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dc.creatorMarković, Smilja
dc.creatorStanković, Ana
dc.creatorDostanić, Jasmina
dc.creatorMančić, Lidija
dc.creatorŠkapin, Srečo Davor
dc.creatorUskoković, Dragan
dc.date.accessioned2017-12-11T15:39:38Z
dc.date.available2017-12-11T15:39:38Z
dc.date.issued2017
dc.identifier.isbn9788691911126
dc.identifier.urihttp://dais.sanu.ac.rs/123456789/15440
dc.description.abstractOver the past four decades there is an increasing interest to develop highly efficient semiconductor photocatalysts for degradation of organic and biological pollutants in water under light irradiation. The semiconductor band gap determines which wavelength of light will be absorbed; precisely, semiconductors with a wide band gap (> 3 eV) can absorb only UV light, while those with a narrow band gap (< 3 eV) can be activated by visible light. In this study we examined structural, morphological, textural and optical properties of ZnO/SnO2 composite as potential photocatalyst. Mechanical activation of commercial ZnO and SnO2 powders has been used to produce a composite with high density of surface defects. To investigate the influence of thermal treatment on the physical properties, and consequently on photoactivity, the composite has been traditionally annealed at 400 and 700 °C. The phase purity, crystal structure and average crystallite size of pristine metal oxides and the composites were investigated by X-ray diffraction and Raman spectroscopy. The particles morphology and size distributions were studied by FE–SEM and laser diffraction particle size analyzer, respectively. The textural properties were determined from N¬2¬ adsorption/desorption experiments, while the optical properties were studied using UV–Vis diffuse reflectance and photoluminescence spectroscopy. Photocatalytic activity of pristine ZnO and ZnO/SnO2 composites were examined via de-colorization of methylene blue under: (1) direct natural sunlight, and (2) artificial UV irradiation. In both cases enhanced photocatalytic activity of ZnO/SnO2 has been found. Enhanced photocatalytic activity can be attributed to the surface defects and to created ZnO/SnO2 heterojunctions which reduced electron-hole recombination time.eng
dc.format(2017) 49-49
dc.formatapplication/pdf
dc.languageen
dc.publisherBelgrade : Materials Research Society of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/45004/RS//
dc.rightsopenAccess
dc.sourceProgramme and The Book of Abstracts / Nineteenth Annual Conference YUCOMAT 2017, Herceg Novi, September 4-8, 2017eng
dc.subjectphotocatalysts
dc.titleEnhanced natural sunlight- and artificial UV-driven photocatalytic activity of mechanically activated ZnO/SnO2 compositeeng
dc.typeconferenceObject
dc.rights.licenseBY-NC-ND
dcterms.abstractМарковић, Смиља; Станковић, Aна; Достанић, Јасмина; Шкапин, Сречо Давор; Ускоковић, Драган; Манчић, Лидија;
dc.citation.spage49
dc.citation.epage49
dc.type.versionpublishedVersion
dc.identifier.fulltexthttp://dais.sanu.ac.rs/bitstream/id/20029/1798.pdf


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