NOVEL CELLULOSE/NbOPO4 center dot nH(2)O HYBRID MATERIAL FROM SUGARCANE BAGASSE
Data de publicação2011-01-01
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In recent years studies concerning the applications of lignocellulosic/inorganic couples have resulted in the development of an interesting class of functional materials. In this work a cellulose/NbOPO4 center dot nH(2)O hybrid using cellulose from surgacane bagasse was prepared and characterized in order to test for adsorption applications. The preparation process was conducted by carrying out metallic niobium dilution in hydrofluoric acid in the presence of nitric acid, then adding boric acid to form the complex and, finally, the cellulose sugar cane bagasse was added. Concentrated phosphoric acid was also inserted to precipitate hydrous niobium phosphate particles in the cellulose fiber. This material was characterized by X-ray diffractometry (XRD), thermogravimetry (TG/DTG), and scanning electronic microscopy (SEM) connected to an energy dispersive spectrophotometer (EDS). Results by SEM/EDS show that NbOPO4 center dot nH(2)O was present in structure of the cellulose. During the preparation of the material, using boric acid it was observed that the formation of precipitate occurred in a shorter time than the material prepared without boric acid.