Sorption Capacity and Electrical Capacitance of Three-Dimensional Carbon Networks

C. Rojas, N. Santacruz, V. Dorvilien, F. Mendoza, S. Michea, G. Morell, B.R. Weiner
University of Puerto Rico,
United States

Keywords: 3D carbon network, CO2 adsorption, CVD deposition


We synthesized three-dimensional (3D) carbon structures by Chemical Vapor Deposition (CVD) and characterized their structural properties. We employed the 3D pore system of different zeolites (NaY, SBA-15, and ZMS-5) as solid template structures to assist in the synthesis of 3D carbon network structures. The carbon source consisted of radicals formed from the thermal decomposition of acetone, in a relatively facile and fast chemical deposition process. The 3D carbon network structures were characterized with X-ray diffraction, Raman spectroscopy, spectroscopy, surface area measurement, scanning electron microscopy, and transmission electron microscopy. The carbon networks deposited in the pores consist of reduced graphene oxide and multiwalled carbon nanotubes; their size distribution correlates with the size of the pores of zeolites. We studied the CO2 gas storage capacity of the 3D carbon networks at ambient conditions, showing that these are functional carbon materials with high sorption capacity about twice that of activated carbon. Furthermore, we assembled the carbon networks into double-layer capacitors and measured a specific capacitance to be around 120 F/g