Materials for Energy, Efficiency and Sustainability: TechConnect Briefs 2015Materials for Energy, Efficiency and Sustainability TechConnect Briefs 2015

Fuel Cells & Hydrogen Chapter 2

Hydrothermal synthesis of uniform porous carbon nanospheres and their gas storage capacity

M.K. Lee, S.W. Nam, J.S. Han, S. Kang
Seoul National University, Korea

pp. 41 - 44

Keywords: gas storage, carbon, nano and hydrothermal

Highly porous nano carbon materials have been widely developed due to their advanced physical characteristics such as morphology, light weight, but more interestingly the possibility of designing the level of porosity as well as the specific surface area with many different approaches. This shows great potential in gas adsorption, separation, environmental treatment, energy storage and conversion, etc. Based on these properties, we investigated the synthesis of porous carbon nanosphere via two-steps process, using phenolic resol as a carbon source and block copolymer F127 as a soft template via hydrothermal process followed by graphitization. The porous nanospheres have high surface area of 1099 m2/g after KOH activation measured by nitrogen sorption isotherms. Furthermore, the surface chemistry was characterized by elemental analysis, infrared spectroscopy and x-ray photoelectron spectroscopy. The uniformity in the size of the nanospheres was verified by SEM and TEM analyses. The nanospheres show H2 uptake of 1.86 wt.% (1 bar at 77K) and CO2 adsorption capacity of 5.40 mmol/g (1 bar at 273K). The results indicate that this carbon material should have a high potential as gas adsorption carbonaceous materials.