Structural, optical and photocatalytic properties of Ni doped BiFeO3 nanoparticles

Sahni, Mohit; Kumar, Sushant; Chauhan, Sunil; Singh, Munendra; Pandit, Soumya; Sati, Prakash Chandra; Kumar, Manish; Kumar, Arvind; Kumar, Naresh

doi:10.1016/j.matpr.2020.10.234

Cited by 11 publications

(4 citation statements)

References 8 publications

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“…Based on the above XRD analyses, we found that calcining ZnO with melamine provided favorable conditions for the growth of non-polar (100) planes. It is known that oxygen vacancies formed mainly at the (100) surface of ZnO [ 29 ]. Combined with XPS, Raman and UV-Vis absorbance analyses, these results revealed that ZnO-X has more defects located at interfaces than ZW, which could provide more active sites for photocatalytic reaction and facilitate the transfer of photoinduced electron/hole pairs to the interface, leading to a higher photocatalytic activity of ZnO-X in comparison with ZW [ 29 , 30 ].…”

Section: Resultsmentioning

confidence: 99%

“…It is known that oxygen vacancies formed mainly at the (100) surface of ZnO [ 29 ]. Combined with XPS, Raman and UV-Vis absorbance analyses, these results revealed that ZnO-X has more defects located at interfaces than ZW, which could provide more active sites for photocatalytic reaction and facilitate the transfer of photoinduced electron/hole pairs to the interface, leading to a higher photocatalytic activity of ZnO-X in comparison with ZW [ 29 , 30 ]. Therefore, with the enhanced adsorption properties of ZnO-X, the combination of oxygen vacancies with orientated growth led to the improvement of the photocatalytic property of ZnO-X.…”

Section: Resultsmentioning

confidence: 99%

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Melamine-Assisted Thermal Activation Method for Vacancy-Rich ZnO: Calcination Effects on Microstructure and Photocatalytic Properties

Wang,

Lv,

Wang

et al. 2023

Molecules

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Defect engineering is considered an effective method to adjust the photocatalytic properties of materials. In this work, we synthesized the vacancy-rich ZnO rods with (100) planes via the melamine-assisted thermal activation method. A high concentration of oxygen vacancies was successfully introduced into non-polar oriented ZnO rods by calcination. The effect of oxygen vacancy on the photocatalytic properties of non-polar-oriented ZnO rods was investigated. Raman and XPS spectra revealed the formation of oxygen vacancies in the ZnO. The results showed that the growth habit and defects in ZnO can be controlled by changing the ratio of ZnO to melamine. The higher ratio of ZnO to melamine led to more amounts of (100) planes and oxygen vacancies in ZnO, and it reached the highest when the ratio was 1.2:1. When the ratio was 1.2:1, ZnO exhibited a high methyl orange degradation rate (95.8%). The differences in oxygen vacancy concentration and non-polar planes were responsible for the improvement in photocatalytic performance. ZnO exhibited good stability and regeneration capacity. After recycling four times, the degradation rate was still at 92%. Using the same method, vacancy-rich α-Fe2O3 was obtained. This work could offer a new and simple strategy for designing a photocatalyst with oxygen vacancies.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Melamine-Assisted Thermal Activation Method for Vacancy-Rich ZnO: Calcination Effects on Microstructure and Photocatalytic Properties

Wang,

Lv,

Wang

et al. 2023

Molecules

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“…Liu et al reported multi-element (La, Er, Zn, Ti) doping of BiFeO 3 thin films, resulting in reduced leakage current and improved ferroelectric properties [ 26 ]. Ni-doped BiFeO 3 nanoparticles displayed reduced optical band gap compared to undoped BiFeO 3 nanoparticles [ 27 ]. The appropriate substitutions and optimized concentrations are key parameters to appreciably modify the properties of a material.…”

Section: Introductionmentioning

confidence: 99%

Tunable Optical and Multiferroic Properties of Zirconium and Dysprosium Substituted Bismuth Ferrite Thin Films

et al. 2022

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This work presents optical and multiferroic properties of bismuth ferrite thin films that are affected by zirconium and dysprosium substitution. Non-centrosymmetric BiFeO3,Bi0.95Zr0.05FeO3, and Bi0.95Dy0.05FeO3 thin films were coated on Pt/TiO2/SiO2/Si substrates using the spin coating method. The crystal structure, optical properties, microstructural, ferromagnetic, and ferroelectric properties of doped bismuth ferrite thin films were systematically investigated. From the XRD patterns, all the prepared thin films matched well with the rhombohedral structure with R3c space group with no observed impurity phases. The average crystallite size of the bismuth ferrite thin films were between 35 and 47 nm, and the size depended on the type of dopant. The determined energy band gap values of BiFeO3, Bi0.95Dy0.05FeO3, and Bi0.95Zr0.05FeO3 thin films were 2.32 eV, 2.3 eV, and 2 eV, respectively. Doping of Dy and Zr at the Bi site led to reduced surface roughness. The prepared thin films exhibited enhanced ferromagnetic and ferroelectric properties. The remnant magnetization of Zr-doped BiFeO3 was greater than that of the BiFeO3 and Dy-doped BiFeO3 thin films. From the obtained results, it was concluded that Zr-doped BiFeO3 thin films are suitable for solar cell fabrication.

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“…The plethora of functionalities of BFO presents not only opportunities to study their fundamental physics offering potential applications in information storage, spintronics, sensors, and even in medical applications [6][7][8][9][10][11][12][13] but also an important kind of visible-light responsive photocatalyst for water splitting and degradation of organic pollutants [3,6,7,14]. Thanks to its narrow bandgap (2.1 to 2.8 eV) [9] and excellent chemical stability, it has attracted considerable attention.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of pure BiFeO3 and Bi2Fe4O9 nanostructures with enhanced photocatalytic activity

Taazayet

Zouari

Hosni

et al. 2021

J Mater Sci: Mater Electron

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In the present work, pure BiFeO 3 and pure Bi 2 Fe 4 O 9 single phases were successfully synthesized by tailoring hydrothermal synthesis route. The structural and morphology analyses have been achieved by X-ray diffraction and by electron microscopy. Scanning and transmission electron microscopy images revealed a strong change in the morphology from agglomerated nanoparticles with sizes less than 10 nm for BiFeO 3 to plate-like particles with larger sizes (edges of 100 to 200 nm while a thickness of * 30 nm) for Bi 2 Fe 4 O 9 . Such a small size obtained for BFO nanoparticles has never been observed before for similar synthesis method without any added reagents, to the best of our knowledge. The photocatalytic activity of the as-prepared samples for degradation of methylene blue dye under sunlight irradiation shows a good efficiency. It reaches 61% and 83% after 3 h for BiFeO 3 and Bi 2 Fe 4 O 9 nanostructures, respectively. Despite a bigger size and higher bandgap, the better efficiency of Bi 2 Fe 4 O 9 compared to BiFeO 3 is explained by a much stronger absorption especially for light with energy higher than 2.65 eV.

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Structural, optical and photocatalytic properties of Ni doped BiFeO3 nanoparticles

Cited by 11 publications

References 8 publications

Melamine-Assisted Thermal Activation Method for Vacancy-Rich ZnO: Calcination Effects on Microstructure and Photocatalytic Properties

Melamine-Assisted Thermal Activation Method for Vacancy-Rich ZnO: Calcination Effects on Microstructure and Photocatalytic Properties

Tunable Optical and Multiferroic Properties of Zirconium and Dysprosium Substituted Bismuth Ferrite Thin Films

Facile synthesis of pure BiFeO3 and Bi2Fe4O9 nanostructures with enhanced photocatalytic activity

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