Microparticles of a-Bi2O3 Obtained from Bismuth Basic Nitrate [Bi6O6(OH)2(NO3)4·2H2O] with Photocatalytic Properties
Por:
Karen V.G., Hernández-Gordillo A., Oros-Ruiz S., Rodil S.E.
Publicada:
1 ene 2021
Ahead of Print:
1 ene 2020
Resumen:
Alpha phase bismuth oxide (a-Bi2O3) microparticles were prepared through the annealing at 600 °C of basic bismuth nitrate [Bi6O6(OH)2(NO3)4·2H2O] precursors with different morphologies and crystallinity that were obtained by a chemical precipitation method. The precursors were synthesized using ethylenediamine (EN) solvent and varying the HNO3/Bi3+ and HNO3/EN molar ratios, with and without thermal reflux. The influence of the HNO3/EN molar ratio and the thermal reflux on the physicochemical properties of the Bi6O6(OH)2(NO3)4·2H2O precursors and the obtained a-Bi2O3 phase were analyzed by X-ray diffraction, thermogravimetric and differential scanning calorimetric analysis, FTIR analysis, scanning electron microscopy and diffuse reflectance spectroscopy. A correlation between the chemical composition of the Bi6O6(OH)2(NO3)4·2H2O precursors and the physicochemical properties of a-Bi2O3 phase was proposed. Finally, the photocatalytic activity of the a-Bi2O3 microparticles was tested in the photodegradation of indigo carmine dye under UV–A light. © 2020, Springer Science+Business Media, LLC, part of Springer Nature.
Filiaciones:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior SN, Ciudad Universitaria, México City, Coyoacán 04510, Mexico
Departamento de Química, Área de Catálisis, Grupo ECOCATAL, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No 186, Ciudad de México, 09340, Mexico
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