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Synthesis of undoped and M-doped ZnO (M Co, Mn) nanopowder in water using microwave irradiation

Undoped and M-doped ZnO (M Co, Mn) nanopowders have been successfully synthesized by microwave-assisted approach using Zn(NO3) 2.2H2O and NaOH. The results obtained from X-ray diffraction (XRD) analysis and the transmission electron microscopy (TEM) showed that the mean particle size was about 10-15 nm. The XRD analysis of the synthesized samples also showed a single phase ZnO structure without any additional phase. Magnetic property studies of the as-prepared M-doped ZnO (M Co, Mn) samples showed them to be paramagnetic material. However, thermal annealing in air of particular samples at 800°C for 3 h resulted in transforming the samples into a room temperature ferromagnetic material. © 2009 IOP Publishing Ltd.

 Tuyen N.V., Canh T.D., Long N.N., Nghia N.X., Trinh B.N.Q., Shen Z.
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