Síntese de caracterização de BaWO4 sintetizado pelos métodos sonoquímico e de coprecipitação

Abstract

Nanoscience and nanotechnology are very current areas of science and aim at the study and technological use of materials of nanometric sizes for the manufacture of new materials. So they have gained a lot of space in several researches, since they have been collaborating for the progress of other fields of study. The study and application of new materials are among the research bases of nanoscience and nanotechnology. In these research areas, nanomaterials are widely used in the most varied areas of technology, since they have attractive properties related to their size and shape. Therefore it is necessary to improve systems that maintain these properties more stable for long periods of time, making their application really effective without losing their characteristics. Among the various materials that can be developed with nanometric dimensions, tungstates have received much attention in the scientific and technological aspects, being considered the class of nanomaterials with more diverse properties, presenting a vast use in the production of new materials. In the literature there is a great variety of synthetic methods used to obtain nanostructured materials as barium tungstate (BaWO4) and therefore it is imperative to analyze a stability of the developed nanoparticles for a choice of the method that is employed. Considering the great applicability of barium tungstate presents, it is necessary to study it, seeking the improvement in the synthesis for its obtaining, in which it can be a factor of great importance in the structural and chemical characteristics that a material can present.In this way, this work approached the synthesis of barium tungstate by the method of sonochemistry and coprecipitation because they present a series of advantages in relation to the other methods used to obtain this material, such as: chemical homogeneity, easy accomplishment, morphology control, among others. The obtained powders were characterized by means of X-Ray Diffraction (XRD), Absorption Spectroscopy in the Infrared Region (IR) and Scanning Electron Microscopy (SEM). The XRD results indicated that the materials analyzed have a tetragonal structure of In this way, this work approached the synthesis of barium tungstate by the method of sonochemistry and coprecipitation because they present a series of advantages in relation to the other methods used to obtain this material, such as: chemical homogeneity, easy accomplishment, morphology control, among others. The obtained powders were characterized by means of X-Ray Diffraction (XRD), Absorption Spectroscopy in the Infrared Region (IR) and Scanning Electron Microscopy (SEM). The XRD results indicated that the materials analyzed have a tetragonal structure of In this way, this work approached the synthesis of barium tungstate by the method of sonochemistry and coprecipitation because they present a series of advantages in relation to the other methods used to obtain this material, such as: chemical homogeneity, easy accomplishment, morphology control, among others. The obtained powders were characterized by means of X-Ray Diffraction (XRD), Absorption Spectroscopy in the Infrared Region (IR) and Scanning Electron Microscopy (SEM). The XRD results indicated that the materials analyzed have a tetragonal structure of the Scheelite type. The characteristic asymmetric Stretching and deformation modes for the (WO4) group were detected by the Infrared Spectroscopy. SEM micrographs showed the existence of micro-octahedra with similar morphologies presenting " Microballoons" forms.