Influence of microwave-assisted hydrothermal treatment time on the crystallinity, morphology and optical properties of ZnWO4 nanoparticles: Photocatalytic activity

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dc.contributor.authorAndrade Neto, Nivaldo Ferreira da
dc.contributor.authorNunes, T. B. O.
dc.contributor.authorLi, Máximo Siu
dc.contributor.authorSilva, Elson Longo da
dc.contributor.authorDelmonte, Maurício Roberto Bomio
dc.contributor.authorMotta, Fabiana Villela da
dc.date.accessioned2021-09-23T14:12:39Z
dc.date.available2021-09-23T14:12:39Z
dc.date.issued2020-02-01
dc.description.resumoIn this work, zinc tungstate (ZnWO4) nanoparticles were obtained by microwave-assisted hydrothermal method at 140 °C and 2 atm. The hydrothermal treatment time was varied at 0, 5, 10, 30, 60 and 120 min. The nano- particles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scan- ning electron microscopy (SEM), transmission electron microscope (TEM), high-resolution transmission electron microscope (HRTEM), X-ray fluorescence (FRX), nitrogen adsorption by Brunauer-Emmett-Teller method (BET), UV–Visible spectroscopy (UV–Vis) and Photoluminescence (PL) properties. The adsorptive and photocatalytic properties were estimated against methylene blue (MB - cationic) and methyl orange (MO - anionic) dyes. The diffractograms show that the larger hydrothermal treatment time, anhigher the powders crystallinity. The BET and SEM analysis indicate that the increase in hydrothermal time does not interfere significantly in nanoparticles size but reduces their porosity. The change in the surface area is consistent with the adsorption tests, where the increase of the hydrothermal treatment time reduces the adsorption against the MB and MO dyes. However, increasing the hydrothermal treatment time provides an increase in photocatalytic activitypt_BR
dc.identifier.citationANDRADE NETO, N.F.; NUNES, T.B.O.; LI, M.; LONGO, E.; BOMIO, M.R.D.; MOTTA, F.V.. Influence of microwave-assisted hydrothermal treatment time on the crystallinity, morphology and optical properties of ZnWO4 nanoparticles: photocatalytic activity. Ceramics International, [S.L.], v. 46, n. 2, p. 1766-1774, fev. 2020. Disponível em: https://www.sciencedirect.com/science/article/pii/S0272884219326823. Acesso em: 16 abr. 2021. http://dx.doi.org/10.1016/j.ceramint.2019.09.151.pt_BR
dc.identifier.doi10.1016/j.ceramint.2019.09.151
dc.identifier.issn0272-8842
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/37981
dc.languageenpt_BR
dc.publisherElsevierpt_BR
dc.subjectMicrowave-assisted hydrothermal methodpt_BR
dc.subjectZnWO4 nanoparticlespt_BR
dc.subjectPhotocatalytic propertiespt_BR
dc.subjectAnionic and cationic dyespt_BR
dc.titleInfluence of microwave-assisted hydrothermal treatment time on the crystallinity, morphology and optical properties of ZnWO4 nanoparticles: Photocatalytic activitypt_BR
dc.typearticlept_BR

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