Photocatalytic activity of enlarged microrods of a-Bi2O3 produced using ethylenediamine-solvent
Por:
Hernandez-Gordillo, Agileo, Medina, Juan C., Bizarro, Monserrat, Zanella, Rodolfo, Monroy, B. M., Rodil, Sandra E.
Publicada:
1 ago 2016
Resumen:
Microrods of a-Bi2O3 were prepared by a simple chemical precipitation method, replacing the hydroxyl (OH-) ions by the ethylenediamine-solvent as both a precipitating and capping agent; it can also function as a morphological template. The influence of the ethylenediamine solvent concentration on the crystalline structure, optical properties, morphology, and photocatalytic activity was investigated. The prepared samples were characterized by X-ray diffraction, diffuse reflectance spectroscopy, scanning electron microscopy, Fourier transformed IR analysis, thermal analysis and photoluminescence spectroscopy. The adsorption capacity in dark conditions and the photocatalytic activity under UV-light were studied as a function of the photocatalyst load by using indigo carmine dye solution. The highest photoactivity was observed for the non-agglomerated Bi2O3 microrods obtained with ethylenediamine-solvent at 40 vol%. The photocatalytic mechanism was discussed as a function of surface oxygen vacancies generated along to the microrod surface caused by the ethylenediamine-solvent. © 2016 Elsevier Ltd and Techna Group S.r.l.
Filiaciones:
Hernandez-Gordillo, Agileo:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Mexico City 04510, DF, Mexico
Medina, Juan C.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Mexico City 04510, DF, Mexico
Bizarro, Monserrat:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Mexico City 04510, DF, Mexico
Zanella, Rodolfo:
Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Desarrollo Tecnol, Circuito Exterior S-N,Ciudad Univ,AP 70-186, Mexico City 04510, DF, Mexico
Monroy, B. M.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Mexico City 04510, DF, Mexico
Rodil, Sandra E.:
Univ Nacl Autonoma Mexico, Inst Invest Mat, Circuito Exterior SN,Ciudad Univ, Mexico City 04510, DF, Mexico
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