Graphene Oxide-Polypyrrole Coating for Functional Ceramics

Abstract

Ceramic substrates were metallized with a Ni-Mo-P electroless coating and further modified with a polypyrrole (PPy) coating by the electrodeposition method. The properties of the polypyrrole coating were studied with the addition of a graphene oxide (GO) nanomaterial prior to the electrodeposition and its reduction degree. Fourier Transform Infrared Spectroscopy, Field-Emission Scanning Electron Microscopy, Raman spectroscopy and cyclic voltammetry were employed to characterize the properties of the coatings. The results indicated the successful synthesis of conductive electrodes by the proposed approach. The electrodeposition of PPy and its charge storage properties are improved by chemically reduced GO. The surface capacitive contribution to the total stored charge was found to be dominant and increased 2–3 fold with the reduction of GO. The chemically reduced GO-modified PPy exhibits the highest capacitance of 660 F g−1 at 2 mV s−1, and shows a good cyclability of 94% after 500 charge/discharge cycles. The enclosed results indicate the use of an NiMoP electroless coating, and modification with a carbon nanomaterial and conducting polymer is a viable approach for achieving functional ceramics.

SnO2QDs Deposited on GO/PPy-Modified Glassy Carbon Electrode for Efficient Electrochemical Hydrogen Peroxide Sensor

“…To evaluate the structural morphology and surface roughness of the SGP2 composites by AFM investigation ( Figure 9 ), AFM images of the SGP2 composite show a spherical morphology, and AFM 3-D micrograph images of the SGP2 show a uniform and homogeneous morphology with high prominence, with an average roughness obtained from the topological study of 1.863 nm and a particle size of 0.3 to 5 nm. This result indicates the compatibility of the polymer matrix with nanoparticles [ 42 ].…”

The Effect of Grinding on Optical Band Gap and Urbach Energy of Polypyrrole/Graphene Composites

“…However, in the Raman spectra of composites, both D and G bands were shifted between 1330-1340 cm -1 and 1550-1570 cm -1 , which indicated the π-π interaction between PPy and xGnP. Furthermore, since the double bonds between the carbon atoms and other conjugated bonds lead to increase in the Raman intensities, the Raman intensities of polymer and polymer composites were higher than that of the commercial graphene as seen in Figure 3a [31][32][33][34].…”

Flexible conductive silk-PPy hydrogel toward wearable electronic strain sensors

“…The new emerging peaks at 770 cm −1 , 910 cm −1 and 1040 cm −1 indicate the polymerization of pyrrole molecules [29]. Among these peaks, peaks at 770 cm −1 and 1040 cm −1 can be attributed to C-H out of plane deformation vibration of the pyrrole rings and =C-H bending vibrations, respectively [30], while the peak at 910 cm −1 is induced by the iron (Fe 3+ ) ions doping in PPy, which creates polarons [31]. The characteristic peaks of PPy at 1510 cm −1 and 1440 cm −1 partly coincide with brands of the silk fibroin, assigning to C = C stretching [32].…”