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dc.creatorMarković, Smilja
dc.creatorRajić, Vladimir
dc.creatorStanković, Ana
dc.creatorVeselinović, Ljiljana
dc.creatorBelošević Čavor, Jelena
dc.creatorBatalović, Katarina
dc.creatorAbazović, Nadica
dc.creatorŠkapin, Srečo Davor
dc.creatorUskoković, Dragan
dc.date.accessioned2018-04-11T10:12:04Z
dc.date.available2018-04-11T10:12:04Z
dc.date.issued2016
dc.identifier.issn0038-092X
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/2317
dc.description.abstractZnO spheroidal nanoparticles, synthesized by microwave processing, were used for preparation of composites with polyethylene oxide (PEO). The phase purity and crystal structure of the composites were investigated by X-ray diffraction (XRD) and Raman spectroscopy. The composites’ particles morphology and size distributions were studied by FE-SEM and laser diffraction particle size analyzer, respectively. The optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. It is found that in the wavelength range 550–800 nm, ZnO and ZnO/PEO composites absorb about 50% of the incident light intensity. Also red-shift of band gap energy (0.12–0.15 eV) compared to bulk ZnO was determined. The effect of PEO molecular weights, 200,000, 600,000 and 900,000 g/mol, on photocatalytic activity of ZnO/PEO composites were examined via de-colorization of methylene blue (MB) under direct sunlight irradiation. A large efficiency of MB de-colorization was found after 6 h of irradiation. The enhanced photocatalytic activity of ZnO/PEO composites is attributed to the: (1) lattice defects introduced in ZnO crystal structure by rapid microwave processing, and (2) presence of PEO as a source of oxygen interstitials. In order to confirm and further clarify the experimental results ab initio calculations based on density functional theory (DFT) were performed.en
dc.format127 (2016) 124-135
dc.languageen
dc.publisherElsevier
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45004/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45018/RS//
dc.rightsrestrictedAccess
dc.sourceSolar Energyen
dc.subjectzinc oxide
dc.subjectmicrowave processing
dc.subjectPEO
dc.subjectheterogeneous photocatalysis
dc.subjectsunlight irradiation
dc.subjectmethylene blue
dc.titleEffect of PEO molecular weight on sunlight induced photocatalytic activity of ZnO/PEO compositesen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractШкапин, Сречо Давор; Марковић, Смиља; Ускоковић, Драган; Рајић, Владимир; Станковић, Aна; Веселиновић, Љиљана; Белошевић Чавор, Јелена; Баталовић, Катарина; Aбазовић, Надица;
dc.citation.spage124
dc.citation.epage135
dc.citation.volume127
dc.identifier.doi10.1016/j.solener.2016.01.026
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/handle/123456789/2317/paper1317-2396.pdf


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