Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1905
Title: Graphene/Single-Walled Carbon Nanotube Composites Generated by Covalent Cross-Linking
Authors: Pramoda, K.
Kumar, Ram
Rao, C. N. R.
Keywords: Chemistry
Carbon
graphene
nanotubes
porous materials
superhydrophobicity
Conjugated Microporous Polymers
Coupling Reagents
Dioxide Capture
Surface-Area
Large-Scale
Frameworks
Adsorption
Functionalization
Acetylenes
Reduction
Issue Date: 2015
Publisher: Wiley-V C H Verlag Gmbh
Citation: Chemistry-an Asian Journal
10
10
Pramoda, K.; Kumar, R.; Rao, C. N. R., Graphene/Single-Walled Carbon Nanotube Composites Generated by Covalent Cross-Linking. Chemistry-an Asian Journal 2015, 10 (10), 2147-2152.
Abstract: Composites of graphene and single-walled carbon nanotubes (SWNT) have been generated by covalent cross-linking through two different coupling strategies, namely Sonogashira and EDC (1-ethyl-3-(3-dimethylaminopropyl) carbodiimide) coupling reactions. The obtained assemblies have been characterized by various microscopic and spectroscopic techniques. The assemblies obtained by Sonogashira coupling exhibit high surface area, the value increasing with the graphene content. The highest surface area obtained is 1260 m(2)g(-1) in the composition with highest graphene content (graphene: SWNT 1: 4). These composites show a uniform slit-shaped porous network with pores of approximately 1-2 nm. CO2 uptake of this assemblies is in the range 11-15 wt% at 273 K (1 atm) and 9-11 wt% at 298 K (1 atm), whereas the H-2 uptake is in the 1-1.3 wt% range at 77 K (1 atm). The composites generated by Sonogashira coupling show superhydrophobicity with high contact angles in the range from 159-163 degrees. The EDC-coupled composites show less surface area than the composites from Sonogashira coupling.
Description: Restricted access
URI: http://hdl.handle.net/10572/1905
ISSN: 1861-4728
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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