In this equation, t is the average size of crystals in nanometers, λ is the X-ray wavelength in nanometers, β is the Peak width at half the maximum height in radians and θ is the peak location in the XRD pattern in degrees. Table 2 shows the location of the maximum peak in the XRD pattern and the average size of the crystals. Also, the average distance between the nanocomposite crystal plates of the synthesized magnetic metal-organic frameworks is presented. After performing the calculations, it was observed that Nanocomposite of magnetic metal-organic framework containing 50% (NiFe2O4 @ SiO2 50% @ HKUST-1) has the highest crystallinity compared to 10% and 30%.
Figure 5) a) XRD pattern of synthesized magneto-organic metal frameworks b) XRD pattern of nickel ferrite magnetic nanocomposite placed in silica substrate.
Table (2): Magnetic nanocomposites size of organic metal frameworks.