| Texto completo | |
| Autor(es): |
de Palma, Joao V. N.
;
Catto, Ariadne C.
;
Borges, Janaina L.
;
Bernardi, Maria I. B.
;
Guell, Frank
;
Gispert-Guirado, Francesc
;
Llobet, Eduard
;
Avansi, Waldir
;
Silva, Luis F. Da
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Alloys and Compounds; v. 1051, p. 10-pg., 2026-01-25. |
| Resumo | |
This manuscript investigates the effects of Mn addition on the microstructural, electronic, and surface properties of the WO3 compound synthesized via the modified polymeric precursor method. X-ray diffraction, Raman spectroscopy analyses indicated that Mn addition resulted in the formation of both monoclinic WO3 and MnWO4 phases. X-ray spectroscopies (XPS and XANES) revealed that the presence of a spurious phase did not alter the chemical environment of oxygen atoms. Regarding the light-assisted gas-sensing experiments, Mn addition improved the sensing performance of the compound towards sub-ppm NO2 levels, which was linked to the creation of additional adsorption sites resulting from the formation of the WO3/MnWO4 composite. These findings demonstrate that the WO3/MnWO4 composite is a promising material for application as NO2 gas sensors operating at room temperature. (AU) | |
| Processo FAPESP: | 22/02927-3 - Sensores de gases baseados em semicondutores do tipo-n operando a temperatura ambiente: investigação do desempenho e dos mecanismos envolvidos |
| Beneficiário: | Luís Fernando da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Projeto Inicial |
| 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 |