Graphene nanosheets by low-temperature thermal reduction of graphene oxide using RF-CVD

Abstract

A novel technique for synthesis of thin-layered graphene sheets (GNS) were established by hydrogen-induced reduction of graphene oxide at low temperature of 200 C, using radio frequency chemical vapour deposition. The functional group and microstructures of the prepared GNS were characterised by various techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy, Raman spectroscopy and particle-size analyser. Further the as-prepared GNS with an average diameter of 528.8 nm was confirmed by particlesize analyser. This GNS-generation process is rapid with high efficiency of exfoliation process, non-toxic, environmental friendly and ideal for large-scale production for industrial applications.

Synthesis and characterization of graphene oxide–polyimide nanofiber composites

“…Among the salient features observed are the bands at 1716, 1557 and 1035 cm À1 , corresponding to the stretching modes of C]O, -C]C and C-O-C groups in GO respectively. 15,17,19 This journal is © The Royal Society of Chemistry 2014 and 1544 cm À1 ), consistent with the presence of PAA. Aer heat treatment, which led to amidation of PAA between 50 and 125 C and imidization at around 350 C, the carboxylic -OH stretching band was found to be absent, indicating the conversion of PAA to PI.…”

“…The ratio of the intensities of the D-band and G-band is 0.85 and it indicates the presence of defects introduced in graphene during the oxidation process. [15][16][17] The distinctive X-ray powder diffractogram features of graphite and the synthesized GO are presented in Fig. 2(c) and (d).…”

Rheological behavior and electrical properties of polypyrrole/thermally reduced graphene oxide nanocomposite

“…The G band assigned to the first order scattering of the E 2 g phonon of TRGO represent the in-plane bond stretching vibration of sp 2 -bonded carbon atoms in a 2D hexagonal lattice. The D band is associated with the breathing mode of K-point phonons of A 1g symmetry with vibration of carbon atoms with dangling bonds in plane terminations of disordered graphite [25,29]. The sharp peak observed at 2700 cm −1 was assigned to 2D band and it is well known key parameter to judge both the formation and layer numbers of the graphene sheets.…”

“…Thermally reduced graphene oxide was synthesized by radio frequency chemical vapor deposition method (RF-CVD) [25]. The weight ratio of pyrrole to graphene oxide was varied as 100:1, 100:2, 100:3, 100:4 and 100:5 and the resulting composites were named as Ppy/TRGO1, Ppy/TRGO2, Ppy/TRGO3, Ppy/TRGO4 and Ppy/TRGO5, respectively.…”

Rheological behavior ‐ Electrical and thermal properties of polypyrrole/graphene oxide nanocomposites

“…The G band assigned to the first‐order scattering of the E 2g phonon of GO represents the in‐plane bond stretching vibration of sp 2 ‐bonded carbon atoms in a 2D hexagonal lattice. The D band can be associated with the breathing mode of K‐point phonons of A 1g symmetry with vibration of carbon atoms with dangling bonds in plane terminations of disordered graphite . In the Raman spectrum of pure Ppy, the characteristic bands that appeared at 1565 and 1347 cm −1 were assigned to the CC backbone stretching and the ring stretching vibration of Ppy, respectively .…”