Evaluación del método de síntesis de nanopartículas de magnetita para la producción a escala

Abstract

The objective of this research was to synthesize at scale magnetic iron nanoparticles (NPMs), from the chemical method of co-precipitation and characterize them by optical methods to obtain size and composition data. Thus, NPMs were synthesized following different techniques based on the bibliographic literature; five assays were performed, each one having a variation both in the amount of reagents and in the control of variables in the synthesis process. Thus, the assay with which the best size results were obtained in the atomic force microscope was the second one in which five samples are evidenced, of which two of them, sample 1 and sample 5, present homogeneity in the ferro-fluid solution, with sizes from 10 to 20 nm and from 12 to 25 nm respectively; therefore of these two techniques the technique of sample 5 was selected since it is the most viable, simple process and has all the materials and reagents available, besides it is easily scalable to produce a considerable amount of nanoparticles. However, with the technique already selected, the synthesis was carried out by increasing the amount of reagents and did not obtain favorable size results. This was verified by scanning electron microscopy (SEM) analysis, since this analysis yields images in dimension and from the use of the ImagenJ program it was possible to visualize the average size of these particles, being 20 µm. Therefore, it is recommended to analyze the variables involved in this research to avoid agglomeration of the nanostructures.