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:
Karen V.G.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior SN, Ciudad Universitaria, México City, Coyoacán 04510, Mexico
Hernández-Gordillo A.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior SN, Ciudad Universitaria, México City, Coyoacán 04510, Mexico
Oros-Ruiz S.:
Departamento de Química, Área de Catálisis, Grupo ECOCATAL, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco No 186, Ciudad de México, 09340, Mexico
Rodil S.E.:
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior SN, Ciudad Universitaria, México City, Coyoacán 04510, Mexico
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