Filmes de ZnO contendo nanopartículas de prata depositadas em suportes magnéticos : síntese bioinspirada e eficiência na fotodegradação catalítica do corante Rodamina B

Abstract

The present work reports the synthesis, characterization and results obtained from photocatalytic degradation tests of the rhodamine B dye through magnetic Fe3O4 nanoparticles coated with ZnO and decorated with AgNPs. AgNPs were obtained from the reduction of AgNO3 through the use of Simaba trichilioides infusions. Plants have a range of biomolecules (metabolites) that are extremely important in their metabolism. Several of these biomolecules have interesting properties such as high antioxidant power, which can be applied in the development of nanotechnology in order to eliminate reagents of high toxicity and cost. Therefore, the photocatalyst with magnetic properties is interesting due to its easy recovery of the reaction medium, being able to be applied multiple times besides avoiding material losses, reducing costs and the generation of additional residues. The dye studied (Rhodamine B) is applied in several industrial sectors, mainly textiles and is one of the contaminants of most important water bodies. Several techniques will be used to characterize the material, Transmission Electron Microscopy (TEM), High Resolution Transmission Electron Microscopy (HRTEM), X-ray Dispersive Spectroscopy (EDS) X-ray Diffraction Spectroscopy (DRX), Lightning Photoelectron Spectroscopy (XPS), UV-Vis Spectroscopy, Vibrant Sample Magnetometry (VSM in order to obtain a complete physical-chemical and morphological profile of the materials. The study of dye degradation products via LC-MS will also be carried out to assess the viability of the photodegradation process.