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Studies on Pore Characteristics of Microporous Carbons Prepared with Different Types of Silica Templates
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  • Journal title : Carbon letters
  • Volume 8, Issue 1,  2007, pp.17-24
  • Publisher : Korean Carbon Society
  • DOI : 10.5714/CL.2007.8.1.017
 Title & Authors
Studies on Pore Characteristics of Microporous Carbons Prepared with Different Types of Silica Templates
Manocha, S.; Movaliya, Narendra;
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 Abstract
Microporous carbons with narrow pore size distribution have been successfully synthesized by using hydrolyzed and calcined silica as templates and phenol formaldehyde (pf) resin as carbon precursor. Phenol formaldehyde-silica micro composites were prepared by solution route. Subsesequently, silica templates were removed by HF leaching. Resulting carbons were steam activated. The porous carbons were characterized by nitrogen adsorption-desorption isotherm, SEM, FTIR analysis, iodine adsorption, thermogravimetry analysis, etc. Adsorption isotherms show that the porous carbon prepared from calcined silica as templates are microporous with 88% pores of size <2 nm porosity and are of type I isotherm, while porous carbon prepared by using hydrolyzed silica are microporous with 89% microporosity, shows hysteresis loop at high relative pressure indicating the presence of some mesoporosity in samples. The microporosity in porous carbon materials has a bearing on the nature of silica templates used for pore formation.
 Keywords
Microporous carbon;Template method;Silica template;Adsorption;SEM;
 Language
English
 Cited by
1.
Activated carbon-based gas sensors: effects of surface features on the sensing mechanism, J. Mater. Chem. A, 2015, 3, 7, 3821  crossref(new windwow)