Electronic and optical competence of TiO2/BiVO4 nanocomposites in the photocatalytic processes
Por:
Drisya, K. T., Solis-Lopez, M., Rios-Ramirez, J. J., Duran-Alvarez, J. C., Rousseau, A., Velumani, S., Asomoza, R., Kassiba, A., Jantrania, A., Castaneda, H.
Publicada:
11 ago 2020
Categoría:
Multidisciplinary
Resumen:
Nanocomposites with different ratios of titanium dioxide and bismuth
vanadate [TiO2]/[BiVO4] give rise to compatible electronic band
structure alignment at their interfaces to ensure enhanced
photoactivated charge transfer under visible light. The sol-gel method
and suitable post-synthesis thermal treatments were used to synthesize
different compositions with stabilized anatase phase of TiO2 and
monoclinic scheelite polymorph BiVO4. Structural, electronic and optical
characterizations were performed and the results were analysed as a
function of the stoichiometry, in which both crystalline structures show
a clear junction formation among their characteristic stacking planes.
Photocatalytic and (photo) electrochemical responses of the
nanocomposites were investigated and tested for the degradation of azo
dyes (Acid Blue-113, AB-113) (similar to 99%) under visible light
radiation. The nanocomposite with a mass ratio of (1:10) shows the
highest photocatalytic efficiency compared to the other compositions.
HRTEM images showed marked regions in which both crystalline structures
form a clear junction and their characteristic planes. However, the
increase of BiVO4 content in the network overcomes the photocatalytic
activity due to the decrease in the reduction potential of the
photo-generated electrons with high recombination rates.
Filiaciones:
Drisya, K. T.:
Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
Le Mans Univ, Inst Mol & Mat Le Mans, UMR CNRS 6283, F-72085 Le Mans, France
Solis-Lopez, M.:
Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
Rios-Ramirez, J. J.:
Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
Duran-Alvarez, J. C.:
Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol, Circuito Exterior S-N,Ciudad Univ,POB 70-186, Mexico City 04510, DF, Mexico
Rousseau, A.:
Le Mans Univ, Inst Mol & Mat Le Mans, UMR CNRS 6283, F-72085 Le Mans, France
Velumani, S.:
(Corresponding Author), Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
(Corresponding Author), Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
Asomoza, R.:
Inst Politecn Nacl CINVESTAV IPN, Dept Elect Engn Sees, Ctr Invest & Estudios Avanzados, Av Inst Politecn Nacl 2508, Mexico City 07360, DF, Mexico
Kassiba, A.:
(Corresponding Author), Le Mans Univ, Inst Mol & Mat Le Mans, UMR CNRS 6283, F-72085 Le Mans, France
Le Mans Univ, Inst Mol & Mat Le Mans, UMR CNRS 6283, F-72085 Le Mans, France
Jantrania, A.:
Texas A&M Univ, Dept Biol & Agr Engn, Agrilife Extens, College Stn, TX 77843 USA
Castaneda, H.:
Texas A&M Univ, Dept Mat Sci & Engn, College Stn, TX 77843 USA
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