Synthesis of Titanium Oxide (IV) dopped with rare earth for the removal of Cyanide
DOI:
https://doi.org/10.15381/ci.v26i1.27485Keywords:
Titanium (IV) oxide, Rare earth, Sol-gel, anatase, cyanideAbstract
This paper presents the synthesis of Titanium (IV) Oxide doped with rare earths for cyanide removal in aqueous systems. The synthesis was carried out by the Sol-gel method from an organic Titanium precursor that allows us to obtain the anatase phase; 4 materials were obtained, one pure and 3 doped with Lantano, Cesium and Europium at 1% molar concentration, respectively. The materials obtained were characterized by x-ray diffraction, x-ray fluorescence, infrared spectroscopy and microscopy. To each material, the percentage of cyanide removal was evaluated by applying a dose of 1 g / L of material to an aqueous solution of 40 mg / L of CN- with the help of a reactor with a UV lamp that favors photocatalysis and continuous flow of the solution during 120 min, the concentration of CN- was determined every 20 min. For this, a UV spectrophotometric method was used, which consisted of reacting the problem solution with sodium picrate to obtain a reddish orange coloration.
After the treatments, it was possible to demonstrate the removal of CN-, being more significant with the TiO2.Ln 1%.
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Copyright (c) 2023 Ricardo León, Wilson León, Delly San Martin, Sergio Valverde
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