Contribuições ao estudo de obtenção, caracterização e interação do óxido de cobre (ii) com glifosato comercial

Abstract

This work presents a synthesis by two different methods of a (nano)material derived from copper oxide II (CuO), its structural / morphological and spectroscopic characterization, as well as the study of its interaction with the pesticide glyphosate. Glyphosate is widely used around the world and its overuse can lead to increased resistance of invasive plants and potential human health risks. Consequently, there is the need for control, sensing and remediation of this agent. The use of (nano)particles derived from metallic oxides has been growing in several fields of technology, due to its excellent physical, chemical, conductive, photochemical, catalytic and electrocatalytic properties. Thus, this work aims to synthesize (nano)cupric oxide particles by the alcothermic method, with subsequent calcination, which is a simple, low cost and non-polluting method. These (nano) materials were characterized by ultraviolet and visible (UV-Vis) and infrared (FTIR) absorption spectroscopy, field emission scanning electron microscopy (FESEM) and energy dispersive X-ray microanalysis (EDS). The interactions of this copper oxide II particles with glyphosate were observed by UV-Vis spectroscopy, varying both the concentration of the pesticide and the particulate CuO. Was also evaluated the antibacterial activity of these (nano)particles developed against Escherichia coli and Staphylococcus aureus. The alcothermic method has been shown to be a simple, viable and non-aggressive form of the copper (II) oxide environment. The results of the characterization with the method using calcination showed the formation of a polycrystalline CuO.