Structural studies of activated carbons by pulsed neutron diffraction

Dore, John C. and Sliwinski, Martin J. and Burian, A. and Howells, W.S. and Cazorla, D. (1999) Structural studies of activated carbons by pulsed neutron diffraction. Journal of Physics: Condensed Matter, 11 (47). pp. 9189-9201. ISSN 0953-8984. (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Pulsed neutron diffraction results are presented for a series of activated carbons with a variable microporosity. The results cover a wide Q-range extending up to 50 Angstrom(-1) and enable the pair correlation function to be evaluated with good spatial resolution. The diffraction pattern shows a broad oscillatory behaviour representative of a highly defective crystal structure and differs considerably from graphite. Detailed investigation shows that the local atomic structure is similar to that of graphite and exhibits the expected hexagonal network but that the first peak arising from the carbon-carbon bond has two components, indicating a quinoidal distortion of the network. The correlation length within the graphene sheet is short ranged and the inter-layer spacing also displays some disorder with an increased spacing compared with graphite. The data provide a good basis for the detailed modelling of the structure and exhibit characteristics that could not have been easily observed by other techniques.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences
Depositing User: M. Nasiriavanaki
Date Deposited: 22 Jun 2009 06:55
Last Modified: 18 Jul 2014 08:12
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