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Doping of ZnO nanopowders with Mn, Ni and Cr In an ultrasound and microwave driver hydrothermal reaction |
| Anita Grzeda 1, Agnieszka Opalińska 2,3, Aharon Gedanken 4, Ewa Grzanka 2, Marek Godlewski 5,6, Sergiy A. Yatsunenko 5, Witold Łojkowski 2 |
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1. Warsaw University of Technology, Faculty of Chemistry, Noakowskiego 3, Warszawa 00-664, Poland |
| Abstract |
Nano-sized powders of Mn, Cr, Ni and Co ions doped ZnO have been synthesized in a sonochemical reactor and in a microwave domestic oven. The density, grain size and lattice parameters of the samples have been investigated as a function of the ions concentration in the reaction substrates. Our result indicate that in Mn ions doped (or alloyed) powders no precipitates are observed even 20 mol% doping level. Phase analysis of the powders obtained shows that at 10% concentration of ions in the reaction substrates only for Mn doping pure ZnO phase was observed. For the other elements a peak corresponding to their oxides appears, indicating a lower solubility limit in the ZnO lattice then the case of Mn. For Mn doped samples, luminescence and magnetic properties of the samples were measured. The result obtained indicate that both the ultrasound and microwave driven reactions are suitable for doping ZnO with transition metals ions. However, the microwave reaction was more efficient, most likely because of the higher average temperature comparing to the ultrasound driven one. |