Dielectric study of Ti-doped Bi2VO5.5 solid electrolyte

Tripathy, Diptimayee; Saikia, Amarjyoti; Tado, Gyati Tachang; Pandey, Arvind Kumar

doi:10.1007/s12648-018-1356-4

Cited by 10 publications

(3 citation statements)

References 33 publications

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“…Further substitution results in an increase in activation energy and a decrease in the value of ionic conductivity. It is because the dopant cations, ME (Ti/Al), prefer either tetrahedral or octahedral coordination unlike vanadium which can have variable coordination states, due to which in the oxygen environment of vanadate layer ratio of vanadium polyhedral varies with variation of V/ME and reduction of vanadium results in defect trapping [47,48]. Hence, mostly in BIMEVOX system, it has been found that substitution of ME dopants results in enhancement of the conductivity in intermediate temperature range, but not in high-temperature range.…”

Section: Ac Impedance Studiesmentioning

confidence: 99%

Role of Al and Ti doping in modulating electrical properties of BIVOX system

et al. 2019

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The doubly-doped bismuth vanadate with Al and Ti having formula unit, Bi 2 V 1-x Al x/2 Ti x/2 O 5.5-δ (0.10 ≤ x ≤ 0.25) was synthesized. The specimens were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), differential scanning calorimetric (DSC), UV-Vis, and electrochemical impedance spectroscopy (EIS) for their structural, thermal, optical, and electrical studies. Influence of both dopant cations (Al and Ti) was observed in the gradual stabilization of the tetragonal phase of Bi 2 VO 5.5-δ with dopant amount. A non-uniform grain growth phenomenon was observed up to x = 0.175, with dopant addition. UV-Vis study revealed the comparatively higher order of oxide ion vacancies for the composition x = 0.175. Impedance spectroscopy measurements indicate a significant decrease of both the grain (R g ) and grain boundary resistances (R gb ) with the rise in temperature and the overall resistance is found to be dominated by the grain interior contribution. Enhancement of ionic conductivity was found in all the compositions in the intermediate temperature range as compared to the parent compound, and the single Al-doped system and the highest value were obtained for x = 0.175. vanadate, Bi 2 VO 5.5-δ (where δ denotes the oxygen-ion vacancy) surfaced in the late eighties is of immense importance because of its visibly good ionic conductivity values at relatively low temperature viz. 0.2 S·cm -1 at ~600 ℃ [6]. However, the problem with this compound is of multiple phase transitions (i.e., α↔β and β↔γ between 420 and 450 ℃ and between 540 and 560 ℃ , respectively) and the highest conductivity is found in tetragonal polymorph known as γ-polymorph or phase [6,7]. Therefore, stabilization of this phase at room temperature is essential. The 490

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Section: Ac Impedance Studiesmentioning

confidence: 99%

Role of Al and Ti doping in modulating electrical properties of BIVOX system

et al. 2019

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“…Several references are available in the literature concerning the effect of the substitution of vanadium (V 5+ ) by monovalent, divalent, trivalent, tetravalent, and pentavalent cations. BiMeVO x : Me = Cu 2+ , 9,10 Fe 3+ , 9 Zn 2+ , 10 Co 2+ , 11 Ti 4+ , 12 (Cu 2+ , Ti 4+ ), 13 (Cu 2+ , Al 3+ ), 14 (Al 3+ , Ti 4+ ), 15 P 5+ , 16 and (Ti 4+ , Nb 5+ ). 17 The present work is devoted to the structural analysis of Bi 4 V 2 O 11 as well as to the Si( iv ) doped series Bi 4 V 2− x Si x O 11− δ (0.1 ≤ x ≤ 0.4).…”

Section: Introductionmentioning

confidence: 99%

New silicon substituted BiMeVO_x: synthesis and study of structural properties in relation to ionic conductivity

et al. 2023

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“…The V–O bond asymmetric stretching is shown by the peak at 832 cm −1 while the V–O bond symmetric vibration stretching is shown by the peak at 766 and 715 cm −1 53 , 54 . There are peaks visible at 613, and 529 that show the (O–V–O) vanadate anion deformation 55 , 56 .…”

Section: Resultsmentioning

confidence: 99%

Ball-milling synthesized Bi2VO5.5 for piezo-photocatalytic assessment

Kumar

Vaish

Kebaïli

et al. 2023

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The mechanochemical ball milling followed by heating at 650 °C for 5 h successfully produced the single-phase Bi2VO5.5 powder. Catalytic activity for methylene blue dye degradation was investigated. Raman spectroscopy and X-ray diffraction were used to confirm the phase formation. The sample’s charge carrier transportation behavior was ascertained using time-dependent photocurrent analysis. The piezo-photocatalysis experiment yielded a 63% degradation efficiency for the ball-milled Bi2VO5.5 sample. The pseudo-first-order kinetics of the piezo-photocatalytic dye degradation are discerned, and the significant k value of 0.00529 min−1 is achieved. The scavenger test declares the h+ radical is the predominant active species during the piezo-photocatalysis experiment. Vigna radiata seeds were used in a phytotoxicity test to evaluate the germination index. The mechanochemical activation method facilitates reactions by lowering reaction temperature and time. The effect of improved piezo-photocatalytic efficiency on the ball-milled Bi2VO5.5 powder is an unexplored area, and we have attempted to investigate it. Here, ball-milled Bi2VO5.5 powder achieved improved dye degradation performance.

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Dielectric study of Ti-doped Bi2VO5.5 solid electrolyte

Cited by 10 publications

References 33 publications

Role of Al and Ti doping in modulating electrical properties of BIVOX system

Role of Al and Ti doping in modulating electrical properties of BIVOX system

New silicon substituted BiMeVO_x: synthesis and study of structural properties in relation to ionic conductivity

Ball-milling synthesized Bi2VO5.5 for piezo-photocatalytic assessment

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Dielectric study of Ti-doped Bi2VO5.5 solid electrolyte

Cited by 10 publications

References 33 publications

Role of Al and Ti doping in modulating electrical properties of BIVOX system

Role of Al and Ti doping in modulating electrical properties of BIVOX system

New silicon substituted BiMeVOx: synthesis and study of structural properties in relation to ionic conductivity

Ball-milling synthesized Bi2VO5.5 for piezo-photocatalytic assessment

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New silicon substituted BiMeVO_x: synthesis and study of structural properties in relation to ionic conductivity