3.6 Transmission electron microscopy (TEM) analysis
Figure (9) TEM images show the synthesized magnetic metal-organic
frameworks. The results of TEM analysis confirm the presence of some
rod-like and hemispherical particles that are connected to each other.
By observing the particles, it can be seen that the particles of the
metal-organic framework are well crystallized and synthesized as columns
(rods). These results are consistent with SEM observations. However,
nickel ferrite particles located in the silica bed have a spherical
morphology but their final shape changes when they are joined together
by a metal-organic framework and the particles are irregularly shaped
rods.
Transmission electron microscopy analysis is widely used to determine
particle size, crystallographic data such as surface characteristics as
well as particle size determination. This analysis is very useful and
applicable for composite detection of nanoparticle-modified metalorganic
frameworks because it determines nanoparticle dispersion and particle
size. Fig (9) shown transmission electron microscopy analysis and
revealed that the metal-organic framework composite was almost
rod-shaped and nickel ferrite was deposited on the silica substrate and
within the metal-organic framework network and the size of these
nanocomposites by weight percentages of 10, 30 and 50 are 20, 32 and 40
nm respectively.
Fig (9) TEM image of synthesized
NiFe2O4@SiO2@HKUST-1
metal-organic framework