| Electrodeposition of nickel – graphene oxide nanocomposite coatings using deep eutectic solvents |
| Paper ID : 1148-UFGNSM-FULL |
| Authors: |
|
Aazam Kooravand1, Sohrab Sanjabi *2 18491767834 2Tarbiat Modares University |
| Abstract: |
| Electrodeposition of graphene oxide into the metal matrix in aqueous solution is generally difficult. Using Deep eutectic solvent (DES) as the electrolyte in this work is mainly based on the following points. First of all, as a new type of ionic liquid, DES has shown promising potentials in electrodeposition of metals, alloys and composites due to its excellent properties, such as wide potential windows, high ionic conductivity, high solubility of metal salts and high viscosity. The DES provides excellent dispersion stability of particles due to its high viscosity and ionic strength, which can overcome the shortcomings in aqueous solution, viz. poor dispersion stability of the reinforcements in plating bath and low content of the particulates in matrix metals. Secondly, investigations showed that the GO particles can be stably suspended in the DES with the presence of metal ions. However, quickly settling down of the GO particles was observed in aqueous solution containing metal ions without stabilizing additives. In this study, nickel – graphene oxide (Ni–GO) composite coatings were successfully prepared by electrodeposition in choline chloride (ChCl)/urea based DES. Firstly, graphene oxide (GO) was synthesized by improved Hummers’ method and then, was added to DES and deposited on copper substrate The effect of deposition parameters such as current density and temperature on the morphology of the deposits and cathode current efficiency were investigated. Surface morphologies and microstructures of coatings and synthesized GO were studied using SEM/EDXS and XRD. Also, Furrier Transition Infrared (FTIR) was used to investigate synthesized GO. |
| Keywords: |
| Graphene oxide, Deep eutectic solvent, Nanocomposite coating, Electrochemical deposition |
| Status : Paper Accepted (Poster Presentation) |
