Single-Layered Graphene Oxide Nanosheet/Polyaniline Hybrids Fabricated Through Direct Molecular Exfoliation

Abstract

In this study, we used direct molecular exfoliation for the rapid, facile, large-scale fabrication of single-layered graphene oxide nanosheets (GOSs). Using macromolecular polyaniline (PANI) as a layered space enlarger, we readily and rapidly synthesized individual GOSs at room temperature through the in situ polymerization of aniline on the 2D GOS platform. The chemically modified GOS platelets formed unique 2D-layered GOS/PANI hybrids, with the PANI nanorods embedded between the GO interlayers and extended over the GO surface. X-ray diffraction revealed that intergallery expansion occurred in the GO basal spacing after the PANI nanorods had anchored and grown onto the surface of the GO layer. Transparent folding GOSs were, therefore, observed in transmission electron microscopy images. GOS/PANI nanohybrids possessing high conductivities and large work functions have the potential for application as electrode materials in optoelectronic devices. Our dispersion/exfoliation methodology is a facile means of preparing individual GOS platelets with high throughput, potentially expanding the applicability of nanographene oxide materials.

Electrical Properties of Graphene Polymer Nanocomposites

“…Variation in the XRD spectrum is also observed for PDA composites prepared under different temperature conditions because of the influence of experimental conditions on the exfoliation rate of RGO fillers [28]. The peak centered at 26° corresponding to the (002) plane of graphite [29] is observed in Fig. 2b [30].…”

Effect of reduced graphene oxide–silica composite in polyaniline: electrode material for high-performance supercapacitor

“…First graphite was converted into graphite oxide using modified Hummer's method reported by Chen et al [10]. In the second step, the graphite oxide was chemically reduced using hydrazine to reduced graphene oxide [11].…”

Development of Biosensors from Polymer Graphene Composites

“…The synthesized GO was then subjected to disperse in either aqueous or organic solvents. Functionalization of polymer with GO/rGO occur (a) monomer, initiator and GO mixed together and follow in situ polymerization to get graphene-based polymer composites [49][50][51]; (b) this method comprises the synthesis of polymer followed by mixing with GO/rGO to get the desired product [52].…”

“…Vallés et al reported the simultaneous reduction GO and PANi followed by the method reported by Jiménez et al [53] It includes in situ oxidative polymerization of aniline in presence of dispersed GO [49]. However, Chen et al synthesized PANi nanorod embedded single layer GO nanosheets by in situ polymerization method, where molar ratio of aniline to APS was fixed at 1:1; the weight ratio of GO to aniline was 1:2 [50]. Recently, Yang et al reported that sulfonated PANi-GO nanocomposite and poly(m-aminobenzenesulfonic acid)-GO hybrid material by mixing all the required component to get the desired product [51].…”