Structural, dielectric, magnetic, and ferroelectric properties of bismuth ferrite (BiFeO3) synthesized by a solvothermal process using hexamethylenetetramine (HMTA) as precipitating agent

Banoth, Pravallika; Sohan, Arya; Kandula, Chinna; Kollu, Pratap

doi:10.1016/j.ceramint.2022.07.208

Cited by 14 publications

(4 citation statements)

References 47 publications

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“…Furthermore, Raman spectroscopy is measured to characterize the structure of BTFM-CTO-NBT films, which support nine Raman-activated modes of the films. The A mode of films is mainly dependent on the vibration of the Bi–O bond in the low-frequency region, and the E mode is related to the vibration of the Fe–O bond predominantly within the high-frequency region, as shown in Figure S1c. It can be seen that the E mode of films has disappeared, and all of the modes have a left or right shift, as shown in Figure d, which indicates that NBT doping can influence the Bi–O and Fe–O bonds.…”

Section: Resultsmentioning

confidence: 98%

0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

Changxing

Liang

Junxi

et al. 2023

ACS Appl. Nano Mater.

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The high-quality (0.78-x)BiTi0.1Fe0.8Mg0.1O3-0.22CaTiO3-(x)Na0.5Bi0.5TiO3 nanoscale-thick thin films were prepared successfully on the Pt/Ti/SiO2/Si substrate via the sol–gel method. The influence of Na0.5Bi0.5TiO3 doping on the structure, topography, piezoelectricity, ferroelectricity, and dielectricity of BTFM-CTO-NBT thin films was investigated systematically. The X-ray diffraction and Raman results manifested that NBT doping induced the formation of the tetragonal phase, which existed between the rhombohedral and orthorhombic phases, and the elemental mappings revealed that the distribution of each element was uniform simultaneously. X-ray photoelectron spectroscopy analysis showed that NBT doping could effectively restrain the reduction of Fe3+, thereby reducing the oxygen vacancy concentration. The film had a minimum leakage current of about 3.19 × 10–10 A/cm2, a higher piezoelectric response, a maximum remnant polarization (2P r = 174.64 μC/cm2), and a relatively smaller coercive field (E c = 359.90 kV/cm) as x = 0.05. At the same time, the corresponding film had a maximum dielectric constant (469.6) and a minimum dielectric loss (0.063) at 1 kHz. These insights offer an alternative pathway to enhance the properties of BTFM-CTO thin films.

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Section: Resultsmentioning

confidence: 98%

0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

Changxing

Liang

Junxi

et al. 2023

ACS Appl. Nano Mater.

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“…Furthermore, BFO nanoparticles (NPs) with an average size of ~12 nm synthesized through the sol–gel method, were reported with a dielectric constant and a remanent polarization of ~84.53 (RT/10 2 Hz) and ~8.2 µC·cm −2 , respectively [ 85 ]. Solvothermal techniques, using hexa-methylenetetramine as a precipitating agent with different concentrations, were employed to synthesize nanometric BFO powder with a very high dielectric constant value of ~4000 (RT/10 2 Hz) and a high remanent polarization of ~6.65 µC·cm −2 [ 86 ].…”

Section: Bismuth Ferritementioning

confidence: 99%

Recent Advances toward Enhanced Photocatalytic Proprieties of BiFeO3-Based Materials

Nassereddine,

Benyoussef,

Asbani

et al. 2023

Nanomaterials

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Owing to their remarkable success in photocatalytic applications, multiferroic BiFeO3 and its derivatives have gained a highly promising position as electrode materials for future developments of efficient catalysts. In addition to their appropriate band gaps, these materials exhibit inherent intrinsic polarizations enabling efficient charge carrier separation and their high mobility without the need for additional co-catalysts. Here, we review the existing strategies for enhancing the photocatalytic performances of BiFeO3-based materials and we describe the physico-chemical properties at the origin of their exceptional photocatalytic behavior. A special focus is paid to the degradation of organic pollutants and water splitting, both driven through photocatalysis to unveil the correlation between BiFeO3 size, substitution, and doping on the one hand and the photocatalytic performances on the other hand. Finally, we provide practical recommendations for future developments of high-performing BiFeO3-based electrodes.

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“…A stable, non-toxic, and multiferroic visible light active photocatalyst has recently been explored to exist in the form of BiFeO 3 (BFO). BFO has a band gap from 2.2 to 2.7 eV, which indicates that it strongly absorbs light in the visible range from 200 to 800 nm. , Excellent characteristics of BFO have been seen in the degradation of pollutants. However, the main problem with the significant photogenerated electron–hole pairs recombination rate is still restricting the use of BFO for photocatalysis.…”

Section: Introductionmentioning

confidence: 99%

BiFeO₃-Black TiO₂ Composite as a Visible Light Active Photocatalyst for the Degradation of Methylene Blue

Banoth,

Kandula,

Lavudya

et al. 2023

ACS Omega

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The application of a novel BiFeO3 (BFO)-black TiO2 (BTO) composite (called BFOT) as a photocatalyst for the degradation of methylene blue is reported. The p–n heterojunction photocatalyst was synthesized for the first time through microwave-assisted co-precipitation synthesis to change the molar ratio of BTO in BiFeO3 to increase the photocatalytic efficiency of the BiFeO3 photocatalyst. The UV–visible properties of p–n heterostructures showed excellent absorption of visible light and reduced electron–hole recombination properties compared to the pure-phase BFO. Photocatalytic studies on BFOT10, BFOT20, and BFOT30 have shown that they decompose methylene blue (MB) in sunlight better than pure-phase BFO in 70 min. The BFOT30 photocatalyst was the most effective at reducing MB when exposed to visible light (97%). Magnetic studies have shown that BTO is diamagnetic, and the BFOT10 photocatalyst exhibits a very weak antiferromagnetic behavior, whereas BFOT20 and BFO30 show diamagnetic behavior. This study confirms that the catalyst has poor stability and weak magnetic recovery properties due to the non-magnetic phase BTO in the BFO.

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Structural, dielectric, magnetic, and ferroelectric properties of bismuth ferrite (BiFeO3) synthesized by a solvothermal process using hexamethylenetetramine (HMTA) as precipitating agent

Cited by 14 publications

References 47 publications

0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

Recent Advances toward Enhanced Photocatalytic Proprieties of BiFeO3-Based Materials

BiFeO₃-Black TiO₂ Composite as a Visible Light Active Photocatalyst for the Degradation of Methylene Blue

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Structural, dielectric, magnetic, and ferroelectric properties of bismuth ferrite (BiFeO3) synthesized by a solvothermal process using hexamethylenetetramine (HMTA) as precipitating agent

Cited by 14 publications

References 47 publications

0.78BiTi0.1Fe0.8Mg0.1O3-0.22CaTiO3 Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

0.78BiTi0.1Fe0.8Mg0.1O3-0.22CaTiO3 Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

Recent Advances toward Enhanced Photocatalytic Proprieties of BiFeO3-Based Materials

BiFeO3-Black TiO2 Composite as a Visible Light Active Photocatalyst for the Degradation of Methylene Blue

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Product

Resources

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0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

0.78BiTi_0.1Fe_0.8Mg_0.1O₃-0.22CaTiO₃ Nanoscale-Thick Thin Films for Doping-Enhanced Electric Applications

BiFeO₃-Black TiO₂ Composite as a Visible Light Active Photocatalyst for the Degradation of Methylene Blue