One-step controllable synthesis of three-dimensional WO3 hierarchical architectures with different morphologies decorated with silver nanoparticles: Enhancing the photocatalytic activity

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dc.contributor.authorCapeli, R. A. [UNESP]
dc.contributor.authorDalmaschio, C. J.
dc.contributor.authorTeixeira, S. R. [UNESP]
dc.contributor.authorMastelaro, V. R.
dc.contributor.authorChiquito, A. J.
dc.contributor.authorLongo, E.
dc.contributor.authorPontes, F. M. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal do Espírito Santo (UFES)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.date.accessioned2020-12-12T01:15:33Z
dc.date.available2020-12-12T01:15:33Z
dc.date.issued2020-01-01
dc.description.abstractHierarchical architecture self-assembled three-dimensional WO3 and WO3·Ag with high uniformity have been successfully obtained using peroxopolytungstic acid as precursor and silver in a morphological engineering approach under moderate hydrothermal conditions. The as-grown samples were characterized by XRD, FEG-SEM, HRTEM, TGA, Raman, FTIR, UV-Vis, and XPS. In addition, the photocatalytic performance of the hierarchical architecture self-assembled three-dimensional WO3 and WO3·Ag has also been investigated through degradation of Rhodamine B (RhB) dye under 467 nm LED light irradiation. Results show that the hierarchical architecture self-assembled three-dimensional shapes evolve (depending on the silver amount) from 3D irregular-platelet-like building blocks to 3D hexagonal building blocks then to three-dimensional hexagonal-football-like and finally to 3D multi-branched spiky ball-like microcrystals. Also, high-magnification FEG-SEM and HRTEM images showed that the Ag nanoparticles with diameter about 5-15 nm were anchored on the surface of the 3D hierarchical architecture. UV-Vis measurements demonstrated that the 3D hierarchical structures gradually absorbed more light when the Ag content was increased. Moreover, the band-gap energy to WO3·0.20Ag was from Eg = 2.48 eV. It was found that 3D multi-branched spiky ball-like WO3·0.20Ag (corresponding to 1.2748 g of the AgNO3) microcrystals show outstanding photocatalytic activity in the photodegradation of RhB dye compared with other 3D hierarchical architectures.en
dc.description.affiliationDepartment of Chemistry Universidade Estadual Paulista-Unesp, P. O. Box 473
dc.description.affiliationDepartment of Chemistry Universidade Federal Do Espírito Santo-UFES
dc.description.affiliationDepartament of Physics Faculdade de Ciências e Tecnologia-FCT Universidade Estadual Paulista, Rua Roberto Simonsen, 305
dc.description.affiliationPhysics Institute of São Carlos (IFSC) University of São
dc.description.affiliationNanO LaB-Department of Physics Universidade Federal de São Carlos, Via Washington Luiz km 235, P. O. Box 676
dc.description.affiliationLIEC-CDMF-Department of Chemistry Universidade Federal de São Carlos, Via Washington Luiz, km 235, P. O. Box 676
dc.description.affiliationUnespDepartment of Chemistry Universidade Estadual Paulista-Unesp, P. O. Box 473
dc.description.affiliationUnespDepartament of Physics Faculdade de Ciências e Tecnologia-FCT Universidade Estadual Paulista, Rua Roberto Simonsen, 305
dc.format.extent6625-6639
dc.identifierhttp://dx.doi.org/10.1039/c9ra10173j
dc.identifier.citationRSC Advances, v. 10, n. 11, p. 6625-6639, 2020.
dc.identifier.doi10.1039/c9ra10173j
dc.identifier.issn2046-2069
dc.identifier.scopus2-s2.0-85079571999
dc.identifier.urihttp://hdl.handle.net/11449/198536
dc.language.isoeng
dc.relation.ispartofRSC Advances
dc.sourceScopus
dc.titleOne-step controllable synthesis of three-dimensional WO3 hierarchical architectures with different morphologies decorated with silver nanoparticles: Enhancing the photocatalytic activityen
dc.typeArtigo

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