Ronny Silva - Academia.edu (original) (raw)
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Papers by Ronny Silva
Plastics, Rubber and Composites, 2021
Novel polyaniline (Pani) and/or graphite (Gr)/molybdenum dioxide (MoO 2) composites have been suc... more Novel polyaniline (Pani) and/or graphite (Gr)/molybdenum dioxide (MoO 2) composites have been successfully synthesised via an in situ chemical polymerisation method using a Deep Eutectic Solvent (DES) as the electrolyte. The chemical structure and properties of the Pani composites were characterised using various analytical techniques such as Raman, FTIR and UV-Vis spectroscopies, Thermo-Gravimetric Analysis (TGA), X-ray diffraction (XRD) and conductivity measurements, confirming its semi-crystalline nature. The results show shifts in the Raman, XRD and FTIR spectral features associated with the Pani composites, indicating that a matrix of metal oxide and/or graphite had formed in the polymer. Higher electrical conductivity was observed for the Pani/Gr (5.58 S cm −1) and Pani/Gr/MoO 2 (9.87 S cm −1) composites compared to pure Pani (1.25 S cm −1). The homogenous growth of Pani chains on the graphite and MoO 2 network were clearly observed by Scanning Electron Microscopy (SEM) and Energy Dispersive Analysis by X-ray (EDAX). A larger surface area and greater porosity were achieved in the Pani/MoO 2 , Pani/Gr/MoO 2 and Pani/Gr samples, while a more compact structure was obtained for the Pani sample. These findings support that the idea that the polymer/graphite composites would be more useful for electrochemical charge transport, supercapacitance and energy storage applications compared to those using the pure polymer alone.
Plastics, Rubber and Composites, 2021
Novel polyaniline (Pani) and/or graphite (Gr)/molybdenum dioxide (MoO 2) composites have been suc... more Novel polyaniline (Pani) and/or graphite (Gr)/molybdenum dioxide (MoO 2) composites have been successfully synthesised via an in situ chemical polymerisation method using a Deep Eutectic Solvent (DES) as the electrolyte. The chemical structure and properties of the Pani composites were characterised using various analytical techniques such as Raman, FTIR and UV-Vis spectroscopies, Thermo-Gravimetric Analysis (TGA), X-ray diffraction (XRD) and conductivity measurements, confirming its semi-crystalline nature. The results show shifts in the Raman, XRD and FTIR spectral features associated with the Pani composites, indicating that a matrix of metal oxide and/or graphite had formed in the polymer. Higher electrical conductivity was observed for the Pani/Gr (5.58 S cm −1) and Pani/Gr/MoO 2 (9.87 S cm −1) composites compared to pure Pani (1.25 S cm −1). The homogenous growth of Pani chains on the graphite and MoO 2 network were clearly observed by Scanning Electron Microscopy (SEM) and Energy Dispersive Analysis by X-ray (EDAX). A larger surface area and greater porosity were achieved in the Pani/MoO 2 , Pani/Gr/MoO 2 and Pani/Gr samples, while a more compact structure was obtained for the Pani sample. These findings support that the idea that the polymer/graphite composites would be more useful for electrochemical charge transport, supercapacitance and energy storage applications compared to those using the pure polymer alone.