Synthesis of ZnO/TiO2 spherical particles for blue light screening by ultrasonic spray pyrolysis

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dc.contributor.authorRatanathavorn Wittawat
dc.contributor.authorRungruang Rittipun
dc.contributor.authorModsuwan Jarasfah
dc.contributor.authorBouhoad Nattaporn
dc.contributor.correspondenceR. Wittawat; Faculty of Science and Technology, Suan Dusit University, Bangkok, 228-228/1-3 Sirindhorn Alley, Bang Bumru, Bang Phlat, 10700, Thailand; email: wittawat_rat@dusit.ac.th
dc.date.accessioned2025-03-10T07:36:05Z
dc.date.available2025-03-10T07:36:05Z
dc.date.issued2020
dc.description.abstractA broad UVÐvis absorbance covering the blue visible region was obtained by ultrasonic spray pyrolysis of ZnO/TiO2 spherical particles at pyrolysis temperatures of 400 ¡C, 500 ¡C and 600 ¡C. Zinc nitrate hexahydrate and titanium isopropoxide were used as precursors prepared via mixed solution. The morphology characterization and elemental analysis of the synthesized ZnO/TiO2 spherical particles were carried out by a scanning electron microscope equipped with an energy dispersive X-ray spectrometer and by a transmission electron microscope. The crystal structures were characterized by X-ray diffraction (XRD). UVÐvis absorbance spectra were measured by an ultraviolet-visible-near infrared spectrometer. The synthesized particles were confirmed to be ZnO/TiO2 microspheres. The obtained ZnO structure was indicated by XRD analysis to be wurtzite, and two different TiO2 structures were observed; anatase and rutile. The crystal sizes were estimated from Scherrer's equation and ranged from 33.53 to 39.63 nm for the ZnO crystal, and from 5.78 to 59.2 nm for the two TiO2 crystals. The calculated energy band gap of the synthesized ZnO/TiO2 spherical particles ranged from 3.19 to 3.76 eV. Thus, doping of ZnO with TiO2 promoted visible light absorption, providing a broad UVÐvis absorbance that covers the blue light region more efficiently than commercial ZnO. © 2020 Elsevier Ltd
dc.identifier.citationMaterials Today Communications
dc.identifier.doi10.1016/j.mtcomm.2020.101126
dc.identifier.issn23524928
dc.identifier.scopus2-s2.0-85083287584
dc.identifier.urihttps://repository.dusit.ac.th//handle/123456789/4773
dc.languageEnglish
dc.publisherElsevier Ltd
dc.rights.holderScopus
dc.subjectBlue light absorbance
dc.subjectMicrospheres
dc.subjectUltrasonic spray pyrolysis
dc.subjectZnO/TiO<sub>2</sub>
dc.titleSynthesis of ZnO/TiO2 spherical particles for blue light screening by ultrasonic spray pyrolysis
dc.typeArticle
mods.location.urlhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85083287584&doi=10.1016%2fj.mtcomm.2020.101126&partnerID=40&md5=4188e2b9d2918b251ce717f60a85a691
oaire.citation.volume24
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