Nanoestruturas de óxido de cobre obtidas por novo método hidrotermal de microondas
Abstract
Synthesis and characterization of Copper Oxide nanostructured by means
of hydrothermal assisted by microwaves were studied in this work. The thermal
treatment device was set up by using a domestic microwave oven and a
hydrothermal chamber, specially adapted as a hydrothermal reactor. The
obtained nanostructures of CuO have been characterized by X-ray diffraction
(XDR) to determine its crystallinity; by field emission scanning electron
microscopy (SEM-FEG) and transmission electron microscopy to characterize
the morphology and single crystal nature of nanocrystals formed. The
mechanism of nanostructure formed and nanostructure morphology of CuO
were studied us a function of processing conditions. For this, the influence of
microwave processing, the nature of chemical basis and presence/absence of
polyethylene glycol (PEG) as template have been considered during the
formation of nanostructured CuO. The chemistry reaction for attaining the
nanostructure of CuO was studied using stereochemistry concept and
computational quantum chemistry. The results had demonstrated that the
formation of copper oxide nanostructure depend on the stereochemistry of the
template, on the chemical base for hydrothermal treatment and on the use of
microwave heating for hydrothermal synthesis.