File(s) under permanent embargo
Preparation, characterisation and modification of carbon-based monolithic rods for chromatographic applications
journal contribution
posted on 2023-05-17, 02:30 authored by Eltmimi, AH, Barron, L, Rafferty, A, Hanrahan, JP, Fedyanina, O, Nesterenko, E, Nesterenko, PN, Brett PaullBrett PaullA range of porous carbon-based monolithic (PCM) rods with flow-through pore sizes of 1, 2, 5 and 10 m, were produced using a silica particle template method. The rods were characterised using SEM and energy-dispersive X-ray spectroscopy, BET surface area and porous structure analysis, dilatometry and thermal gravimetry. SEM evaluation of the carbon monolithic structures revealed an interconnected rigid bimodal porous structure and energy-dispersive X-ray spectroscopy analysis verified the quantitative removal of the embedded silica beads. The specific surface areas of the 1, 2, 5 and 10 m rods were 178, 154, 84 and 125 m2/g after pyrolysis and silica removal, respectively. Shrinkage of the monolithic rods during pyrolysis is proportional to the particle size of the silica used and ranged from 9 to 12%. Mercury porosimetry showed a narrow distribution of pore sizes, with an average of 700 nm for the 1 m carbon monolith. The suitability of bare and surface oxidised PCM rods for the use as a stationary phase for reversed and normal phase LC was explored. The additional modification of PCM rods with gold micro-particles followed by 6-mercaptohexanoic acid was performed and ion-exchange properties were evaluated.
Funding
University of Tasmania
History
Publication title
Journal of Separation ScienceVolume
33Issue
9Pagination
1231-1243ISSN
1615-9306Department/School
School of Natural SciencesPublisher
Wiley-VCH Verlag GmbH & Co.Place of publication
Weinheim, GermanyRights statement
The definitive published version is available online at: http://interscience.wiley.comRepository Status
- Restricted