• Optical, magnetic and structural characterization of Zn1−𝑥Co𝑥O nanoparticles synthesized by solvothermal method

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    • Keywords

       

      Co-doped ZnO nanoparticles; transmission electron microscopy; surface area; magnetic properties.

    • Abstract

       

      Nanoparticles of Co-doped ZnO with 3.8, 7.2 and 11.5 wt% were synthesized by solvothermal method through oxalate precursor route. X-ray diffraction studies showed the formation of hexagonal ZnO structure for 𝑥 = 0.038, however, secondary phase of Co3O4 arises on increasing the Co content up to 11.5%. Transmission electron microscopic studies showed that particles are in the nano-metric regime and the grain size decreases on increasing the Co concentration. Optical reflectance measurements showed an energy bandgap, which decreases on increasing Co concentration. Specific surface area of these nanoparticles was found to be very high and comes out to be 97.6, 112.1 and 603.8 m2g-1, respectively. All the solid solutions showed paramagnetism with weak antiferromagnetic interactions. It is seen that the antiferromagnetic interaction increases on increasing Co concentration.

    • Author Affiliations

       

      Tokeer Ahmad1 Sarvari Khatoon1 Kelsey Coolahan2

      1. Department of Chemistry, Jamia Millia Islamia, New Delhi 110 025, India
      2. Department of Physics and Astronomy, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
    • Dates

       
  • Bulletin of Materials Science | News

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