Synthesis and Characterization of Reduced Graphene Oxide/ Polyaniline/Au Nanoparticles Hybrid Material for Energy Applications

Abstract

In this work, synthesis and characterization of reduced graphene oxide/polyaniline/Au nanoparticles (GO/PANI/NpAu) as a hybrid capacitor are presented. Graphite oxide (GO) was synthesized by a modified Hummer's method. Polyaniline was synthesized by chemical polymerization, and Au nanoparticles (NpAu) were added afterward. Fabrication of the electrodes consisted on the hybrid materials being deposited on carbon cloth electrodes. The chemical and structural properties of the electrode were characterized by high-resolution scanning electron microscopy (HRSEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (X-R), and Raman spectroscopy; the results confirm the graphene reduction, the covalent functionalization, and formation of nanocomposites and also show the polyaniline grafted graphene. The performance and evaluation of the electrodes based on grapheme oxide (GO), polyaniline (PANI), GO-PANI, and GO/PANI/NpAu nanocomposites over carbon cloth, stainless steel, and copper have been obtained in 1 M H 2 SO 4 solution, using electrochemical techniques namely: cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). They showed that GO/PANI/NpAu gave higher specific capacitance (SC) and energy values than PANI, and GO/PANI, in the order of 160 F/g. The present study introduces new hybrid material for energy applications, from the evaluation of their electrical contributions.

Synthesis and characterization of new Ce doped‐semiconductor nanocomposite with high specific capacitance

“…The XRD patterns of GO and rGO have been shown in Figure 3. It shows the intense peak (001) at 2θ = 11.35° with d = 7.69 Å, which is the characteristic peak of GO, and it is attributed to the intermingling of water molecules and the production of oxygen functional groups such as epoxy, hydroxyl, and carboxyl attached to carbon layers during strong oxidation 68,69 . The small peak observed at 2θ = 42.5° (100) is related to GO, and the peak observed at 2θ = 54.5° (004) is related to graphite and shows that small amounts of graphite phases are still present 54 .…”

Effect of Graphene Oxide Addition on the Properties of Electrochemically Synthesized Polyaniline–Graphene Oxide Films

“…The first band is attributed to the π–π* transition of a C-C aromatic bond, while the second absorption band is due to the formation of the polaron or bipolaron states for charged defects in the polyaniline [ 32 , 33 ]. The GO spectrum shows two typical signals around 235 and 310 nm −1 , corresponding to π–π* transitions of C=C and n-π* transitions of C=O respectively [ 34 ]. The typical GO signal at 235 nm −1 does not appear in the PG1 material, which is attributed to the low GO loading, while in the PG5, material a small signal at that wavelength can be seen.…”