Impedance Spectroscopy and Electrochemical Properties of Nano-Crystalline Vanadium Pentoxide (V<sub>2</sub>O<sub>5</sub>) Synthesized by Co-Precipitation Method

Rosaiah, P.; Sandhya, G. Lakshmi; Hussain, O. M.

doi:10.1166/asem.2016.1839

Cited by 9 publications

(4 citation statements)

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“…Moreover, the V-O-V bridging bonds asymmetric stretching mode resulting from the shared corner oxygen common to both VO 5 pyramids is displayed 700 cm −1 . The high frequency peak at 995 cm −1 reflects the structural quality of the samples which may be assigned to the stretching mode linked to symmetry vibrations of the terminal vanadium oxygen V=O [61,62,64]. This is in good agreement with the findings of the work obtained by Basu et al [65].…”

Section: Vibrational Propertiessupporting

confidence: 90%

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

et al. 2021

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The proposed work focuses on the effects of growth time and annealing on the physico-chemical performance of vanadium oxides nanostructures (VO-NSs) films synthesized by a novel single reaction microwave synthesis. Thin films of VO-NSs were produced on glass substrates by varying the growth time and annealing temperature. Structural studies revealed that VO-NSs of synthesized films of VO 2 (B) + V 6 O 13 , VO 2 (B), V 3 O 7 and V 2 O 5 were crystallized in the form of monoclinic, monoclinic, tetragonal and orthorhombic structures with predominant orientation along ( 110), ( 110), ( 330) and ( 001) lattice plane, respectively. SEM analysis revealed that the VO-NSs thin films are dense and have uniform morphological characteristics. Furthermore, Raman spectroscopy show that all the samples undergo changes in intensities and peak positions that reflect changes in electronic structure and the vibrational properties. Our results demonstrate that the control of time and annealing treatment has a significant effect on the stoichiometry and the crystallinity leading to the control of the structure, size and morphology of VO-NSs. Moreover, the I-V curves were clearly linear and symmetrical with respect to both axes, with increasing the growth time and annealing treatment are two crucial parameters to improve the electrical conductivity, which influences the electrical properties and affects the behavior of the synthesized nanostructures. This synthesis approach offers a novel and simple route to produce one-dimensional nanostructured metal oxides, which are suitable for a wide range of applications, especially energy storage devices.

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Section: Vibrational Propertiessupporting

confidence: 90%

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

et al. 2021

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“…Furthermore, the peaks identified at wavenumbers 385, 458, and 597 cm –1 relate to the Fe–O vibration mode of Fe 3 O 4 nanoparticles . Also, the existence of two strong peaks at 525 and 693 cm –1 are assigned to the O–V–O bending vibration modes of VO bending, and specific peaks at 298 and 990 cm –1 confirm the presence of VO …”

Section: Resultsmentioning

confidence: 79%

“… 65 Also, the existence of two strong peaks at 525 and 693 cm –1 are assigned to the O–V–O bending vibration modes of V=O bending, and specific peaks at 298 and 990 cm –1 confirm the presence of V=O. 66 …”

Section: Resultsmentioning

confidence: 98%

V₂O₅–Fe₃O₄/rGO Ternary Nanocomposite with Dual Applications as a Dye Degradation Photocatalyst and OER Electrocatalyst

