Influence of diluted Fe3+ doping on the physical properties of BaTiO3

Cortés-Vega, F. D.; Montero-Tavera, C.; Yáñez-Limón, J.M.

doi:10.1016/j.jallcom.2020.156513

Cited by 8 publications

(3 citation statements)

References 33 publications

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“…A continuación, se enlistan ejemplos de las estrategias documentadas en la literatura. Yañez et al (2020) presentaron un estudio de las mejoras en las propiedades estructurales, ópticas, ferroeléctricas y dieléctricas del BaTiO3 dopado con cantidades diluidas de Fe 3+ [25]; Basaleh et al (2020) reportaron una mejora en las propiedades electrónicas, ópticas y estructurales del ISSN: fotocatalizador de titanato de bario (BaTiO3) por la adición de Cu 2+ controlando el decremento de Eg a partir de la concentración del dopado [26]; Yang et al (2019) reportaron una mejora en la absorción de luz visible, menor resistencia a la transferencia de carga y un mayor rendimiento fotocatalítico del titanato de calcio (CaTiO3) con el dopado de nanopartículas de Au para la degradación de rodamina b [27].…”

Section: Antecedentesunclassified

Síntesis y caracterización de titanato de calcio (CaTiO3) como potencial sensor electroquímico de contaminantes orgánicos en solución acuosa

Hinostroza,

Trujillo Navarrete,

Félix Navarro

et al. 2024

Rev. Ci. Tec.

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Los contaminantes orgánicos son altamente tóxicos y volátiles se acumulan en los tejidos grasos; Debido a su persistencia y movilidad, es posible encontrarlas prácticamente en cualquier parte del planeta, incluso en lugares donde nunca han sido utilizadas. Por esta razón, el monitoreo y la vigilancia en los cuerpos de agua son fundamentales. En la presente investigación, se sintetizaron partículas de titanato de calcio (CaTiO3) utilizando el método de estado sólido. Las partículas se caracterizaron por diversas técnicas fisicoquímicas: difracción de rayos-X (DRX), espectroscopia Raman, microscopía electrónica de barrido (MEB), espectroscopia de dispersión de energía (EDE), espectroscopia de reflectancia difusa (ERD), y electroquímica: voltamperometría cíclica (VC), entre otras. Se encontró a través de DRX y Raman que la estructura cristalina es ortorrómbica con el grupo espacial Pbnm. Las partículas de CaTiO3 sintetizadas tienen un diámetro promedio de ≈ 2 µm; Además, el valor obtenido para la brecha de energía (Eg) fue de 3,41 eV; también presenta un paso de baja energía en un valor de 2.66 eV, que puede corresponder a los estados electrónicos mingap. El electrodo de carbón vítreo modificado con la película de CaTiO3 mostro una sensibilidad para la determinación de nitrobenceno (NB) en solución acuosa. Por lo tanto, se puede concluir que el desarrollo de partículas de CaTiO3 es una alternativa viable para ser utilizado como sensor de contaminantes orgánicos en agua.

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Section: Antecedentesunclassified

Síntesis y caracterización de titanato de calcio (CaTiO3) como potencial sensor electroquímico de contaminantes orgánicos en solución acuosa

Hinostroza,

Trujillo Navarrete,

Félix Navarro

et al. 2024

Rev. Ci. Tec.

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“…(2) doping ion, especially transition metal ions, can effectively increase the lifetime of carriers, reduce the recombination rate of electron hole pairs and increase the degree of separation of electron hole pairs. A certain number of studies reported that ion-doping, such as Li + [ 31 ], Fe 3+ [ 32 ], Mn 2+ [ 33 ], Y 3+ [ 34 ] and even NaNbO 3 [ 35 ], KNbO 3 [ 36 ], affect the crystal structure of intrinsic materials. (3) combining two semiconductors with apposite energy level and bandgap can change band bending, widen the light absorption range and accelerate carrier separation.…”

Section: Recent Advances Of Different Speciesmentioning

confidence: 99%

Recent Advances in Ferroelectric Materials-Based Photoelectrochemical Reaction

Wang

Dou³

et al. 2022

Nanomaterials

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Inorganic perovskite ferroelectric-based nanomaterials as sustainable new energy materials, due to their intrinsic ferroelectricity and environmental compatibility, are intended to play a crucial role in photoelectrochemical field as major functional materials. Because of versatile physical properties and excellent optoelectronic properties, ferroelectric-based nanomaterials attract much attention in the field of photocatalysis, photoelectrochemical water splitting and photovoltaic. The aim of this review is to cover the recent advances by stating the different kinds of ferroelectrics separately in the photoelectrochemical field as well as discussing how ferroelectric polarization will impact functioning of photo-induced carrier separation and transportation in the interface of the compounded semiconductors. In addition, the future prospects of ferroelectric-based nanomaterials are also discussed.

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“…14 This variation of hybridization of orbitals in the crystal structure is an important factor. 15 Experimentally and theoretically, Fe-doped BTO 16 and La-doped BTO 17 were found to have a reduced bandgap. However, there needs to be more explanation of band structures.…”

Section: Introductionmentioning

confidence: 98%

Defect/disorder correlated modification of transport properties from hopping to tunneling processes in BaTiO3–LaFeO3 solid solution

Maneesha,

Samantaray,

Baral

et al. 2024

Journal of Applied Physics

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Crystal structure, bandgap, and the changes in the charge conduction mechanisms in ceramics are interrelated, and the underlying physics unifies all these different phenomena. The experimental and theoretical evaluation of the electronic properties of the solid solution of (1 − x)BaTiO3–(x)LaFeO3 (x = 0, 0.015, 0.031, 0.062) is attempted in this work. Bandgap was observed to be tunable with La/Fe doping from 3.2 eV (x = 0) to 2.6 eV (x = 0.06), while the lattice disorder was found to increase. A theoretical assessment confirms a considerable shift of valence band maxima and conduction band minima with an introduction of additional defect states within the bandgap. Electron localization was also confirmed theoretically with doping. Such changes in the electronic properties were experimentally confirmed from dielectric/AC - conductivity/impedance spectroscopy studies. From different transportation models, hopping is a preferred mechanism in the less distorted BaTiO3. However, a large polaron tunneling process can be justified for the doped samples at lower temperatures. Only at higher temperatures, a small polaron tunneling can be justified for the doped samples. The transportation is affected by the grain boundaries as much as the grains themselves. A complete analysis using Nyquist plots reveals the competing contributions of these regions to the transportation mechanism and is correlated to the disorder/distortions in the lattice in terms of the formation of oxygen vacancies.

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Influence of diluted Fe3+ doping on the physical properties of BaTiO3

Cited by 8 publications

References 33 publications

Síntesis y caracterización de titanato de calcio (CaTiO3) como potencial sensor electroquímico de contaminantes orgánicos en solución acuosa

Síntesis y caracterización de titanato de calcio (CaTiO3) como potencial sensor electroquímico de contaminantes orgánicos en solución acuosa

Recent Advances in Ferroelectric Materials-Based Photoelectrochemical Reaction

Defect/disorder correlated modification of transport properties from hopping to tunneling processes in BaTiO3–LaFeO3 solid solution

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