| Texto completo | |
| Autor(es): |
Vicente, Marcos R. S.
;
Xavier, Gabriela T. M.
;
Carvalho, Wagner A.
;
De Carvalho, Jose M.
;
Souza, Juliana S.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Applied Surface Science; v. 664, p. 9-pg., 2024-05-17. |
| Resumo | |
Green hydrogen is a very attractive energy source, a widely studied strategy among scientists to produce it is using metal oxide semiconductors as photoanodes for photoelectrochemical water splitting. The main challenge is to produce a photocatalyst that is stable and efficient enough to be commercially viable. In this sense, several different combinations of materials have been studied. Here, we report the preparation of g-C3N4/NaNbO3 3 N 4 /NaNbO 3 coupled to Pt-based species (Pt-g-C3N4/NaNbO3) 3 N 4 /NaNbO 3 ) and its potential application as a photoanode for water photosplitting. NaNbO3 3 was chosen for its suitable properties, g-C3N4 3 N 4 was used to enhance the visible light activity, and Pt species were added to perform as a co-catalyst avoiding recombination of photogenerated charges. The main innovations are the reduced time and energy-consuming procedure to prepare NaNbO3 3 and the direct polymerization of the g-C3N4 3 N 4 on the NaNbO3. 3 . Results demonstrate the successful synthesis of the Pt-g-C3N4/ 3 N 4 / NaNbO3 3 heterojunction; however, the resultant system showed low efficiency, probably for forming a layer of gC3N4 3 N 4 on the top of NaNbO3 3 and electrically active surface states at the semiconductor/solution interfaces. Besides that, this study contributes valuable insights into the design of photoelectrodes for sustainable hydrogen production, especially due to the detailed research on the formation of the heterojunction. (AU) | |
| Processo FAPESP: | 21/05958-4 - Modulação de propriedades físico-químicas de semicondutores metálicos através do controle dos parâmetros de síntese assistida por micro-ondas |
| Beneficiário: | Juliana dos Santos de Souza Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 21/12342-0 - Produção de carvões bifuncionais para a conversão catalítica de polióis e terpenos |
| Beneficiário: | Wagner Alves Carvalho |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |