Effects of carbonization conditions on the microporous structure and high-pressure methane adsorption behavior of glucose-derived graphene

摘要

A simple, promising, environmentally friendly, and high yield technique to synthesize high specific surface area (SSA) and porous graphene-like materials from glucose precursor through carbonization and controlled chemical iron chloride (FeCl3) activation was demonstrated. Designing this nanoporous graphene-based adsorbent with high SSA, abundant micropore volume, tunable pore size distribution, and high adsorption capacity, is crucial in order to deal with the demands of large-scale reversible natural gas storage applications. Raman spectroscopy, BET method of analysis, and N(2)adsorption/desorption measurements at 196 degrees C were adopted to evaluate the structural and textural properties of the resultant glucose derived-graphene (gluGr) samples. The effects of different carbonization conditions, such as the inert environments (argon, helium, and argon) and temperatures (700, 800, 900, and 1,000 degrees C), have been studied. A glucose-derived graphene carbonized under nitrogen environment at 700 degrees C (NGr700) with highly interconnected network of micropores and mesopores and large SSA (767 m(2)/g) exhibited excellent methane (CH4) storage property with exceptionally high adsorption capacity, superior to other glucose-derived graphene (gluGr) samples. A maximum volumetric capacity up to 42.08 cm(3)/g was obtained from CH(4)adsorption isotherm at 25 degrees C and 35 bar. Note that the adsorption performance of the CH(4)is highly associated with the SSA and microporosity of the gluGr samples, especially NGr700 that was successfully synthesized by FeCl(3)activation under N(2)environment.