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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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal do Espírito Santo (UFES)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.creatorCapeli, R. A. [UNESP]-
Autor(es): dc.creatorDalmaschio, C. J.-
Autor(es): dc.creatorTeixeira, S. R. [UNESP]-
Autor(es): dc.creatorMastelaro, V. R.-
Autor(es): dc.creatorChiquito, A. J.-
Autor(es): dc.creatorLongo, E.-
Autor(es): dc.creatorPontes, F. M. [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:24:51Z-
Data de disponibilização: dc.date.available2022-02-22T00:24:51Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2019-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1039/c9ra10173j-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/198536-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/198536-
Descrição: dc.descriptionHierarchical 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.-
Descrição: dc.descriptionDepartment of Chemistry Universidade Estadual Paulista-Unesp, P. O. Box 473-
Descrição: dc.descriptionDepartment of Chemistry Universidade Federal Do Espírito Santo-UFES-
Descrição: dc.descriptionDepartament of Physics Faculdade de Ciências e Tecnologia-FCT Universidade Estadual Paulista, Rua Roberto Simonsen, 305-
Descrição: dc.descriptionPhysics Institute of São Carlos (IFSC) University of São-
Descrição: dc.descriptionNanO LaB-Department of Physics Universidade Federal de São Carlos, Via Washington Luiz km 235, P. O. Box 676-
Descrição: dc.descriptionLIEC-CDMF-Department of Chemistry Universidade Federal de São Carlos, Via Washington Luiz, km 235, P. O. Box 676-
Descrição: dc.descriptionDepartment of Chemistry Universidade Estadual Paulista-Unesp, P. O. Box 473-
Descrição: dc.descriptionDepartament of Physics Faculdade de Ciências e Tecnologia-FCT Universidade Estadual Paulista, Rua Roberto Simonsen, 305-
Formato: dc.format6625-6639-
Idioma: dc.languageen-
Relação: dc.relationRSC Advances-
???dc.source???: dc.sourceScopus-
Título: dc.titleOne-step controllable synthesis of three-dimensional WO3 hierarchical architectures with different morphologies decorated with silver nanoparticles: Enhancing the photocatalytic activity-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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