Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.matchemphys.2019.05.024 http://hdl.handle.net/11449/189161 |
Resumo: | ZrO2@SiO2 core-shell nanostructures were synthesized by a facile two-step hydrothermal plus Stöber chemical route. The structure, morphology and properties of the nanoparticles were characterized using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectroscopy, zeta-potential measurements, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). XRD confirmed the presence of tetragonal ZrO2 crystalline and amorphous SiO2 phases. FTIR analysis confirmed the existence of Zr-O-Si bonds at the surface of the core-shell nanostructures. According to the UV–Vis spectroscopy measurements, the energy band gap value of the uncoated ZrO2 nanoparticles was estimated to be 5.13 eV and the excitation energy (energy band discontinuity) of the ZrO2@SiO2 core-shell nanostructures was found to be 2.31 eV. Transmission electronic microscopy results showed 5–8 nm ZrO2 nanoparticles highly crystalline and fully covered by amorphous and uniform SiO2 layer 10–15 nm wide, which is an evidence of the core-shell structure. Photocatalytic performance of ZrO2@SiO2 core-shell nanostructures was carried out using rhodamine B dye in aqueous solution at room temperature under UV light irradiation. ZrO2@SiO2 core-shell nanostructures showed better photocatalytic activities in comparison to the as prepared ZrO2 and SiO2 samples. The enhanced photocatalytic performance for ZrO2@SiO2 core-shell nanostructures may be the result of the Zr-O-Si interfacial layer narrowing the energy gap needed to electron-hole pairs creation, thus enhancing photoinduced charges generation and reducing charges recombination. |
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Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solutionHydrothermalPhotocatalysisRhodamine BZrO2@SiO2 nanostructureZrO2@SiO2 core-shell nanostructures were synthesized by a facile two-step hydrothermal plus Stöber chemical route. The structure, morphology and properties of the nanoparticles were characterized using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectroscopy, zeta-potential measurements, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). XRD confirmed the presence of tetragonal ZrO2 crystalline and amorphous SiO2 phases. FTIR analysis confirmed the existence of Zr-O-Si bonds at the surface of the core-shell nanostructures. According to the UV–Vis spectroscopy measurements, the energy band gap value of the uncoated ZrO2 nanoparticles was estimated to be 5.13 eV and the excitation energy (energy band discontinuity) of the ZrO2@SiO2 core-shell nanostructures was found to be 2.31 eV. Transmission electronic microscopy results showed 5–8 nm ZrO2 nanoparticles highly crystalline and fully covered by amorphous and uniform SiO2 layer 10–15 nm wide, which is an evidence of the core-shell structure. Photocatalytic performance of ZrO2@SiO2 core-shell nanostructures was carried out using rhodamine B dye in aqueous solution at room temperature under UV light irradiation. ZrO2@SiO2 core-shell nanostructures showed better photocatalytic activities in comparison to the as prepared ZrO2 and SiO2 samples. The enhanced photocatalytic performance for ZrO2@SiO2 core-shell nanostructures may be the result of the Zr-O-Si interfacial layer narrowing the energy gap needed to electron-hole pairs creation, thus enhancing photoinduced charges generation and reducing charges recombination.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)LDMFN – Department of Chemistry Universidade Estadual Paulista - Unesp, P.O. Box 473, BauruLIEC – CDMF – Department of Chemistry Universidade Federal de São Carlos, Via Washington Luiz, Km 235, P.O. Box 676, São CarlosDepartment of Natural Science Universidade Federal do Espírito Santo - UFES, São MateusNanO LaB – Department of Physics Universidade Federal de São Carlos, Via Washington Luiz, Km 235, P.O. Box 676, São CarlosLDMFN – Department of Chemistry Universidade Estadual Paulista - Unesp, P.O. Box 473, BauruCNPq: 470147/2012-1Universidade Estadual Paulista (Unesp)Universidade Federal de São Carlos (UFSCar)Universidade Federal do Espírito Santo (UFES)Padovini, D. S.S. [UNESP]Magdalena, A. G. [UNESP]Capeli, R. G. [UNESP]Longo, E.Dalmaschio, C. J.Chiquito, A. J.Pontes, F. M. [UNESP]2019-10-06T16:31:41Z2019-10-06T16:31:41Z2019-05-15info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-8http://dx.doi.org/10.1016/j.matchemphys.2019.05.024Materials Chemistry and Physics, v. 233, p. 1-8.0254-0584http://hdl.handle.net/11449/18916110.1016/j.matchemphys.2019.05.0242-s2.0-85066104186Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengMaterials Chemistry and Physicsinfo:eu-repo/semantics/openAccess2024-04-29T18:16:49Zoai:repositorio.unesp.br:11449/189161Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:01:34.810802Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
