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Thermally controlled growth of carbon onions within porous graphitic carbon-detonation nanodiamond monolithic composites

Citation

Duffy, E and He, X and Nesterenko, EP and Brabazon, D and Dey, A and Krishnamurthy, S and Nesterenko, PN and Paull, B, Thermally controlled growth of carbon onions within porous graphitic carbon-detonation nanodiamond monolithic composites, RSC Advances, 5, (29) pp. 22906-22915. ISSN 2046-2069 (2015) [Refereed Article]


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Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/

DOI: doi:10.1039/c5ra00258c

Abstract

Unique porous carbon monoliths containing thermally annealed carbon onions, were prepared from a resorcinol formaldehyde precursor rod, containing silica gel acting as a hard template, detonation nanodiamond, and Fe3+ as a graphitisation catalyst. Detonation nanodiamond was converted to carbon onions during controlled pyrolysis under N2, where the temperature cycle reached a maximum of 1250 C. Thermal characterisation and high resolution electron microscopy have confirmed the graphitisation of nanodiamond, and revealed the resulting quasi-spherical carbon onions with an average particle size of 5.24 nm. The bimodal porous composite contains both macropores (5 μm) and mesopores (10 nm), with a BET surface area of 214 m2 g−1 for a nanodiamond prepared monolith (0.012 wt% nanodiamond in the precursor mixture), approximately twice that of blank monoliths, formed without the addition of nanodiamond, thus providing a new approach to increase surface area of such porous carbon rods. Raman spectroscopy and X-ray photoelectron spectroscopy also confirmed an enhanced graphitisation of the monolithic carbon skeleton resulting from the elevated thermal conductivity of the added nanodiamond. TEM imaging has confirmed the nanodiamond remains intact following pyrolysis at temperatures up to 900 C.

Item Details

Item Type:Refereed Article
Keywords:porous carbon, carbon onions, nanodiamond, composites
Research Division:Chemical Sciences
Research Group:Macromolecular and Materials Chemistry
Research Field:Physical Chemistry of Materials
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Duffy, E (Miss Emer Duffy)
UTAS Author:Nesterenko, PN (Professor Pavel Nesterenko)
UTAS Author:Paull, B (Professor Brett Paull)
ID Code:100245
Year Published:2015
Funding Support:Australian Research Council (DP110102046)
Web of Science® Times Cited:6
Deposited By:Chemistry
Deposited On:2015-05-07
Last Modified:2017-10-30
Downloads:210 View Download Statistics

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