Abstract
In this study, NiFe2O4, CdO, and NiFe2O4@CdO nanocomposites were synthesized using a chemical co-precipitation process. Transmission electron microscopy (TEM) and selected area electron diffraction (SAED) analysis showed the crystallinity of NiFe2O4 and CdO. X-ray powder diffraction (XRD), and Fourier-transform infrared spectroscopy (FTIR) indicate the formation of NiFe2O4 and CdO. In UV–Vis analysis, the optical band gap of nanocomposites was increased compared to the pristine NiFe2O4. The chemical state was elucidated from X-ray photoelectron spectroscopy (XPS). The electrical properties of NiFe2O4 were enhanced in nanocomposites. For nickel ferrite, it is 0.8 × 10−5 S cm−1 and increased up to 2 × 10−3 S cm-1 for 0.5NiFe2O4@0.5CdO. Experimental, find that the degradation of methylene blue (MB) has an influential effect by CdO amount under UV–Visible light. NiFe2O4@CdO nanocomposites revealed improved photocatalytic performance, compared to the pristine NiFe2O4. Improved photocatalytic performance may be attributed to the availability of active sites and retard electron-hole recombination for degradation. NiFe2O4@CdO nanocomposites can be retrieved from the solution via the strong magnet.
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