SINTESIS DAN KARAKTERISASI KOMPOSIT Fe3O4@ZnO DENGAN METODA PRESIPITASI

SYNTHESIS AND CHARACTERIZATION OF Fe3O4@ZnO COMPOSITE THROUGH
PRECIPITATION METHOD. Fe3O4@ZnO composite has been synthesized trough precipitation
method with the ratio between Fe3O4 and ZnO are 1:1, 1:2, dan 1:3. Characterization of the sample
was performed using X-ray diffractometer (XRD), scanning electron microscope (SEM) equipped with
energy dispersive spectrophotometer (EDS), vibrating sample magnetometer (VSM) and
transmission electron microscope (TEM). The XRD pattern shows that the sample consisted of Fe3O4 nanoparticles and ZnO phases. Magnetic saturation value (Ms) of Fe3O4 were measured by VSM
obtained about 62.92 emu / g, but then the value of Ms dropped to13.60 emu/g with the addition of
ZnO content. TEM observation showed a spherical structure of Fe3O4 aggregate about 20 nm in
diameter, and embedded in the ZnO shell. EDS spectrum revealed that the Fe3O4@ZnO composites
were only observed three types of elements, namely Fe, Zn and O. This shows evidence that the
coating on the surface of Fe3O4 nanoparticles is the outer shell of ZnO. Fe3O4@ZnO composites with
Fe3O4 and ZnO ratio is 1: 2 shows a more homogeneous coating ZnO.