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Título: | Graphene materials with different structures prepared from the same graphite by the Hummers and Brodie methods |
Autor: | Botas Velasco, Cristina CSIC ORCID; Álvarez Rodríguez, Patricia CSIC ORCID ; Blanco Velasco, Patricia CSIC ; Granda Ferreira, Marcos CSIC ORCID ; Blanco Rodríguez, Clara CSIC ORCID ; Santamaría Ramírez, Ricardo CSIC ORCID ; Romasanta, Laura J. CSIC; Verdejo, Raquel CSIC ORCID ; López-Manchado, Miguel A. CSIC ORCID; Menéndez López, Rosa María CSIC | Palabras clave: | Graphene Graphite oxide Hummers and Brodie Oxidation methods |
Fecha de publicación: | dic-2013 | Editor: | Elsevier | Citación: | Carbon 65: 156–164 (2013) | Resumen: | [EN] Graphene materials containing different functional groups were prepared from a natural graphite, by means of two different oxidation methods (Hummers and Brodie). It was observed that the differences in the structure of the resultant graphite oxides (GOs) greatly affect the structure of the graphenes resulting from their thermal exfoliation/reduction. Although the oxidation of the graphite was more effective with the modified Hummers method than with Brodie’s method (C/O of 1.8 vs 2.9, as determined by XPS), the former generated a lower residual oxygen content after thermal exfoliation/reduction and a better reconstruction of the 2D graphene structure (with fewer defects). This is explained by the presence of conjugated epoxy and hydroxyl groups in the GO obtained by Brodie’s method, which upon thermal treatment, lead to the incorporation of oxygen into the carbon lattice preventing its complete restoration. Additionally, graphene materials obtained with Brodie’s method exhibit, in general, smaller sheet size and larger surface area. | Versión del editor: | http://dx.doi.org/10.1016/j.carbon.2013.08.009 | URI: | http://hdl.handle.net/10261/89244 | DOI: | 10.1016/j.carbon.2013.08.009 | ISSN: | 0008-6223 |
Aparece en las colecciones: | (INCAR) Artículos |
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