title |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
spellingShingle |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution Padovini, D. S.S. [UNESP] Hydrothermal Photocatalysis Rhodamine B ZrO2@SiO2 nanostructure |
title_short |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
title_full |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
title_fullStr |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
title_full_unstemmed |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
title_sort |
Synthesis and characterization of ZrO2@SiO2 core-shell nanostructure as nanocatalyst: Application for environmental remediation of rhodamine B dye aqueous solution |
author |
Padovini, D. S.S. [UNESP] |
author_facet |
Padovini, D. S.S. [UNESP] Magdalena, A. G. [UNESP] Capeli, R. G. [UNESP] Longo, E. Dalmaschio, C. J. Chiquito, A. J. Pontes, F. M. [UNESP] |
author_role |
author |
author2 |
Magdalena, A. G. [UNESP] Capeli, R. G. [UNESP] Longo, E. Dalmaschio, C. J. Chiquito, A. J. Pontes, F. M. [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de São Carlos (UFSCar) Universidade Federal do Espírito Santo (UFES) |
dc.contributor.author.fl_str_mv |
Padovini, D. S.S. [UNESP] Magdalena, A. G. [UNESP] Capeli, R. G. [UNESP] Longo, E. Dalmaschio, C. J. Chiquito, A. J. Pontes, F. M. [UNESP] |
dc.subject.por.fl_str_mv |
Hydrothermal Photocatalysis Rhodamine B ZrO2@SiO2 nanostructure |
topic |
Hydrothermal Photocatalysis Rhodamine B ZrO2@SiO2 nanostructure |
description |
ZrO2@SiO2 core-shell nanostructures were synthesized by a facile two-step hydrothermal plus Stöber chemical route. The structure, morphology and properties of the nanoparticles were characterized using X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Vis spectroscopy, zeta-potential measurements, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). XRD confirmed the presence of tetragonal ZrO2 crystalline and amorphous SiO2 phases. FTIR analysis confirmed the existence of Zr-O-Si bonds at the surface of the core-shell nanostructures. According to the UV–Vis spectroscopy measurements, the energy band gap value of the uncoated ZrO2 nanoparticles was estimated to be 5.13 eV and the excitation energy (energy band discontinuity) of the ZrO2@SiO2 core-shell nanostructures was found to be 2.31 eV. Transmission electronic microscopy results showed 5–8 nm ZrO2 nanoparticles highly crystalline and fully covered by amorphous and uniform SiO2 layer 10–15 nm wide, which is an evidence of the core-shell structure. Photocatalytic performance of ZrO2@SiO2 core-shell nanostructures was carried out using rhodamine B dye in aqueous solution at room temperature under UV light irradiation. ZrO2@SiO2 core-shell nanostructures showed better photocatalytic activities in comparison to the as prepared ZrO2 and SiO2 samples. The enhanced photocatalytic performance for ZrO2@SiO2 core-shell nanostructures may be the result of the Zr-O-Si interfacial layer narrowing the energy gap needed to electron-hole pairs creation, thus enhancing photoinduced charges generation and reducing charges recombination. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-06T16:31:41Z 2019-10-06T16:31:41Z 2019-05-15 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.matchemphys.2019.05.024 Materials Chemistry and Physics, v. 233, p. 1-8. 0254-0584 http://hdl.handle.net/11449/189161 10.1016/j.matchemphys.2019.05.024 2-s2.0-85066104186 |
url |
http://dx.doi.org/10.1016/j.matchemphys.2019.05.024 http://hdl.handle.net/11449/189161 |
identifier_str_mv |
Materials Chemistry and Physics, v. 233, p. 1-8. 0254-0584 10.1016/j.matchemphys.2019.05.024 2-s2.0-85066104186 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Materials Chemistry and Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-8 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1808128595074220032 |