The microwave-assisted synthesis and characterization of Zn1 - xCoxO nanopowders

Luc Huy Hoang, Pham Van Hai, Nguyen Hoang Hai, Pham Van Vinh, Xiang Bai Chen, In Sang Yang

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17 Scopus citations


In this paper, we present a simple microwave-assisted synthesis of Zn1 - xCoxO nanopowders. With the advantages of the microwave-assisted method, we have successfully synthesized good crystalline quality and good surface morphology Zn1 - xCoxO nanopowders. The nanopowders are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-VIS absorption, and micro-Raman spectroscopy. We found, in the synthesis process, the surfactant Triethanolamine (TEA) plays an important role on the morphology of Zn1 - xCoxO nanoparticles. The XRD study shows that for Co doping up to 5%, Co2+ ions are successfully incorporated into the ZnO host matrix. The absorption spectra of Zn1 - xCoxO (x = 1-5%) nanopowders show several peaks at 660, 611 and 565 nm, indicating the presence of Co2+ ions in the tetrahedral sites. The Raman study shows that the linewidth of E2low mode increases with Co concentration, which further indicates the incorporation of Co2+ ions into the ZnO host matrix.

Original languageEnglish
Pages (from-to)962-965
Number of pages4
JournalMaterials Letters
Issue number8
StatePublished - 30 Apr 2010

Bibliographical note

Funding Information:
This work was supported by NAFOSTED Grant , 2010 Key Project of Vietnam National University, Hanoi, Viet Nam and Quantum Metamaterials Research Center financed by Korea Science and Engineering Foundation Grant ( R11-2008-503-03001 ).


  • Microwave-assisted synthesis
  • Optical properties
  • ZnCoO nanopowders


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