Síntesis y caracterización del material cerámico aluminato de bismuto Bi24Al2O39, y evaluación de su actividad co-catalítica con dióxido de titanio en la degradación de rodamina

Abstract

This research is about the synthesis, characterization and evaluation of the ceramic material bismuth aluminate (Bi24Al2O39), with includes also the evaluation of its co-catalytic properties when accompanied with titanium dioxide (TiO2), through the degradation of dye rhodamine E-B 300. The synthesis was made by the chemical method of controlled precipitation, starting from aluminum nitrate (Al(NO3)3) and bismuth nitrate (Bi(NO3)3) as precursor reagents, and sodium hydroxide (NaOH) like precipitant reagent. Therefore, the influence of pH and the calcination condition of synthesis, which were found to be pH 10,8 and 550 °C as calcination temperature. The forbidden energy gap “band gap” was measure using diffuse reflectance spectroscopy. Then, the value reached 2,9 eV. The co-catalytic properties were measured through the degradation of solutions of rhodamine E-B 300 using as photocatalyst, several combinations of Bi24Al2O39 – TiO2 under conditions of solar and artificial light. Therefore, 74% of degradation was the highest yield obtained during a reaction time of 3 hours, using a catalyst with concentration 25 % Bi24Al2O39 – 75 % TiO2 w/w.