Fabricação e caracterização de compósito magnético argila-óxido de ferro

Abstract

The growing demand for materials with magnetic properties has driven the development of new composites that combine characteristics from different substances due to their applications in various fields, such as recovery of degraded areas, vehicles for controlled drug delivery, oil recovery, and the purification of water produced during drilling operations. This study investigated the fabrication and characterization of magnetically modified clay using the co-precipitation method from ferric chloride and iron salts, aiming to form a ferrimagnetic phase. The characterization of the clay-iron oxide composite and the sodium clay was performed through X-ray diffraction spectroscopy (XRD), optical microscopy (OM), and Fourier-transform infrared spectroscopy (FTIR). The synthesis of iron oxide nanoparticles in the presence of clay was successful, leading to the formation of a magnetic clay-iron oxide composite. Structural characterization techniques (XRD and FTIR) indicated that the predominant phase is magnetite, a ferrimagnetic phase. Optical microscopy images showed a more textured surface for the magnetic composite compared to the images of the clay. These images suggest that the clay surfaces were coated by iron nanoparticles.