Synthesis and characterization some spinel nono particles using Fe,Zn,Cr,Mn metalcations and investigation of catalytic properties.

In this study,one group of spinel type oxide nanopowders ZnFe۲O۴, ZnCr۲O۴, ZnFe۱.۳Cr۰.۷O۴,ZnFe۱.۵Cr۰.۵O۴ and ZnFe۱.۸Cr۰.۲O۴ were prepared using sol-gel method provided from selectedmetallic ions and citric acid. A series of analysis were used to determine crystal characterization,morphology and grain size of the nanopowder. X-ray diffraction (XRD) patterns showed thatafter calcination process, spinel phase is only formed and they also used for determining averagegrain size of the nanopowders. Also, composition and surface morphology of these nanopowderswere examined using scanning electronic microscope (SEM) and Energy Dispersive Xray(EDX).Forier transform infrared spectra(FT-IR) and visible-ultraviolet spectra was examinedfor studying prepared nanopowders. In addition, catalytic properties and reusability of ZnFe۲O۴for synthesis symmetiric imine by using benzaldehde and ammonia has been investigated.

کلیدواژه ها:

spinel ، sol-gel ، catalyst ، nanopowders.