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Article: Highly thermal stable and highly crystalline anatase TiO 2 for photocatalysis

TitleHighly thermal stable and highly crystalline anatase TiO 2 for photocatalysis
Authors
Issue Date2009
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/est
Citation
Environmental Science And Technology, 2009, v. 43 n. 14, p. 5423-5428 How to Cite?
AbstractIn the absence of any doping and modification, the anatase-to-rutile phase transformation was inhibited at high temperatures giving rise to highly thermal stable and highly crystalline anatase TiO 2 fibers. The initial formation of the TiO 2(B) phase is found tobekey in inhibiting this transformation.Theintermediate structure of the TiO 2 fiber comprises an inner anatase core with an outer TiO 2(B) shell, which has a specific crystallographic orientation with respect to the anatase structure. During the calcination process from 300 to 800°C, both the TiO 2(B) shell and the bulk anatase crystal structure was preserved. At temperatures of 800-900°C the TiO 2(B)-to-anatase transformation was finished and a near-pure and thermally stable anatase fiber was obtained. This final product shows the same activity as a standard commercial photocatalyst Degussa P-25 when measured against unit mass, and 5 times the activity when measured with respect to the unit surface area. The anatase TiO 2 fibers presented here have considerable interest as practical photocatalysts for water purification, as they can be easily recycled without a decrease in their photocatalytic activity and can be prepared at large scale and at low cost. © 2009 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/70454
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
Funding AgencyGrant Number
NSFC-RGC20731160614
HKU 735/07
Changjiang Scholars and Innovative Research Team in UniversityIRT0732
NSFC20428606
20236010
20676062
20736002
20706029
20706028
Funding Information:

The collaborative research between Nanjing University of Technology and The University of Hong Kong was assisted by a NSFC-RGC Joint Research Award (20731160614 and HKU 735/07). We also thank the support by Changjiang Scholars and Innovative Research Team in University (IRT0732), Joint Research Fund of NSFC for Young Scholars Abroad (20428606), and Fund of NSFC (20236010, 20676062, 20736002, 20706029, and 20706028),

References

 

DC FieldValueLanguage
dc.contributor.authorLi, Wen_HK
dc.contributor.authorBai, Yen_HK
dc.contributor.authorLiu, Cen_HK
dc.contributor.authorYang, Zen_HK
dc.contributor.authorFeng, Xen_HK
dc.contributor.authorLu, Xen_HK
dc.contributor.authorVan Der Laak, NKen_HK
dc.contributor.authorChan, KYen_HK
dc.date.accessioned2010-09-06T06:23:02Z-
dc.date.available2010-09-06T06:23:02Z-
dc.date.issued2009en_HK
dc.identifier.citationEnvironmental Science And Technology, 2009, v. 43 n. 14, p. 5423-5428en_HK
dc.identifier.issn0013-936Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70454-
dc.description.abstractIn the absence of any doping and modification, the anatase-to-rutile phase transformation was inhibited at high temperatures giving rise to highly thermal stable and highly crystalline anatase TiO 2 fibers. The initial formation of the TiO 2(B) phase is found tobekey in inhibiting this transformation.Theintermediate structure of the TiO 2 fiber comprises an inner anatase core with an outer TiO 2(B) shell, which has a specific crystallographic orientation with respect to the anatase structure. During the calcination process from 300 to 800°C, both the TiO 2(B) shell and the bulk anatase crystal structure was preserved. At temperatures of 800-900°C the TiO 2(B)-to-anatase transformation was finished and a near-pure and thermally stable anatase fiber was obtained. This final product shows the same activity as a standard commercial photocatalyst Degussa P-25 when measured against unit mass, and 5 times the activity when measured with respect to the unit surface area. The anatase TiO 2 fibers presented here have considerable interest as practical photocatalysts for water purification, as they can be easily recycled without a decrease in their photocatalytic activity and can be prepared at large scale and at low cost. © 2009 American Chemical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/esten_HK
dc.relation.ispartofEnvironmental Science and Technologyen_HK
dc.subject.meshHot Temperature-
dc.subject.meshPhotochemistry - methods-
dc.subject.meshPhotosensitizing Agents - chemistry-
dc.subject.meshTitanium - chemistry-
dc.subject.meshWater Pollutants, Chemical - chemistry-
dc.titleHighly thermal stable and highly crystalline anatase TiO 2 for photocatalysisen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0013-936X&volume=43&issue=14&spage=5423&epage=5428&date=2009&atitle=Highly+thermal+stable+and+highly+crystalline+anatase+TiO2+for+photocatalysisen_HK
dc.identifier.emailVan Der Laak, NK: n.vanderlaak@gmail.comen_HK
dc.identifier.emailChan, KY: hrsccky@hku.hken_HK
dc.identifier.authorityVan Der Laak, NK=rp00795en_HK
dc.identifier.authorityChan, KY=rp00662en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/es8037005en_HK
dc.identifier.pmid19708376-
dc.identifier.scopuseid_2-s2.0-67650496171en_HK
dc.identifier.hkuros162411en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67650496171&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume43en_HK
dc.identifier.issue14en_HK
dc.identifier.spage5423en_HK
dc.identifier.epage5428en_HK
dc.identifier.isiWOS:000268138000043-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, W=15073077300en_HK
dc.identifier.scopusauthoridBai, Y=36084084600en_HK
dc.identifier.scopusauthoridLiu, C=36063391100en_HK
dc.identifier.scopusauthoridYang, Z=7405433667en_HK
dc.identifier.scopusauthoridFeng, X=34769676900en_HK
dc.identifier.scopusauthoridLu, X=7404839077en_HK
dc.identifier.scopusauthoridVan Der Laak, NK=13404932900en_HK
dc.identifier.scopusauthoridChan, KY=7406034142en_HK

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