2024-03-28T18:15:51Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1852312022-12-21T14:10:56Zcom_10261_84com_10261_5col_10261_337
2019-07-01T12:40:24Z
urn:hdl:10261/185231
Multiphase graphitisation of carbon xerogels and its dependence on their pore size
Canal Rodríguez, María
Ramírez Montoya, Luis Adrián
Fernández Villanueva, Sara
Flores-López, Samantha L.
Menéndez Díaz, José Ángel
Arenillas de la Puente, Ana
Montes Morán, Miguel Ángel
Ministerio de Ciencia, Innovación y Universidades (España)
Agencia Estatal de Investigación (España)
Principado de Asturias
Arenillas de la Puente, Ana [0000-0002-5388-1169]
Menéndez Díaz, José Ángel [0000-0003-3117-3337]
Montes Morán, Miguel Ángel [0000-0002-8791-5582]
Ramírez Montoya, Luis Adrián [0000-0002-3595-9663]
Six carbon materials were obtained from the carbonisation of resorcinol/formaldehyde xerogels. All carbon xerogels (CXs) showed essentially the same microporosity but differed in their meso- or macroporosity, covering a wide interval of average meso- or macropore sizes from 10 nm to 3000 nm. The graphitisation of the CXs was heterogeneous, as detected by X-ray diffraction. The relative amount of the amorphous, turbostratic and graphitic carbon phases on the graphitised xerogels was different depending on the pore size of the CXs. Crystalline parameters such as interlayer spacings (d002) and crystallite sizes along the c-axis (Lc) were calculated from the different contributions and were also found to depend on the pore size of the parent CXs. Transmission electron microscopy and Raman spectroscopy analyses helped to identify nanostructures that could be assigned to the three carbon components of the graphitic xerogels. The occurrence of most of these nanostructures was compatible with a solid-phase transformation of the amorphous precursor. The electrical conductivity of the graphitised xerogels also depended on their original pore size, with values ranging from 2 S cm−1 for the materials with a 10 nm pore size to 18 S cm−1 for the materials with bigger pore sizes.
2019-07-01T12:40:24Z
2019-07-01T12:40:24Z
2019-06-14
artículo
Carbon 152: 704-714 (2019)
0008-6223
http://hdl.handle.net/10261/185231
10.1016/j.carbon.2019.06.057
http://dx.doi.org/10.13039/501100011033
http://dx.doi.org/10.13039/100011941
eng
Postprint
https://doi.org/10.1016/j.carbon.2019.06.057
Sí
info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/CTQ2017-87820-R
CTQ2017-87820-R/AEI/10.13039/501100011033
https://creativecommons.org/licenses/by-nc-nd/4.0/
openAccess
Elsevier