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Effects of Cu, Zn and Cu-Zn addition on the microstructure and antibacterial and photocatalytic functional properties of Cu-Zn modified TiO2 nano-heterostructures

2016Journal article Restricted access
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dc.contributor.authorTobaldi, D. M.
dc.contributor.authorPiccirillo, C.
dc.contributor.authorRozman, N.
dc.contributor.authorPullar, R. C.
dc.contributor.authorSeabra, M. P.
dc.contributor.authorŠkapin, A. Sever
dc.contributor.authorCastro, Paula M. L.
dc.contributor.authorLabrincha, J. A.
dc.date.accessioned2017-10-16T15:07:32Z
dc.date.available2017-10-16T15:07:32Z
dc.date.issued2016
dc.description.abstractTitanium dioxide (TiO2) is well established as one of the most common photocatalysts used for many environmental, anti-pollution and antibacterial applications. However, in this work, novel photocatalytic TiO2 nanopowders were modified with additions of 1 mol% copper, zinc or copper + zinc (with various Cu: Zn ratios). These were prepared via a green sol–gel route and thermally treated at 450 C. For the first time, a direct comparison of the effects of these two modifying agents was performed, both as single and co-substitution. The compounds were thoroughly characterised by means of advanced X-ray diffraction (Whole Powder Pattern Modelling, WPPM) and spectroscopic methods (Raman and UV–vis). For functional properties, the photocatalytic activity in the gas-solid phase (nitrous oxides (NOx) and isopropanol degradation (VOCs)) was tested under UV and visible light, and antibacterial activity against Gram positive and Gram negative bacterial strains was also investigated. Neither copper nor zinc entered into the TiO2 structure, but nucleated as oxides at the surface of titania nanoparticles, thus creating a nano-heterojunction between the semiconductor materials; this also retarded the anatase-to-rutile phase transition. When comparing and contrasting their functional properties, it was found that Zn modification gave greater photocatalytic activity than that with Cu. On the contrary, for antibacterial activity, copper was shown to be a better additive. Co-modification with both metals did not improve the antibacterial behaviour, but did lead to an increase in photocatalytic activity in some cases.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTOBALDI, D.M.; PICCIRILLO, C.; ROZMAN, N.; PULLAR, R. C.; SEABRA, M. P.; ŠKAPIN, A. Sever; CASTRO, Paula M. L.; LABRINCHA, J. A. - Effects of cu, zn and cu-zn addition on the microstructure and antibacterial and photocatalytic functional properties of cu-zn modified TiO2 nano-heterostructures. Journal of Photochemistry and Photobiology A: Chemistry. ISSN 1010-6030. Vol. 330 (2016), p. 44-54pt_PT
dc.identifier.doi10.1016/j.jphotochem.2016.07.016pt_PT
dc.identifier.eid84979530031
dc.identifier.urihttp://hdl.handle.net/10400.14/23115
dc.identifier.wos000383295300007
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevier
dc.relationSFRH/BPD/86843/2012pt_PT
dc.relationENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
dc.titleEffects of Cu, Zn and Cu-Zn addition on the microstructure and antibacterial and photocatalytic functional properties of Cu-Zn modified TiO2 nano-heterostructurespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleENVIRONMENTALLY SUSTAINABLE CERAMICS FOR APPLICATIONS AS MULTIFUNCTIONAL PHOTOCATALYST
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/FARH/SFRH%2FBPD%2F97115%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F50011%2F2013/PT
oaire.citation.endPage54
oaire.citation.startPage44
oaire.citation.titleJournal of Photochemistry and Photobiology A: Chemistrypt_PT
oaire.citation.volume330
oaire.fundingStreamFARH
oaire.fundingStream5876
person.familyNameTobaldi
person.familyNamePiccirillo
person.familyNamePullar
person.familyNameSeabra
person.familyNameCastro
person.familyNameLabrincha
person.givenNameDavid Maria
person.givenNameClara
person.givenNameRobert
person.givenNameMaria Paula
person.givenNamePaula
person.givenNameJoao
person.identifier962551
person.identifier646900
person.identifier2013444
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person.identifier.ciencia-idD51F-B2C3-B82C
person.identifier.ciencia-id9D15-3812-6C0C
person.identifier.ciencia-id7C1F-6C72-354A
person.identifier.ciencia-idD819-2C2C-7A16
person.identifier.orcid0000-0002-0112-8570
person.identifier.orcid0000-0002-6339-716X
person.identifier.orcid0000-0001-6844-4482
person.identifier.orcid0000-0002-5174-7433
person.identifier.orcid0000-0001-8841-6606
person.identifier.orcid0000-0003-4782-1685
person.identifier.ridN-8206-2013
person.identifier.ridH-3640-2013
person.identifier.ridM-8241-2013
person.identifier.ridB-3984-2010
person.identifier.scopus-author-id16319626100
person.identifier.scopus-author-id7004621626
person.identifier.scopus-author-id7003296532
person.identifier.scopus-author-id7004369655
person.identifier.scopus-author-id7102781782
person.identifier.scopus-author-id7003372169
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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