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Separations 2017, 4(1), 5; doi:10.3390/separations4010005

Graphene Oxide Nanoparticles and Their Influence on Chromatographic Separation Using Polymeric High Internal Phase Emulsions

1
School of Chemical Sciences, Dublin City University, D09 W6Y4 Dublin 9, Ireland
2
APC Ltd., Cherrywood Business Park, Loughlinstown, D18 DH50 Dublin, Ireland
3
Australian Centre for Research on Separation Science; ARC Centre of Excellence for Electromaterials Science, School of Physical Sciences, University of Tasmania, Hobart, 7001 TAS, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Zuzana Zajickova
Received: 8 December 2016 / Revised: 19 January 2017 / Accepted: 7 February 2017 / Published: 11 February 2017
(This article belongs to the Special Issue Monolithic Columns in Separation Sciences)
View Full-Text   |   Download PDF [2407 KB, uploaded 11 February 2017]   |  

Abstract

This work presents the first instance of reversed-phase liquid chromatographic separation of small molecules using graphene oxide nanoparticle-modified polystyrene-divinylbenzene polymeric high internal phase emulsion (GONP PS-co-DVB polyHIPE) materials housed within a 200-µm internal diameter (i.d.) fused silica capillary. The graphene oxide nanoparticle (GONP)-modified materials were produced as a potential strategy to increase both the surface area limitations and the reproducibility issues observed in monolithic stationary phase materials. GONP PS-co-DVB polyHIPEs were found to have a surface area up to 40% lower than unmodified polymeric high internal phase emulsion (polyHIPE) stationary phases. However, despite having a surface area significantly lower than that of the unmodified material, the GONP-modified polyHIPEs demonstrated superior analyte adsorption properties. Reducing the GONP material did not have any significant impact on elution order or retention factor of the analytes, which was most likely due to low GONP loading attributed to the 250-nm GONPs utilised. The lower surface area of GONP-modified polyHIPEs provided similar separation efficiency and increased repeatability from injection to injection resulting in % relative standard deviations (%RSDs) of less than 0.6%, indicating the potential offered by graphene oxide (GO)-modified polyHIPES in flow through applications such as adsorption or separation processes. View Full-Text
Keywords: polymeric high internal phase emulsion (polyHIPE); high internal phase emulsions; graphene oxide; liquid chromatography; nanoparticles; polystyrene; divinylbenzene; monolith; macroporous materials polymeric high internal phase emulsion (polyHIPE); high internal phase emulsions; graphene oxide; liquid chromatography; nanoparticles; polystyrene; divinylbenzene; monolith; macroporous materials
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Choudhury, S.; Duffy, E.; Connolly, D.; Paull, B.; White, B. Graphene Oxide Nanoparticles and Their Influence on Chromatographic Separation Using Polymeric High Internal Phase Emulsions. Separations 2017, 4, 5.

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