Micellar Electrokinetic Chromatography of Graphene and Chemically Modified Graphenes with Dodecylbenzenesulfonate

Abstract

Graphene and chemically modified graphenes were resolved by micellar electrokinetic chromatography (MEKC) using sodium dodecylbenzenesulfonate (SDBS) as a micelle matrix. Graphene was successfully dispersed in a micellar solution, and a consecutive and broad signal was obtained by the MEKC with a 20 mmol dm -3 aqueous SDBS solution for Graphene Nanoplatelets. Chemically oxidized graphene was less retained to the micelle than the Graphene Nanoplatelets by the proposed MEKC, and they were resolved with each other.

Migration Behavior of Carbon Nanotube in Capillary Electrophoresis with Sodium Dodecyl Sulfate and Water-Soluble Nonionic Polymer

“…Both a broad peak and shot signals were detected in the electropherograms. While the broad peak was reproducibly detected, the shot signals were not reproducible neither in the number of the When an MEKC separation was examined with graphene, a different type of carbon material, SDBS was found to be a good surfactant to disperse graphene in an aqueous solution [22]. Both a broad peak and shot signals were detected with graphene in the electropherograms.…”

“…In the comparison of the surfactants between SDS and SDBS, the broad peak was detected with the SWCNT in the wide concentration range of SDS; SDS is a better surfactant than SDBS to disperse CNT in an aqueous solution, while SDBS is better with graphene [22]. The predominance of SDBS on dispersion of graphene was explained by the π -π interaction between the benzene ring in SDBS and the graphene plane [22].…”

“…Both a broad peak and shot signals were detected with graphene in the electropherograms. Since graphene is composed of wide variety of the 2-dimensional structure, the dispersed graphene is detected as continuous signals of individual graphene successively detected [22]. The shot signals were suppressed at SDBS concentrations of around 20 mmol dm −3 [22].…”

“…Since graphene is composed of wide variety of the 2-dimensional structure, the dispersed graphene is detected as continuous signals of individual graphene successively detected [22]. The shot signals were suppressed at SDBS concentrations of around 20 mmol dm −3 [22]. It was concluded that low concentrations of SDBS is not enough to dissolve the graphene, and high concentration of SDBS or salts promote the aggregation of graphene in an aqueous solution [22,23].…”

“…The shot signals were suppressed at SDBS concentrations of around 20 mmol dm −3 [22]. It was concluded that low concentrations of SDBS is not enough to dissolve the graphene, and high concentration of SDBS or salts promote the aggregation of graphene in an aqueous solution [22,23]. Therefore, the broad peaks in Fig.…”