| Texto completo | |
| Autor(es): |
Costa, Tainara L. G.
;
Vieira, Mariana A.
;
Goncalves, Gustavo R.
;
Cipriano, Daniel F.
;
Lacerda, Valdemar
;
Goncalves, Arlan S.
;
Scopel, Wanderla L.
;
de Siervo, Abner
;
Freitas, Jair C. C.
Número total de Autores: 9
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Physical Chemistry Chemical Physics; v. N/A, p. 17-pg., 2023-02-14. |
| Resumo | |
Phosphorus-containing graphene-based hybrids are materials with outstanding properties for diverse applications. In this work, an easy route to produce phosphorus-graphene oxide hybrid materials is described, involving the use of variable amounts of H3PO4 and H2SO4 during the reaction of oxidation of a graphitic precursor. The physical and chemical features of the hybrids change significantly with the variation in the acid amounts used in the syntheses. XPS and solid-state C-13 and P-31 NMR results show that the hybrids contain large amounts of oxygen functional groups, with the phosphorus incorporation proceeding mostly through the formation of phosphate-like linkages and other functions with C-O-P bonds. The experimental findings are supported by DFT calculations, which allow the assessment of the energetics and the geometry of the interaction between phosphate groups and graphene-based models; these calculations are also used to predict the chemical shifts in the P-31 and C-13 NMR spectra of the models, which show good agreement with the experimentally observed solid-state NMR spectra. (AU) | |
| Processo FAPESP: | 07/08244-5 - Estudo das propriedades magnéticas de filmes ultrafinos e nanopartículas de Pd e PdAu via XMCD |
| Beneficiário: | Abner de Siervo |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 07/54829-5 - Estrutura eletrônica e geométrica de nano materiais: um estudo por radiação sincroton |
| Beneficiário: | Richard Landers |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |