Preparation, microstructure and hydrogen sorption properties of nanoporous carbon aerogels under ambient drying
MetadataShow full item record
Organic aerogels are prepared by the sol–gel method from polymerization of resorcinol with furfural. These aerogels are further carbonized in nitrogen in order to obtain their corresponding carbon aerogels (CA); a sample which was carbonized at 900 °C was also activated in a carbon dioxide atmosphere at 900 °C. The chemical reaction mechanism and optimum synthesis conditions are investigated by means of Fourier transform infrared spectroscopy and thermoanalyses (thermogravimetric/differential thermal analyses) with a focus on the sol–gel process. The carbon aerogels were investigated with respect to their microstructures, using small angle x-ray scattering (SAXS), transmission electron microscopy (TEM) and nitrogen adsorption measurements at 77 K. SAXS studies showed that micropores with a radius of gyration of <0.35 ± 0.07 to 0.55 ± 0.05 nm were present, and TEM measurements and nitrogen adsorption showed that larger mesopores were also present. Hydrogen storage properties of the CA were also investigated. An activated sample with a Brunauer–Emmett–Teller surface area of 1539 ± 20 m2 g−1 displayed a reasonably high hydrogen uptake at 77 K with a maximum hydrogen sorption of 3.6 wt% at 2.5 MPa. These results suggest that CA are promising candidate hydrogen storage materials.
Showing items related by title, author, creator and subject.
Tian, Hu-Yong; Buckley, Craig; Paskevicius, Mark; Sheppard, Drew (2012)Hydrogen storage issues have been universally investigated in order to satisfy the goals for a hydrogen economy. Carbon aerogels are regarded as one of the most promising candidates for hydrogen storage at cryogenic ...
A synthesis method for cobalt doped carbon aerogels with high surface area and their hydrogen storage propertiesTian, Hu-Yong; Buckley, Craig; Sheppard, Drew; Paskevicius, Mark; Hanna, N. (2010)Carbon aerogels doped with nanoscaled Co particles were prepared by first coating activated carbon aerogels using a wet-thin layer coating process. The resulting metal-doped carbon aerogels had a higher surface area (1667 ...
Javadian, P.; Sheppard, Drew; Buckley, Craig; Jensen, T. (2015)In this study a eutectic melting composite of 0.62LiBH4-0.38NaBH4 has been infiltrated in two nanoporous resorcinol formaldehyde carbon aerogel scaffolds with similar pore sizes (37 and 38 nm) but different BET surface ...