Influence of structural and morphological variables on the optical and electrical response of Na-doped BFOs

Bautista-Morantes, Adán de Jesús; Calderón-Carvajal, Carlos Ordulio; Gómez-Cuaspud, Jairo Alberto; Vera-López, Enrique

doi:10.1016/j.mset.2024.05.001

Materials Science for Energy Technologies

2024

DOI: 10.1016/j.mset.2024.05.001

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Influence of structural and morphological variables on the optical and electrical response of Na-doped BFOs

Adán de Jesús Bautista-Morantes,

Carlos Ordulio Calderón-Carvajal,

Jairo Alberto Gómez-Cuaspud

et al.

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2024

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Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂

Rátiva-Parada,

Gómez-Cuaspud,

Cerón-Achicanoy

et al. 2024

International Journal of Materials Research

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The study of six compositions of Cu@N-TiO2 with different amounts of copper and nitrogen synthesized using a sol–gel method is reported. X-ray diffraction patterns and Raman spectra indicated the formation of a single anatase TiO2 phase in all materials without evidence of secondary phases including copper or nitrogen. Electron microscopy images showed a homogeneous distribution of the copper particles around a TiO2 matrix, just as that the insertion of nitrogen did not have a significant effect on the morphology of the particles. X-ray photoelectron spectroscopy analysis confirmed that nitrogen was inserted in the atomic arrangement of titanium dioxide, while copper was presented mainly as metallic element on the TiO2 surface. Characterization of the optical properties and photoactivity test confirm that band gap strongly depends on the copper and nitrogen content phenomenon attributed to the combined presence of modifiers over the TiO2 surface and the promotion of a plasmonic effect, which displaced the absorption UV bands to higher wavelengths with respect to un-doped TiO2. The catalytic test performed using rhodamine-B as probe molecule, confirm that TiCuN2 and TiCuN3 samples exhibit the best decomposition percentages of 38 and 36 % respectively. Such results confirm the surface plasmon resonance effect associated to Cu particles on the TiO2 as main cause in the increase in current along synthesized samples and the use of cyclic voltammetry technique to identify these effects between 0.0 and 1.5 V.

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Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂

Rátiva-Parada,

Gómez-Cuaspud,

Cerón-Achicanoy

et al. 2024

International Journal of Materials Research

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Influence of structural and morphological variables on the optical and electrical response of Na-doped BFOs

Cited by 1 publication

References 60 publications

Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂

Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂

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Influence of structural and morphological variables on the optical and electrical response of Na-doped BFOs

Cited by 1 publication

References 60 publications

Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO2

Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO2

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Product

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Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂

Examining the dual effect of copper nanoparticles and nitrogen doping on Cu@N-TiO₂