Ni/NiO magnetic nanoparticles was prepared using Ni(CH3COO)(2) 4H(2)O as starting material, acetylacetonate (AcAc) as template and water as a green solvent under reflux condition, followed by the calcination at 400 degrees C. The product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared (FT-IR). The size distribution of individual particles were determined to be about 18-20 nm. The prepared magnetic nanoparticles was found to be a good adsorbent for Congo red from solution.

Keywords: Ni /NiO; Magnetic nanoparticles; Template; Adsorption