Effect of doping on optical properties in BiMn1−x (TE) x O3 (where x = 0.0, 0.1 and TE = Cr, Fe, Co, Zn) nanoparticles synthesized by microwave and sol-gel methods

Bhardwaj, Neha; Gaur, Anurag; Yadav, K. L.

doi:10.1007/s00339-017-1042-y

Cited by 25 publications

(4 citation statements)

References 27 publications

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“…For our synthesized pristine STO sample, only one broad peak can be observed at 554 cm −1 , which can be attributed to Ti-O stretching vibration. With an increasing amount of BMO, the peak center gradually shifts to higher wavenumbers and reaches 622 cm −1 for the 0.5STO-0.5BMO According to previous studies, the FT-IR spectrum of phase-pure BMO has two sharp peaks attributed to Mn-O stretching vibrations at 827 and 722 cm −1 [39]. The observed peak shift is the result of the superposition effect of Mn-O and Ti-O bond lengths.…”

Section: Resultsmentioning

confidence: 66%

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

Karoblis

Diliautas

Raudonytė-Svirbutavičienė

et al. 2020

Crystals

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In this study, the aqueous sol-gel method was employed for the synthesis of (1−x)SrTiO3-xBiMnO3 solid solutions. Powder X-ray diffraction analysis confirmed the formation of single-phase perovskites with a cubic structure up to x = 0.3. A further increase of the BiMnO3 content led to the formation of a negligible amount of neighboring Mn3O4 impurity, along with the major perovskite phase. Infrared (FT-IR) analysis of the synthesized specimens showed gradual spectral change associated with the superposition effect of Mn-O and Ti-O bond lengths. By introducing BiMnO3 into the SrTiO3 crystal structure, the size of the grains increased drastically, which was confirmed by means of scanning electron microscopy. Magnetization studies revealed that all solid solutions containing the BiMnO3 component can be characterized as paramagnetic materials. It was observed that magnetization values clearly correlate with the chemical composition of powders, and the gradual increase of the BiMnO3 content resulted in noticeably higher magnetization values.

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Section: Resultsmentioning

confidence: 66%

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

Karoblis

Diliautas

Raudonytė-Svirbutavičienė

et al. 2020

Crystals

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“…reported a bandgap of 0.9(5) eV for BiMnO 3 ; however, this value should be interpreted with caution, as in the same investigation, the bandgap of BiFeO 3 was reported as 0.9 eV, when literature's widely accepted value is ∼2.7 eV 19–21 . Bhardwaj et al 22 . prepared BiMnO 3 by sol–gel and reported a bandgap of 1.25 eV.…”

Section: Introductionmentioning

confidence: 83%

“…Based on X-ray emission and absorption spectra, McLeod et al 18 reported a bandgap of 0.9(5) eV for BiMnO 3 ; however, this value should be interpreted with caution, as in the same investigation, the bandgap of BiFeO 3 was reported as 0.9 eV, when literature's widely accepted value is ∼2.7 eV. [19][20][21] Bhardwaj et al 22 prepared BiMnO 3 by solgel and reported a bandgap of 1.25 eV. Xu et al 23 reported a bandgap of 1.1 eV for epitaxial thin films fabricated from BiMnO 3 .…”

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confidence: 99%

Crystal structure, dielectric properties, and optical bandgap control in KNbO₃–BiMnO₃ ceramics

et al. 2022

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1 − x)KNbO 3 -xBiMnO 3 (0 ≤ x ≤ 0.25) ceramics were prepared by the solid-state reaction method. An X-ray diffraction analysis combined with Raman spectroscopy showed the co-solubility of Bi and Mn in the orthorhombic structure to be less than 5% BiMnO 3 . Orthorhombic and pseudocubic symmetries coexist in the 0.05 ≤ x ≤ 0.15 region, coinciding with a bimodal grain size distribution. This coexistence of crystal symmetries is further corroborated by several anomalies in the dielectric behavior, which can be ascribed to structural phase transitions. For x ≥ 0.20, only one dielectric anomaly is detected around 100 • C, which is commensurate with in situ Raman spectroscopy analysis. This work also shows that Bi/Mn co-doping can be employed to tailor the bandgap of KNbO 3, which narrows continuously with increasing x, resulting in ∼1-eV narrowing for singlephase x = 0.25. This may offer the possibility to employ this ferroic material in photoresponsive technologies.

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“…The porosity values of CoNPs and PtNPs were calculated using Eq. ( 6), a quantitative analysis on porosity based on refractive index [37].…”

Section: Tem Anaylsis Of Ptnps and Conpsmentioning

confidence: 99%

Effect of Plasma Liquid on Colloidal (CoNPs) and (PtNPs) Nanostructures Produced by Laser Ablation Technique for Antibacterial Applications

Khamees,

Al-Rubaye,

Gençyılmaz

et al. 2023

Int. J. Nanosci.

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In this work, the biological and physical properties of colloidal platinum nanoparticles (PtNPs) and cobalt nanoparticles (CoNPs) were examined for antibacterial applications. The colloidal PtNPs and CoNPs were produced using two different liquids (double-distilled water (DDW) and Dulbecco’s Modified Eagle’s Medium (DMEM)) by laser ablation technique (PLAL). Characterization techniques such as transmission electron microscopy (TEM), UV–Vis spectroscopy and Fourier transform infrared (FTIR) were used to determine some physical properties of PtNPs and CoNPs. The antibacterial effects of colloidal PtNPs and CoNPs at different doses on various bacteria were investigated and their antibacterial activity resistances were calculated by measuring the inhibition zone widths. The effect of the liquid used in the production, the type of bacteria and dose amounts on the antibacterial resistance of these nanoparticles (NPs) were determined. In this study, it has been shown that the liquid used in the production of PtNPs and CoNPs can create significant changes in the physical and antibacterial properties of NP, especially by changing the size and concentration of colloidal PtNPs.

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Effect of doping on optical properties in BiMn1−x (TE) x O3 (where x = 0.0, 0.1 and TE = Cr, Fe, Co, Zn) nanoparticles synthesized by microwave and sol-gel methods

Cited by 25 publications

References 27 publications

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

Crystal structure, dielectric properties, and optical bandgap control in KNbO₃–BiMnO₃ ceramics

Effect of Plasma Liquid on Colloidal (CoNPs) and (PtNPs) Nanostructures Produced by Laser Ablation Technique for Antibacterial Applications

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Effect of doping on optical properties in BiMn1−x (TE) x O3 (where x = 0.0, 0.1 and TE = Cr, Fe, Co, Zn) nanoparticles synthesized by microwave and sol-gel methods

Cited by 25 publications

References 27 publications

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

Crystal structure, dielectric properties, and optical bandgap control in KNbO3–BiMnO3 ceramics

Effect of Plasma Liquid on Colloidal (CoNPs) and (PtNPs) Nanostructures Produced by Laser Ablation Technique for Antibacterial Applications

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Crystal structure, dielectric properties, and optical bandgap control in KNbO₃–BiMnO₃ ceramics