Facile synthesis of copper oxide nanoparticles using copper hydroxide by mechanochemical process

Document Type : Research Paper

Authors

Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran

Abstract

A facile mechanochemical-based method for synthesis of copper oxide (CuO) nanoparticles is here by introduced. For this purpose, copper hydroxide powder was synthesized through a facile solution method (CuSO4 + 2 Na(OH) → Cu(OH)2 + Na2SO4) after which milling of as-prepared Cu(OH)2 precursor and NaCl resulted in the mechanochemical dehydration of Cu(OH)2 and dispersion of CuO nanoparticles into the salt matrix (Cu(OH)2+2NaCl=CuCl2+2NaOH and then CuCl2+2NaOH=CuO+2NaCl+H2O). Subsequently, washing the milled powders led to the removal of salt matrix and separation of CuO particles. The main advantages of the introduced method are synthesis of CuO nanoparticles with narrow size distribution without subsequent annealing during the process. The results of X-ray diffraction (XRD) indicated that the dehydration of Cu(OH)2 into CuO was completed after three hours of milling. Structural analysis using scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS), transmission electron microscopy (TEM) and particle size analyzer (PSA) showed that CuO particles had moderately equiaxed shape with sizes ranging from 10-27 nm. Also, the results of UV–visible absorption spectroscopy indicated that CuO nanoparticles had a band gap of 2.5 eV.

Keywords

References

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Journal of Ultrafine Grained and Nanostructured Materials
Volume 48, Issue 1 - Serial Number 1
Spring & Summer
June 2015
Pages 37-44

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History

  • Receive Date: 17 November 2014
  • Revise Date: 21 April 2015
  • Accept Date: 20 May 2015

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