Obtenção de nanofios de óxido de níquel (II) e indicativos de aplicação no sensoriamento de glifosato em meio aquoso

Abstract

With the increasing demand for agricultural products along with the modernization of rural areas, also urges the need for pesticide residue monitoring on environmental matrices, seen that its cumulative effects can be adverse, especially in aquatic media. As nanotechnology arises, known materials began to be researched for new properties due to its nanometric scale. On an array of possible applications for such materials, semiconducting metallic oxides has been used for the development of chemical sensor devices. Aiming to evaluate the possibilities of nanostructured nickel (II) oxide material in response to glyphosate concentration in aqueous medium, this work has proceeded in three major steps: the synthesis of the material by chemical precipitation of its hydroxide precursor followed by thermal decomposition; the chemical characterization by means of infrared, visible-ultraviolet and energydispersive X-ray spectroscopy, crystallographic analysis by X-ray powder diffraction and morphological determination by scanning electron microscope; the interaction of the as synthesized material with glyphosate aqueous solution by spectral analysis along the visible and ultraviolet electromagnetic band. The results shown in this work agree with the obtainment of nickel (II) oxide semiconducting nanowires with around 74 nm thickness and its positive interaction with glyphosate in micromolar concentrations, been an indicative of its possible applications as a platform for chemical sensor devices.