engleski

Influence of the addition of plant material in the microwave-assisted synthesis of iron oxides

Magnetite particles are usually synthesized from Fe2+ and Fe3+ precursors in a 1:2 ratio, while in this work only Fe3+ was used as precursor. Furthermore, aside from changing precursor, the influence of the addition of extracts of Lavandula spica L. and Spartium junceum L. and the influence of different experimental conditions (synthesis at 200 °C for 20 min and 260 °C for 5 min) on the final iron oxide product phases were investigated. The obtained products were analyzed by Fourier infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD) and field emission scanning electron microscope (FE-SEM). An indication of the presence of a magnetite phase in the products synthesized with plant extract addition was the characteristic magnetite peak in the FTIR spectra around 570 cm-1 (for products synthesized at both 200 °C and 260 °C), while the FTIR spectra of the reference sample (withouht the plant materials) synthesized at 200 °C showed goethite (~ 890 and 790 cm-1 ) and hematite (~640, 540 and 460 cm-1 ) and only hematite phase peaks were detected for reference sample synthesized at 260 °C. Magnetite particles are visible in FE-SEM images under high magnification. In this way, a new, environmentally friendly method of magnetite synthesis was established.

Lavandula spica L. ; magnetite ; microwave synthesis ; Spartium junceum L.

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