The role of hydroxide ions in the synthesis of Ni nanoparticles using high temperature Polyol Method

• Published in: Applied Mechanics and Materials
• Main Author: 2-s2.0-84886647072
• Format: Conference paper
• Language: English
• Published: 2013
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84886647072&doi=10.4028%2fwww.scientific.net%2fAMM.391.18&partnerID=40&md5=04b9e11728fe3e9cc22874f1ea985050

This study investigate the role of hydroxide ions (OH-) in the synthesis of Ni nanoparticles through polyol method at the temperature of 180°C. Ni nanoparticles were prepared using ethylene glycol (EG) as the solvent and hydrazine (N2H4) as the reducing agent. Sodium hydroxide (NaOH) was used to introduce the OH- in solutions. Amount of OH- has been controlled through manipulation of OH- /Ni2+ ratios. The role of OH- has been discussed in terms of size, morphology and reaction rate. Particles size and morphology were determined by Transmission Electron Microscopy (TEM). X-Ray Diffractometer (XRD) was used to verify the chemical composition of as-synthesized particles. The results demonstrated that at temperature of 180°C, Ni nanoparticles can be synthesized even without the existance of OH-. Although there no significant particles size changes,synthesis without OH- showed the most rapid reaction as compared to samples with OH-. Probable mechanisms for formation of Ni nanoparticles with and without OH- are also discussed. This finding contribute to a new rapid and facile synthesis of Ni nanoparticles. © (2013) Trans Tech Publications, Switzerland.