Synthesis and Characterization of Cobalt Nanoparticles Prepared by Arc Discharge Method Using an Ultrasonic Nebulizer

Abstract

Magnetic cobalt nanostructured was synthesized by a two-stage method. First, a solution of cobalt precursor droplets was prepared by an ultrasonic nebulizer. Second, the arc discharge method between two electrodes in an inert gas at atmospheric pressure is used to obtain the nanostructured cobalt powder. The sample obtained was characterized by X-ray diffraction (XRD). Scanning electron microscope (SEM), High Resolution Transmission Electron Microscope (HR-TEM), UV-Vis Spectrophotometry, zeta potential (ZP) and vibrating sample magnetometer (VSM). The dielectric constant, and AC conductivity of the prepared sample was determined in the frequency range of 4 Hz to 8 MHz. The investigations showed that the Co nanoparticles prepared in this way have smaller and homogeneous nanoparticles with spherical shape morphology with good stability and unique magnetic properties as compared with the bulky one. The dielectric properties analysis shows an enhancement in the dielectric constant and the AC conductivity of the Co nanoparticles.

Synthesis of cobalt, palladium, and rhenium nanoparticles

“…Arc discharge is also used for the nanomaterial synthesis, in which a potential difference across two electrodes generates thermal plasma. El-Khatib et al [78] synthesized CoNPs via a two-step arc discharge method in which cobalt precursor droplets were prepared using an ultrasonic nebulizer, and subsequently pyrolyzed by applying arc discharge between two silver electrodes in an Ar gas at atmospheric pressure. Jyothi et al [79] synthesized CoNPs via laser ablation technique in which supersaturated Co vapor was produced by pulsed laser.…”

Synthesized Silver Carbon Nanotubes and Zinc Oxide Nanoparticles and their Ability to Remove Methylene Blue Dye

“…by using (poly vinyl pyrrolidone or sodium citrate) [24], where zeta potential exceeded -50mV, which indicates good stability when using sample in long term duration [25]. Electrical arc discharge method simply produces low impurity yield with low cost compared to other chemical methods [26][27]. There is lot of scope for improvisation by modifying the arc discharge parameters to produce high quality and quantity yield.…”