Nanopowder and Magnetic Fluid Synthesis of Zn_0.2Fe_2.8O₄ Particles and Their Structural and Magnetic Behaviors

In this paper, the authors report the fabrication of Zn_0.2Fe_2.8O₄ particles from Indonesian sand in the forms of nanopowder and magnetic fluid. The fabrication was conducted by employing a combined coprecipitation-sonochemical method. The analysis of the XRD data presented that the Zn_0.2Fe_2.8O₄ was crystallized in a spinel structure with a lattice parameter of about 8.378 Å. The data analysis of the TEM image showed the Zn_0.2Fe_2.8O₄ particles distributed in nanometric size with a spherical shape. The magnetic investigation showed that the magnetic nanopowder and fluid both had superparamagnetic character. Moreover, the band gap of the Zn_0.2Fe_2.8O₄ particles was about 2.28 eV. These characters open a significant opportunity for the prepared samples to be applied for sensory and antibacterial applications.