Critical temperatures in the synthesis of graphene-like materials by thermal exfoliation-reduction of graphite oxide
Por favor, use este identificador para citar o enlazar este ítem:
http://hdl.handle.net/10045/36069
Título: | Critical temperatures in the synthesis of graphene-like materials by thermal exfoliation-reduction of graphite oxide |
---|---|
Autor/es: | Botas Velasco, Cristina | Álvarez Rodríguez, Patricia | Blanco Rodríguez, Clara | Santamaría Ramírez, Ricardo | Granda Ferreira, Marcos | Gutiérrez Álvarez, María Dolores | Rodríguez Reinoso, Francisco | Menéndez López, Rosa María |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica |
Palabras clave: | Graphene | Graphite oxide | Graphene materials | Thermal exfoliation |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | feb-2013 |
Editor: | Elsevier |
Cita bibliográfica: | Carbon. 2013, 52: 476-485.doi:10.1016/j.carbon.2012.09.059 |
Resumen: | We prepared a series of graphene-like materials by thermal exfoliation/reduction of a graphite oxide (GO) at temperatures between 127 °C and 2400 °C. The extent of the exfoliation and reduction of the GO at different temperatures, as well as the impact on the resultant graphene-like materials (TRGs), were studied through their chemical/structural characterization. The main oxygen loss was observed at 127 °C during the blasting of the GO, which produced its exfoliation into monolayer functionalized TRG with hydroxyl groups and minor amounts of epoxy and carboxyl groups. Above 600 °C, the reduction continued smoothly, with oxygen and hydrogen loss and the conversion of hybridised carbon atoms from sp3 into sp2. 1000 °C appears to be a critical temperature for the efficiency of the reduction process, as the resulting TRG contained <2% oxygen and 81.5% sp2-carbon atoms. The materials obtained at 2000 °C and 2400 °C were almost oxygen-free and the layers exhibited a dramatic restoration of the pristine graphite structure, as confirmed by the increase in the average size of the sp2-domains. The typical disordered stacking of TRGs increases with temperature, although they can be dispersed yielding monolayers at 127 and 300 °C and stacks of up to 4–6 layers above 1000 °C, as determined by AFM. |
Patrocinador/es: | The authors thank the Spanish Science and Innovation Ministry (CONSOLIDER INGENIO 2010 CSD2009-00050, MAT2010-16194) for their financial support. Dr. Patricia Alvarez thanks the Spanish Science and Innovation Ministry for her Ramon y Cajal contract. Cristina Botas acknowledges a fellowship from FICYT. |
URI: | http://hdl.handle.net/10045/36069 |
ISSN: | 0008-6223 (Print) | 1873-3891 (Online) |
DOI: | 10.1016/j.carbon.2012.09.059 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Revisión científica: | si |
Versión del editor: | http://dx.doi.org/10.1016/j.carbon.2012.09.059 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
---|---|---|---|---|
2013_Botas_etal_Carbon.pdf | Preprint (acceso abierto) | 1,47 MB | Adobe PDF | Abrir Vista previa |
2013_Botas_etal_Carbon-final.pdf | Versión final (acceso restringido) | 2,02 MB | Adobe PDF | Abrir Solicitar una copia |
Todos los documentos en RUA están protegidos por derechos de autor. Algunos derechos reservados.