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Microwave-assisted purification of detonation nanodiamond

journal contribution
posted on 2023-05-18, 02:35 authored by Mitev, DP, Ashley TownsendAshley Townsend, Brett PaullBrett Paull, Nesterenko, PN
In the present work microwave-assisted purification approaches for detonation nanodiamond (DND) are considered, and the resultant impurity content of purified DND revealed by direct ICP-MS and elemental analysis. A significant reduction in noncarbon contaminants as compared with detonation soot was achieved with resulting purity of 99.95%. Surface characterisation including scanning electronic microscopy, low temperature adsorption of nitrogen, acid–base potentiometric titration, zeta potential measurements and particle size distribution of the DND in suspensions revealed distinctive surface properties for each purified DND sample. Results highlight the suitability of the microwave purification approach using acid reagents, allowing nanodiamonds with different and reproducible surface properties to be produced or modified. Contamination effects from laboratory glassware used to store samples were carefully considered. Refined DND with impurity levels over two orders of magnitude lower than commercially available samples was prepared. The profile and concentration levels of residual impurities in purified samples of nanodiamond are discussed with identification of possible reasons for contamination.

History

Publication title

Diamond and Related Materials

Volume

48

Pagination

37-46

ISSN

0925-9635

Department/School

School of Natural Sciences

Publisher

Elsevier Science Sa

Place of publication

Po Box 564, Lausanne, Switzerland, 1001

Rights statement

Copyright 2014 Elsevier B.V

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the chemical sciences

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