The surface morphology, structure, size and crystal structure
of self-prepared Fe3O4@SiO2@H2Dz MNPs were characterized by
SEM (30 kV working voltage), TEM and X-ray diffraction, respectively.
The functionalization of dithizone on Fe3O4@SiO2 MNPs was
demonstrated by FT-IR characterization. UV–visible spectroscopy
was used for the quantification of the loaded H2Dz on Fe3O4@SiO2
MNPs, and the surface area and the pore size were determined by
specific surface area and porosity analyzer. With Mg-ray as X-ray
source, the adsorption mechanism of target ions on prepared MNPs
was investigated by XPS.