Designing micro- and mesoporous carbon networks by chemical activation of organic resins

Abstract

method was found highly dependent of the reagent and activation temperature, highlighting the possibility to design micro-mesoporous carbon xerogels at low temperatures with a subtle control of the activation conditions.

Carbon Black as Conductive Additive and Structural Director of Porous Carbon Gels

“…As seen, both samples displayed the characteristic broad D and G bands of carbon materials between 1000 and 2000 cm −1 , with the intensity of the G band (assigned to ordered graphitic domains) and the contributions of the bands in the second order range of the spectrum more pronounced for the CB. This is in agreement with the disordered structure of the matrix of the carbon gels [15,20,28], compared to the order domains in the carbon black. A better indication of the spatial arrangement and distribution of the CB within the carbon gel matrix can be observed in Figure 2 for sample CPG-CB16, showing a reconstructed image corresponding to the variation of the fitted I D /I G ratio in the scanned area.…”

Synthesis of mechanically robust porous carbon monoliths for CO2 adsorption and separation

“…Another route to synthesize monolithic carbon materials via carbonization of monolithic polymers which are synthesized through the polymerization like phenolic resin has attracted more attention. Gomis-Berenguer et al [9] synthesized carbon xerogels with ultrahigh micro-and mesopores from the activation of polymeric resins prepared by polycondensation of resorcinol/formaldehyde mixtures in basic medium and subcritical drying. Macías et al [10] prepared flexible monolithic carbon aerogels by incorporating diatomite as anti-shrinkage agent during the solgel polycondensation of resorcinol and formaldehyde.…”

Nanoporous Carbons with Tuned Porosity

“…Carbon gels with SSA of 1800-1900 m 2 /g and micropore volumes of 0.6-0.7 cm 3 /g, with no contributions of mesopores have been reported by activation using KOH at 800 ºC (Fig. 8) [130]. Furthermore, chemical activation using wetimpregnation techniques can avoid the destruction of the mesoporosity, while increasing the SSA and micropore volumes [130].…”