Rapidly growing new branches of technologies that use different nano-sized metal oxides, include development of new techniques in diagnostics and to carry medicinal substances through human body (cancer treatment), addition to fabrics as antibacterial components, addition to common alloys to change/strengthen properties of products, etc. Because many of nano-sized metal oxides may have an adverse effects on human health, there is a immediate need to identify them as nanoparticles by using simple and fast analytical techniques.

We are presenting results of study using FT-IR spectroscopy to identify 16 metal oxides as a powder of M₂O₃ or MO and MO₂ formulas, as well as mixed oxide NiZnOFe. We tested the following nano-sized metal oxides: La₂O₃, Fe₂O₃, Bi₂O₃, Co₂O₃, Cr₂O₃, In₂O₃, V₂O₃, Al₂O₃, MgO, CoO, MnO, NiO, ZnO and TiO₂. The FT-IR spectrum for metal oxides like magnesium, manganese, nickiel, cooper, iron, lanthanum, indium and mixed oxide show the broad peaks with the whole range, while in the spectrum for other substances there are bond peaks in 250 - 1100 cm^-1 area. Fig 1. shows example of FT-IR spectrum of nanoparticles of metal oxide powders. 

FT-IR spectra of pure NiO, ZnO and Fe₂O₃ powders and NiZnOFe system were compares. The absorption bands in the FT-IR spectra of these mixtured are not characteristics od the mere oxide mixture, thus confirm a chemical interaction between the three oxide materials.

Fig. 1. The example of FT-IR spectrum of nanoparticles of metal oxide powders

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1. Ocena ryzyka nanocząstek dla zdrowia człowieka i środowiska przyrodniczego w oparciu o metody komputerowe