Abstract

Rahmayeni, Syukri Arief, Novesar Jamarun, Emriadi and Yeni Stiadi

DOI : http://dx.doi.org/10.13005/ojc/330608

Magnetically separable ZnO-MnFe₂O₄ nanocomposites were synthesized in organic-free media. The samples were characterized by several techniques. The photocatalytic activities of the nanocomposites were tested by degradation of Rhodamine B and wastewater of batik dye under natural sunlight irradiation. X-ray diffraction (XRD) pattern of composites is well in agreement with the standard of the hexagonal wurtzite phase of ZnO and spinel cubic phase of MnFe₂O₄. Scanning Electron Microscope (SEM) image illustrates the morphology of the nanocomposites are square plate-like and porous. The magnetic properties of composites were characterized by Vibrating Sample Magnetometer (VSM) show the superparamagnetic properties of all nanocomposites. Optical properties study indicated that addition of MnFe₂O₄ to ZnO decreases the band gap. The removal of Rhodamine B (10 mg L⁻¹) and wastewater of batik dye solution by ZnO-MnFe₂O₄ (1:0.1) composite after 3 h reached 96.7% and 95.1 %.

ZnO-manganese Ferrite; Organic-free Media; Superparamagnetic; Dye; Sunlight

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