Fabrication of single‐walled carbon nanohorns incorporated a monolithic column for capillary electrochromatography

Abstract

Single-walled carbon nanohorns have received great interest for their unique properties and diverse potential applications. Herein, we demonstrated the feasibility of single-walled carbon nanohorns incorporated poly(styrene-divinylbenzene) monolith as the stationary phase for capillary electrochromatography, which were prepared by one-step in situ copolymerization. Single-walled carbon nanohorns were dispersed in styrene to give a stable and homogeneous suspension. The monolithic column gave effective separation for a wide range of aromatic compounds, which was based on hydrophobicity and π-π electrostatic stacking of single-walled carbon nanohorns. The precisions of migration time and peak area varied in the ranges of 1.4-1.9% for intraday trials and 1.7-3.5% for interday trials, and 3.2-6.7% for intraday trials and 4.1-7.4% for interday trials, and 3.6-7.2% for inter-column trials and 5.2-21.3% for inter-column trials, respectively, indicating the good reproducibility of single-walled carbon nanohorns embedded monolithic columns.

Recent developments of monolithic and open‐tubular capillary electrochromatography (2017–2019)

“…Two types of hydroxyl functionalized multiwalled carbon nanotubes (OH‐MWCNTs) incorporating poly(glycidyl methacrylate‐coethylen glycol dimethacrylate) monolithic columns for CEC analysis were developed by Ganewatta et al. . The incorporation of OH‐MWCNTs provided an increase in hydrophobic interactions with nonpolar solutes and π–π interactions with aromatic solutes.…”

Recent strategies to enhance the performance of polymer monoliths for analytical separations

“…A similar approach was developed to prepare polymer monolith containing SWNHs in a spin column format for the extraction of NSAIDs from human urine . These carbon nanostructures were also incorporated into poly(styrene‐ co ‐divinylbenzene) monoliths by one‐step in situ copolymerization and applied as CEC stationary phases .…”