Jafari,

Rahsepar

2023

ACS Omega

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The design and synthesis of structured nanomaterials with dual properties have always been highly attractive in various fields, especially in the reduction of environmental pollution as well as the generation of renewable energy. In this study, the synthesized ternary V 2 O 5 –Fe 3 O 4 /rGO nanocomposite was investigated to evaluate both the photocatalytic and electrocatalytic activities for the removal of methylene blue (MB) dye under UV/visible light radiation and oxygen evolution reaction (OER), respectively. The magnetized V 2 O 5 –Fe 3 O 4 /rGO nanocomposite is characterized by TEM, FE-SEM (with coupling by elemental mapping), EDS, XRD, FTIR, Raman, PL, DRS, and UV–vis analyses. The obtained results show that the graphene oxide substrate is decorated very well using Fe 3 O 4 and V 2 O 5 nanoparticles and converted to reduced graphene oxide (rGO). Furthermore, the V 2 O 5 –Fe 3 O 4 /rGO nanocomposite is considered as an active catalyst material to modify the commercial glassy carbon electrode for OER using linear sweep voltammetry (LSV). The photocatalytic activity of this novel nanocomposite revealed 89.2% ( k obs = 1.7 × 10 –2 min –1 ) and 76% ( k obs = 8.3 × 10 –3 min –1 ) degradation efficiencies of MB dye under UV and visible light irradiation at room temperature, respectively, and the surface area of the V 2 O 5 –Fe 3 O 4 /rGO nanocomposite was examined to be 705.8 cm 2 /g by N 2 adsorption–desorption isotherms. In addition, electrochemical measurements determined the best OER performance of the ternary nanocomposite with the lowest overpotential (458 mV) and Tafel slope (132 mV dec –1 ) compared to the rGO substrate, Fe 3 O 4, V 2 O 5 nanoparticles, and binary nanocomposites. This work shows much enhancements in both photocatalytic and electrocatalytic activities due to the synergistic effect of the decorated GO support with V 2 O 5 and Fe 3 O 4 nanoparticles.

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“…The Raman spectrum of CuO, shown in Figure , exhibits a dominant peak at ∼300 cm –1 , corresponding to the bending vibrations of the Cu–O–Cu in the crystal structure . Further, a small peak observed around 645 cm –1 can be assigned to the symmetric and asymmetric stretching vibrations of the Cu–O bond in the crystal lattice. , For V 2 O 5 , a prominent Raman peak is observed at ∼150 cm –1 along with other minor peaks in the range of 100–300 cm –1 , corresponding to bending vibrations of V–O in the lattices . Multiple peaks observed in the range of 400–700 cm –1 can be assigned to modes such as V–O–V bending vibrations, V–O stretching combined with V–O–V bending, and lattice vibrations in the system .…”

Section: Results and Discussionmentioning

confidence: 96%

CuO–V₂O₅ Composite vs Single-Phase Cu₂V₂O₇: Understanding the Synergy of Mixed-Metal Oxides in Customizing Their Properties for Improved Hydrogen Evolution Reaction

Jayaraj,

Panneerselvam,

Antony

et al. 2024

Energy Fuels

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Impedance Spectroscopy and Electrochemical Properties of Nano-Crystalline Vanadium Pentoxide (V₂O₅) Synthesized by Co-Precipitation Method

Cited by 9 publications

References 0 publications

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

V₂O₅–Fe₃O₄/rGO Ternary Nanocomposite with Dual Applications as a Dye Degradation Photocatalyst and OER Electrocatalyst

CuO–V₂O₅ Composite vs Single-Phase Cu₂V₂O₇: Understanding the Synergy of Mixed-Metal Oxides in Customizing Their Properties for Improved Hydrogen Evolution Reaction

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Impedance Spectroscopy and Electrochemical Properties of Nano-Crystalline Vanadium Pentoxide (V2O5) Synthesized by Co-Precipitation Method

Cited by 9 publications

References 0 publications

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

Microwave assisted growth of highly oriented vanadium oxides nanostructures: structural, vibrational and electrical properties

V2O5–Fe3O4/rGO Ternary Nanocomposite with Dual Applications as a Dye Degradation Photocatalyst and OER Electrocatalyst

CuO–V2O5 Composite vs Single-Phase Cu2V2O7: Understanding the Synergy of Mixed-Metal Oxides in Customizing Their Properties for Improved Hydrogen Evolution Reaction

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Impedance Spectroscopy and Electrochemical Properties of Nano-Crystalline Vanadium Pentoxide (V₂O₅) Synthesized by Co-Precipitation Method

V₂O₅–Fe₃O₄/rGO Ternary Nanocomposite with Dual Applications as a Dye Degradation Photocatalyst and OER Electrocatalyst

CuO–V₂O₅ Composite vs Single-Phase Cu₂V₂O₇: Understanding the Synergy of Mixed-Metal Oxides in Customizing Their Properties for Improved Hydrogen Evolution Reaction