Polyhedral carbon nanofoams with minimum surface area partitions produced using silica nanofoams as templates
2010 (English)In: Carbon, ISSN 0008-6223, E-ISSN 1873-3891, Vol. 48, no 11, 3121-3130 p.Article in journal (Refereed) Published
Polyhedral silica nanofoam (PNF-SiO2) analogues of dry soap froths with minimal surface area were used as templates for making polyhedral carbon nanofoams (PNF-C). Furfuryl alcohol or triblock copolymers were used as carbon sources. The volume of carbon precursor relative to the internal pore volume of PNF-SiO2's was systematically varied between 50% and 100% in order to investigate the effect of filling fraction on internal structure of the corresponding PNF-C's. Transmission electron microscopy, small-angle X-ray scattering and nitrogen physisorption were used to characterize the samples. To aid the interpretation of the experimental data, a model for X-ray scattering from spherical shells was used to approximate scattering from the polyhedral foam cells. PNF-C's cast from the PNF-SiO2's, displayed the characteristic Plateau borders of minimal surface area foams defining interconnected, slit-like pore systems at all filling fractions. At relatively high filling fractions, inverse foam structures were obtained with the slit-like pores systems interpenetrating aggregated, close-packed, relatively low density polyhedral carbon nanoparticles co-joined by carbon struts. At relatively low filling fractions, polyhedral carbon nanofoams with relatively thin, fused double-wall structures and interconnected polyhedral pore systems were obtained.
Place, publisher, year, edition, pages
2010. Vol. 48, no 11, 3121-3130 p.
MOLECULAR-SIEVES, ELECTRON CRYSTALLOGRAPHY, MESOPOROUS SILICA, ADSORPTION
IdentifiersURN: urn:nbn:se:kth:diva-27154DOI: 10.1016/j.carbon.2010.04.049ISI: 000279984600013ScopusID: 2-s2.0-79955011698OAI: oai:DiVA.org:kth-27154DiVA: diva2:375072
FunderSwedish Research Council
QC 201012072010-12-072010-12-072011-02-03Bibliographically approved