4.7. Removal of methylene blue dye by metal-organic framework
(NiFe2O4)@SiO2@ HKUST-1
with different percentages.
To remove methylene blue dye as an environmental contaminant from dyeing
wastewater, Methylene blue aqueous solution (10 mg/L) was first prepared
then take 100 ml of it as a sample and add 0.1 gr of
(NiFe2O4)@SiO2@HKUST-1
NiFe2O4@SiO2 degradation
by 30, 50% wt. to the colored solution and also add 1 ml of oxygenated
water (H2O2) and subjected to
ultrasonication for complete mixing. Then every 10 minutes the sample
was taken and centrifuged and finally, using a spectrophotometer, they
obtained their wavelengths. by using the resulting wavelengths, the
values of the removal of any of the metal organic frameworks can be
calculated over time.
Fig (19): Diagram of methylene blue dye removal using nanocomposites
with different percentages of nickel ferrite in a silica substrate
As can be seen in Fig (19), the synthesized 30%
NiFe2O4@SiO2)@HKUST-1
nanocomposite had the highest removal in a shorter time than the 50% by
weight metal-organic framework nanocomposite. As a result, within 60
minutes approximately 98% of dye removal was observed. For this reason,
the magnetic metal-organic framework nanocomposite 30%
NiFe2O4@SiO2@HKUST-1 was
used in different conditions.