Copper oxide nanoparticles: Synthesis, characterization, optical property and its application for the removal of methyl green dye

Document Type : Original Research Paper


Department of Chemistry, Faculty of Science, Golestan University, Gorgan, Iran



In this paper, nanoparticles of copper oxide (CuO) were synthesized using solid-state
thermal decomposition of the new copper precursor at 600 ºC for 3 h. The
copper precursor was prepared from the mixture of CuCl2.6H2O and benzoic acid
in H2O in the presence of KOH. Nanoparticles of copper oxide were characterized
by Fourier transform infer-red (FT-IR), UV-Vis, and photoluminescence (PL)
spectroscopy X-ray powder diffraction (XRD) and transmission electron
microscopy (TEM). All results confirmed the preparation of the pure phase of CuO
nanoparticles. In addition, the adsorption of methyl green in an aqueous solution of
copper oxide nanoparticles as adsorbent was studied at various parameters such
as adsorbent dosage and agitation time. It was found that methyl green dye
removal increased by adsorbent dosage (0-30 mg) and contact time (0-120 min).
This research revealed that the copper oxide nanoparticles could be used as a
suitable adsorbent for the removal of various organic dyes from aqueous solutions.