European Journal of Chemistry

Carbon Aerogels: a study with different models of the effect resorcinol/catalyst at different ratios after pyrolysis and the effect on textural properties

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Published: Sep 30, 2017
DOI: https://doi.org/10.5155/eurjchem.8.3.279-287.1593
Keywords:
QSDFT, NLDFT, Aerogels, Surface chemistry, Adsorption properties, Microporous materials
Section
Research Article
Issue
Vol. 8 No. 3 (2017): September 2017
Dates
Received 2017-06-03
Accepted 2017-08-05
Published 2017-09-30


Main Article Content

Rafael Alberto Fonseca-Correa
Facultad de Ciencias, Departamento de Química, Grupo de Investigación en Sólidos Porosos y Calorimetría, Universidad de los Andes, Bogotá, 11001000, Colombia
Marlon Jose Bastidas-Barranco
Facultad de Ingeniería, Grupo DestaCar, Universidad de la Guajira, Guajira, 440001, Colombia
Liliana Giraldo
Facultad de Ciencias, Departamento de Química, Universidad Nacional de Colombia, Bogotá, 11001000, Colombia
Juan Carlos Moreno-Piraján
Facultad de Ciencias, Departamento de Química, Grupo de Investigación en Sólidos Porosos y Calorimetría, Universidad de los Andes, Bogotá, 11001000, Colombia

Abstract

Eight samples of carbon aerogels were prepared at various resorcinol/catalytic (R/C) ratios (ranging from 25 to 1500) and followed the changes in structure after pyrolysis. Isotherms of N2 to 77 K were determined to calculate the textural parameters using Dubinin-Astakhov (DA), Barret Joyner and Halenda (BJH), Non-Local Density Functional Theory (NLDFT) and Quenched Solid Density Functional Theory (QSDFT) models. The results generated two series of samples. In series I, a single type of pores developed (microporous, at low R/C weight ratio). Series II developed mesoporosity to top gears of R/C (> 400). The specific areas ranged from 64 to 990 m2/g. Additional models were applied to the materials synthesized, which allowed for adjustment to a system of “cylinder-slit” pores by applying the QSDFT kernel, with an error percentage ranging from 0.03 to 0.74.


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Fonseca-Correa, R. A.; Bastidas-Barranco, M. J.; Giraldo, L.; Moreno-Piraján, J. C. Carbon Aerogels: a Study With Different Models of the Effect Resorcinol Catalyst at Different Ratios After Pyrolysis and the Effect on Textural Properties. Eur. J. Chem. 2017, 8, 279-287.

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Supporting Agencies

Grant Basic Sciences by the University of the Andes through the Faculty of Science and the Vice-rectory of Research, and the Bank of the Republic of Colombia for their funding and the Convention 3580.
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