance the degradation of methylene blue (MB), a model dye compound. In contrast to photocatalysis under 254 nm UV irradiation (UV/TiO 2), photocatalysis under VUV irradiation (VUV/TiO2) exhibited much higher efficiency in MB degradation and mineralization and needed less TiO2 dosage. The rate constant of MB degradation in VUV/TiO2 (0.0793 min-1) is about 4 times of that of UV/TiO2 (0.0205 min-1). The MB mineralization rate is also greatly increased from 12.5% in UV/TiO2 to 47.7% in VUV/TiO 2 after 60 min of irradiation. Multiple advanced oxidation processes including photocatalytic oxidation and VUV photo-oxidation coexist in VUV/TiO2 to substantially produce highly reactive species (such as OH and energetic photons), which is responsible for efficient degradation and mineralization of MB.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cattod-
dc.relation.ispartofCatalysis Today-
dc.subjectPhotocatalytic degradation-
dc.subjectPhotolysis-
dc.subjectVacuum ultraviolet irradiation-
dc.subjectMethylene blue-
dc.subjectMineralization-
dc.titleEnhanced photocatalytic degradation of methylene blue under vacuum ultraviolet irradiation-
dc.typeArticle-
dc.identifier.emailHuang, H: harbor@hku.hk-
dc.identifier.emailLeung, YC: ycleung@hku.hk-
dc.identifier.authorityLeung, YC=rp00149-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.cattod.2012.06.022-
dc.identifier.scopuseid_2-s2.0-84870801341-
dc.identifier.hkuros209174-
dc.identifier.volume201-
dc.identifier.spage189-
dc.identifier.epage194-
dc.identifier.isiWOS:000311939200029-
dc.publisher.placeNetherlands-
dc.identifier.issnl0920-5861-

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