On the Preparation of Nickel Nanoparticles by Chemical Reduction Method: X-ray Absorption Spectroscopy

  • Liang-Hsing CHOU
  • Wen-Ching HUNG
  • Maw-Tien LEE
Keywords: chemical reduction, nanoparticle, XAS

Abstract

Nickel nanoparticles were synthesized by the chemical reduction of NiCl2 with N2H4 under controlled pH environment. During nucleation, polyvinyl pyrrolidone (PVP) was added as the protective agents for preventing the agglomeration of metal clusters. Color of the solution changed from green to blue during the reaction period. X-Ray Adsorption Spectroscopy (XAS), X-Ray Diffraction (XRD), and Transmission Electron Microscopy (TEM) analytical methods were used to characterize the product. XAS analysis showed that the reduction reaction occurred within 5 minutes after the addition of N2H4. The length of Ni-Ni bond was 2.59 nm. The results of XRD analysis of the three cases with pH ranging from 11.0 to 13.0 suggest that the optimum pH value for the reaction appeared to be 12.0. The average particle size was 2050 nm under this condition.

DOI: http://dx.doi.org/10.5755/j01.ms.22.2.12921

Published
2016-06-01
Section
TESTING AND ANALYSIS OF MATERIALS