Preparation of Graphene Nanoribbons (GNRs) as an Electronic Component with the Multi-walled Carbon Nanotubes (MWCNTs)

Abstract

Carbon nanotubes (CNTs) have a well-defined nanostructure to exhibit high electrical conductivity and chemical stability, and have been used as an advanced material to make electrodes of super-capacitor. Graphene nanoribbons (GNRs), as manufactured by unzipping the CNTs, have more flexible adjustable electrical properties than CNTs, and are regarded an even more promising material for super-capacitor electrodes. This paper presented a series of attempts to prepare GNRs by chemically treating multi-walled carbon nanotubes (MWCNTs); this is, an Oxidation-Reduction method was tried to make GNRs by unzipping MWCNTs longitudinally. Efforts were made in various trials to find conditions for Oxidation-Reduction processes to unzip MWCNTs.. With scanning electron microscopy, transmission electron microscopy, X-ray diffraction etc., characterization was performed to analysis the produced GNRs' micro-and nano-structure. Experiment was also carried out for its electro-chemical performance in the cyclic voltammetry (CV) and galvanostatic charge-discharge tests. Results as obtained so far showed that the super-capacitor electrodes as made with GNRs appeared to have higher electro-chemical performance than the MWCNTs electrodes.

Effective energy harvesting from a single electrode based triboelectric nanogenerator

“…CV curve (Figure S4 in Supplementary information) of prepared sample measured at scan rate of 100 mV/s in 1M DMF with in potential range from −1.5 to +1.5 V. The redox peaks were identified more in rGONRs/PVDF composite in comparison to the pristine rGONRs, which confirm better charge transport of rGONRs/PVDF composite. Moreover, area under the CV curve of rGONRs/PVDF is larger than the pristine rGONRs, so that the charge storage capability of this material is good in comparison to pristine rGONRs, this results are in good agreement with the literature43.…”

Unzipping Multiwalled Carbon Nanotubes under Vortex Fluidic Continuous Flow

“…Powder XRD was used to further confirm the structural change after processing in the VFD (Figure a). The as-received material has two main diffraction peaks located at 2θ = 29.7° and 51.2° (blue line) assigned to the (002) and (100) planes of MWCNTs, respectively, which implies a highly ordered graphite lattice. , After the MWCNTs in the VFD are unzipped, there is a sharp peak at 2θ = 30.1°, which is ascribed to the presence of defects in the MWCNTs, in agreement with the HRTEM images, and more oxygen-containing functional groups on the surface of unzipped MWCNTs. , In addition, the broad peak between 2θ = 22° and 26° is consistent with the exfoliation and unzipping of the outer layers of the MWCNTs and the presence of local disorder between the nanotube layers. , …”

“…25,48 After the MWCNTs in the VFD are unzipped, there is a sharp peak at 2θ = 30.1°, which is ascribed to the presence of defects in the MWCNTs, in agreement with the HRTEM images, and more oxygen-containing functional groups on the surface of unzipped MWCNTs. 49,50 In addition, the broad peak between 2θ = 22°and 26°is consistent with the exfoliation and unzipping of the outer layers of the MWCNTs and the presence of local disorder between the nanotube layers. 51,52 TGA of the as-received material and VFD-processed material was also carried out under a nitrogen atmosphere with a heating rate of 5 °C min −1 (Figure 5b).…”

Combined effect of multiwalled carbon nanotubes, graphene nanoplatelets, and aluminum trihydride on the thermal stability of epoxy composites

“…The peaks corresponding to GNP, MWCNT, and base epoxy matrix with glass fiber agree well with the data published in literature data. [38,39] Neat epoxy composite EG having a peak at 28.28 shows that it is predominantly amorphous. The peak of EG is visible in all other composites with nanofillers.…”