2.4. Synthesis of magnetic metal-organic framework
nanocomposites
NiFe2O4@SiO2@HKUST-1
The first step was dispersed 1 gr of nickel ferrite prepared in the
previous step with 50 ml ethanol and then added 2 ml (AP) and allowed to
reflow for 6 hours under reflux conditions at 80 °C for 6 h and the
resulting sediment was separated using a magnet. The second step was
re-dispersed the isolated nanoparticles with 30 ml of ethanol and then
added 3 gr (GA) and re-mixed under reflux for 3 h at 40 °C. After the
required time, the nanoparticles were collected and washed with
distilled water. The third stage was poured 1 gr of the resulting second
stage powder with 6.04 gr of copper nitrate and 4.72 gr of
H3BTC ligand and 60 ml of distilled water in the balloon
and again under reflux conditions at 100 °C for 8 hours and then stirred
vigorously. From the wash, the precipitate was placed in a vacuum oven
at 150 °C for 10 hours to dry the precipitate (Fig 3).
Fig 3: Schematic of Synthesis of magnetic metal-organic framework
nanocomposites
NiFe2O4@SiO2@HKUST-1
All synthesized magnetic metal-organic frameworks nanocomposites are
presented in Table 1. Nickel ferrite nanocomposites embedded in silica
substrate with weight ratios of SiO2 x
(NiFe2O4)/(100-x) which (x = 10, 30 and
50 wt.%) was synthesized according to the synthesis method mentioned in
Section 2-2. Then their magnetic metal-organic frameworks were
synthesized and identified by the synthesis method mentioned in Section
2-4.
Table1: Introducing Sample Names.