| Texto completo | |
| Autor(es): Mostrar menos - |
Penha, M. D.
;
Gouveia, A. F.
;
Teixeira, M. M.
;
de Oliveira, R. C.
;
Assis, M.
;
Sambrano, J. R.
;
Yokaichya, F.
;
Santos, C. C.
;
Goncalves, R. F.
;
Li, M. Siu
;
San-Miguel, M. A.
;
Andres, J.
;
Longo, E.
Número total de Autores: 13
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Materials Research Bulletin; v. 132, p. 11-pg., 2020-12-01. |
| Resumo | |
This article describes the synthesis of alpha-Ag2W0.75Mo0.25O4 using a coprecipitation method followed by microwave irradiation for different times. The samples were characterized using X-ray and neutron diffractions with Rietveld refinement, Raman spectroscopy, X-ray fluorescence, and ultraviolet-visible diffused reflectance spectroscopy, as well as by photoluminescence emissions. To complement and rationalize the experimental results, first-principles calculations were performed. The formation and growth of metallic Ag nanoparticles on the surfaces of alpha-Ag2W0.75Mo0.25O4 were studied by transmission electron microscopy and energy dispersive X-ray spectroscopy. Results show that alpha-Ag2WO4/beta-Ag2MoO4 samples obtained correspond to alpha-Ag2W0.75Mo0.25O4 heterostructure, and the posterior microwave irradiation favors the process of substituting W by Mo, with subsequent formation of a solid solution. Photocatalytic tests were performed to verify the photocatalytic efficiency against the Rhodamine B. Photoluminescence emissions and photocatalytic results showed that the samples obtained at the longest microwave irradiation time promoted the formation of structural defects and enhanced the material properties. (AU) | |
| Processo FAPESP: | 16/23891-6 - Modelagem computacional da matéria condensada |
| Beneficiário: | Alex Antonelli |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 19/08928-9 - Modelagem e Simulações da Funcionalização de Nanotubos Porosos Inorgânicos |
| Beneficiário: | Julio Ricardo Sambrano |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 19/01732-1 - Atividade fotocatalítica de semicondutores multifuncionais: influência da morfologia e injeção de elétrons |
| Beneficiário: | Amanda Fernandes Gouveia |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |