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dc.creatorStojadinović, Stevan
dc.creatorRadić, Nenad
dc.creatorGrbić, Boško
dc.creatorMaletic, Slavica
dc.creatorStefanov, Plamen
dc.creatorPacevski, Aleksandar
dc.creatorVasilic, Rastko
dc.date.accessioned2019-01-30T17:52:06Z
dc.date.available2019-01-30T17:52:06Z
dc.date.issued2016
dc.identifier.issn0169-4332
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/2034
dc.description.abstractIn this paper, we used plasma electrolytic oxidation (PEO) of titanium in water solution containing 10 g/L Na3PO4 center dot 12H(2)O + 2 g/L Eu2O3 powder for preparation of TiO2:Eu3+ coatings. The surfaces of obtained coatings exhibit a typical PEO porous structure. The energy dispersive X-ray spectroscopy analysis showed that the coatings are mainly composed of Ti, O, P, and Eu; it is observed that Eu content in the coatings increases with PEO time. The X-ray diffraction analysis indicated that the coatings are crystallized and composed of anatase and rutile TiO2 phases, with anatase being the dominant one. X-ray photoelectron spectroscopy revealed that Ti 2p spin-orbit components of TiO2:Eu3+ coatings are shifted towards higher binding energy, with respect to pure TiO2 coatings, suggesting that Eu3+ ions are incorporated into TiO2 lattice. Diffuse reflectance spectroscopy showed that TiO2:Eu3+ coatings exhibit evident red shift with respect to the pure TiO2 coatings. Photoluminescence (PL) emission spectra of TiO2:Eu3+ coatings are characterized by sharp emission bands in orange-red region ascribed to f-f transitions of Eu3+ ions from excited level D-5(0) to lower levels F-7(J) (J=0, 1, 2, 3, and 4). The excitation PL spectra of TiO2:Eu3+ coatings can be divided into two regions: the broad band region from 250 nm to 350 nm associated with charge transfer state of Eu3+ and the series of sharp peaks in the range from 350 nm to 550 rim corresponding to direct excitation of the Eu3+ ions. It is observed that the intensity of peaks in excitation and emission PL spectra increases with the concentration of Eu3+, but the peak positions remain practically unchanged. The ratio of PL emission for electric and magnetic dipole transitions indicates highly asymmetric environment around Eu3+ ions. The photocatalytic activity (PA) of TiO2:Eu3+ coatings is evaluated by measuring the photodegradation of methyl orange under simulated sunlight conditions. It is shown that PEO time, i.e., the amount of Eu3+ incorporated into coatings is an important factor affecting PA; TiO2:Eu3+ coating formed after 1 min of PEO time showed the highest PA.en
dc.publisherElsevier Science Bv, Amsterdam
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/171035/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172022/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172026/RS//
dc.rightsrestrictedAccess
dc.sourceApplied Surface Science
dc.subjectPlasma electrolytic oxidation (PEO)en
dc.subjectTiO2en
dc.subjectEu3+en
dc.subjectPhotoluminescenceen
dc.subjectPhotocatalysisen
dc.titleStructural, photoluminescent and photocatalytic properties of TiO2:Eu3+ coatings formed by plasma electrolytic oxidationen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractПацевски, Aлександар; Радић, Ненад; Грбић, Бошко; Василиц, Растко; Стефанов, Пламен; Стојадиновиц, Стеван; Малетиц, Славица;
dc.citation.volume370
dc.citation.spage218
dc.citation.epage228
dc.citation.other370: 218-228
dc.citation.rankaM21
dc.identifier.doi10.1016/j.apsusc.2016.02.131
dc.identifier.rcubConv_3516
dc.identifier.scopus2-s2.0-84959450080
dc.identifier.wos000374075000029
dc.type.versionpublishedVersion


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