Characterization and adsorption modeling of silicon carbide-derived carbons

Langmuir : the ACS Journal of Surfaces and Colloids
T X NguyenS K Bhatia

Abstract

We present characterization results of silicon carbide-derived carbons (Si-CDCs) prepared from both nano- and micron-sized betaSiC particles by oxidation in pure chlorine atmosphere at various synthesis temperatures (600-1000 degrees C). Subsequently, the adsorption modeling study of simple gases (CH4 and CO2) in these Si-CDC samples for a wide range of pressures and temperatures using our Finite Wall Thickness model [Nguyen, T. X.; Bhatia, S. K. Langmuir 2004, 20, 3532] was also carried out. In general, characterization results showed that the core of Si-CDC particles contains predominantly amorphous material while minor graphitization was also observed on the surface of these particles for all the investigated synthesis temperatures (600-1000 degrees C). Furthermore, postsynthetic heat treatment at 1000 degrees C for 3 days, as well as particle size of precursor (betaSiC) were shown to have slight impact on the graphitization. In spite of the highly disordered nature of Si-CDC samples, the adsorption modeling results revealed that the Finite Wall Thickness model provides reasonably good prediction of experimental adsorption data of CO2 and CH4 in all the investigated Si-CDC samples at the temperatures of 273 K, 313 K, and 333...Continue Reading

References

Apr 1, 1985·Physical Review A: General Physics·P Tarazona
Nov 1, 1985·Physical Review A: General Physics·P Tarazona
Aug 9, 2003·Nature Materials·Yury GogotsiMichel W Barsoum
Oct 20, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·S K BhatiaD Nicholson
Mar 23, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Thanh X NguyenDavid Nicholson
May 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Thanh X Nguyen, Suresh K Bhatia
Nov 17, 2005·Journal of the American Chemical Society·Yury GogotsiJohn E Fischer
Nov 30, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Thanh X Nguyen, Suresh K Bhatia
Jul 2, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·Thanh X NguyenSuresh K Bhatia

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Citations

Jul 14, 2011·Physical Chemistry Chemical Physics : PCCP·Suresh K BhatiaDavid Nicholson
Jun 17, 2014·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·Amir H FarmahiniSuresh K Bhatia

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