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B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties

We report on the synthesis of photoferroic Cr(3+)-doped BaTiO(3) nanoparticles with nominal Cr content ranging from 2–8 mol% by a microwave-assisted hydrothermal method. The absorption properties of the doped systems are significantly enhanced due to the d–d band transition of Cr(3+/4+). The structu...

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Autores principales: Amaechi, I. C., Kolhatkar, G., Youssef, A. Hadj, Rawach, D., Sun, S., Ruediger, A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9065759/
https://www.ncbi.nlm.nih.gov/pubmed/35515525
http://dx.doi.org/10.1039/c9ra03439k
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author Amaechi, I. C.
Kolhatkar, G.
Youssef, A. Hadj
Rawach, D.
Sun, S.
Ruediger, A.
author_facet Amaechi, I. C.
Kolhatkar, G.
Youssef, A. Hadj
Rawach, D.
Sun, S.
Ruediger, A.
author_sort Amaechi, I. C.
collection PubMed
description We report on the synthesis of photoferroic Cr(3+)-doped BaTiO(3) nanoparticles with nominal Cr content ranging from 2–8 mol% by a microwave-assisted hydrothermal method. The absorption properties of the doped systems are significantly enhanced due to the d–d band transition of Cr(3+/4+). The structural properties of the materials are examined on the basis of lattice distortions given by the tolerance factor and microstrain. Raman scattering provides complementary information on the lattice vibrations indicating a softening of the longitudinal optic (LO) phonon mode located at 716 cm(−1) with increasing Cr concentration. The charge transport properties investigated through electrochemical impedance spectroscopy (EIS) demonstrate that there is a reduction in the charge transfer resistance from 5.2 Ω to 4.3 Ω for the undoped and 4 mol% Cr(3+)-doped respectively, which favors the degradation kinetics. The photo-oxidation ability of the systems is evaluated by time evolution of photodegradation of methyl orange under standardized solar irradiation. The experimental results confirm that the best photocatalytic performance is achieved with the 4 mol% Cr(3+)-doped BaTiO(3) nanoparticles, which is ∼2.7 times higher than for the undoped sample. Evidence of superoxide radical being the dominant active species is provided by in situ reactive oxide species (ROS) capture experiments.
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spelling pubmed-90657592022-05-04 B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties Amaechi, I. C. Kolhatkar, G. Youssef, A. Hadj Rawach, D. Sun, S. Ruediger, A. RSC Adv Chemistry We report on the synthesis of photoferroic Cr(3+)-doped BaTiO(3) nanoparticles with nominal Cr content ranging from 2–8 mol% by a microwave-assisted hydrothermal method. The absorption properties of the doped systems are significantly enhanced due to the d–d band transition of Cr(3+/4+). The structural properties of the materials are examined on the basis of lattice distortions given by the tolerance factor and microstrain. Raman scattering provides complementary information on the lattice vibrations indicating a softening of the longitudinal optic (LO) phonon mode located at 716 cm(−1) with increasing Cr concentration. The charge transport properties investigated through electrochemical impedance spectroscopy (EIS) demonstrate that there is a reduction in the charge transfer resistance from 5.2 Ω to 4.3 Ω for the undoped and 4 mol% Cr(3+)-doped respectively, which favors the degradation kinetics. The photo-oxidation ability of the systems is evaluated by time evolution of photodegradation of methyl orange under standardized solar irradiation. The experimental results confirm that the best photocatalytic performance is achieved with the 4 mol% Cr(3+)-doped BaTiO(3) nanoparticles, which is ∼2.7 times higher than for the undoped sample. Evidence of superoxide radical being the dominant active species is provided by in situ reactive oxide species (ROS) capture experiments. The Royal Society of Chemistry 2019-07-03 /pmc/articles/PMC9065759/ /pubmed/35515525 http://dx.doi.org/10.1039/c9ra03439k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Amaechi, I. C.
Kolhatkar, G.
Youssef, A. Hadj
Rawach, D.
Sun, S.
Ruediger, A.
B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title_full B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title_fullStr B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title_full_unstemmed B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title_short B-site modified photoferroic Cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
title_sort b-site modified photoferroic cr(3+)-doped barium titanate nanoparticles: microwave-assisted hydrothermal synthesis, photocatalytic and electrochemical properties
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9065759/
https://www.ncbi.nlm.nih.gov/pubmed/35515525
http://dx.doi.org/10.1039/c9ra03439k
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