Dresden 2026 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

MA: Fachverband Magnetismus

MA 7: Poster Magnetism I

MA 7.24: Poster

Monday, March 9, 2026, 09:30–12:30, P2

Enhancement of Magnetic and Photocatalytic properties of MnZn/CdZn core/shell structures via lattice matching. — •Ahmed Faramawy, Hesham El-Sayed, Adel Abdel-Sattar, and Romany Nessem — Ain Shams University, Cairo, Egypt

Core/shell nanostructures of ferrite as shell (Mn0.7Zn0.3Fe2O4/CdxZn1-xFe2O4 (x = 0-0.)) were successfully synthesized via a hydrothermal route to explore the role of lattice matching on their structural, magnetic, optical, and photodegradation properties. X-ray diffraction and Rietveld refinement confirmed the formation of single-phase spinel structures with coherent core/shell interfaces. TEM and EDX mapping verified uniform shell growth and compositional gradients, indicating true core/shell formation. Moreover, the saturation magnetization showed a 14% enhancement at x = 0.3 due to optimal lattice coherence and minimal interfacial strain. Optical analysis showed that the direct bandgap decreased. The observed bandgap narrowing and high Urbach energy at moderate Cd2+ levels indicate improved electronic mobility and reduced activation energy for charge transport. Furthermore, Photocatalytic activity studies confirm that the synthesized Mn0.7Zn0.3Fe2O4/CdxZn1-xFe2O4 core-shell nanocomposites have excellent photodegradation behaviour to methylene blue (MB) compared to the bare core.

Keywords: MNPs; Core/shell; Lattice mismatching effect; Magnetization; MB degradation