Electrochemical supercapacitive performance study of spray pyrolyzed cobalt oxide film

Jadhav, C. H.; Pisal, Komal B.; Chavan, Apparao R.; Patil, Sandip K.; Patil, Prasad; Pagare, Pavan K.

doi:10.1016/j.matpr.2020.06.477

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…The energy gap

is an important parameter which identifies the optical characteristics and the type of electron transition. The energy gap of the fabricated thin film was estimated from Tauc’s formula, defined as [ 30 ]:

where, h

is the incident optical energy, A is the optical absorbance, and

is the optical absorption coefficient expressed as [ 32 , 33 ]:

t is the thickness of the film. The

of Co 3 O 4 was evaluated by extending the straight line part of

curve on the Y-axis to the energy on X-axis at

( Figure 5 b) exhibiting allowed direct transitions at 2.92 and 3.08 eV.…”

Section: Resultsmentioning

confidence: 99%

“…The

of Co 3 O 4 was evaluated by extending the straight line part of

curve on the Y-axis to the energy on X-axis at

( Figure 5 b) exhibiting allowed direct transitions at 2.92 and 3.08 eV. The photon energy greater than the band gap means that more electrons transfer from to the conduction band and increase of free charge carriers [ 32 , 33 ].…”

Section: Resultsmentioning

confidence: 99%

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Comparative Study of Larvicidal Activity of Spinel Co3O4 Nanorods and Entomopathogenic Metarhizium brunneum Conidia against Culex pipiens

et al. 2022

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Herein, we report the synthesis of spinel cobalt oxide nanorods (Co3O4 NRs) by a modified co-precipitation approach and examine their larvicidal activity against Culex pipiens. The structure and morphology of the as-prepared Co3O4 NRs were emphasized using X-ray diffraction (XRD), Raman spectroscopy, energy dispersive X-ray spectroscopy (EDAX), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). It was found that Co3O4 nanostructures have a face-centered spinel cubic crystal structure with a mean crystallite size of 38 nm. These nanostructures have a rod like shape with a mean diameter of 30 nm and an average length of 60 nm. The TGA measurements revealed the high stability of the formed spinel cubic structure at 400 °C. The optical behavior indicates the direct transition of electrons through an optical band gap in the range of 2.92 eV–3.08 eV. These unique chemical and physical properties of Co3O4 NRs enabled them to be employed as a strong agent for killing the C. pipiens. A comparison study was employed between the as-prepared Co3O4 and the entomopathogenic fungus Metarhizium brunneum as a control agent of C. pipiens larvae. The results revealed that the as-prepared nanorods have higher mortality against C. pipiens larvae compared with the well-known M. brunneum.

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“…The energy gap

where, h

is the incident optical energy, A is the optical absorbance, and

is the optical absorption coefficient expressed as [ 32 , 33 ]:

t is the thickness of the film. The

of Co 3 O 4 was evaluated by extending the straight line part of

curve on the Y-axis to the energy on X-axis at

( Figure 5 b) exhibiting allowed direct transitions at 2.92 and 3.08 eV.…”

Section: Resultsmentioning

confidence: 99%

“…The

of Co 3 O 4 was evaluated by extending the straight line part of

curve on the Y-axis to the energy on X-axis at

Section: Resultsmentioning

confidence: 99%

Comparative Study of Larvicidal Activity of Spinel Co3O4 Nanorods and Entomopathogenic Metarhizium brunneum Conidia against Culex pipiens

et al. 2022

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“…Figure shows the variation of absorbance of ZnFe 2 O 4 with wavelength, the absorption spectrum displays more absorption of light in the visible region. The optical data is analyzed to estimate the value of optical band gap energy of the ZnFe 2 O 4 using the Tauc relation [ 33 ]

(α h υ) = A {((), h υ - E_{g})}^{n}

where A is the constant, E g the band gap energy, hν the incident photon energy, and n = ½ or 2 for direct or indirect transition, respectively. The recorded data was further used to calculate the band gap energy of the ZnFe 2 O 4 .…”

Section: Resultsmentioning

confidence: 99%

Preparation of Zinc Ferrite by Solid State Method and Its Characterizations

Jadhav

Salunke

Jadhav

et al. 2021

Macromolecular Symposia

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The zinc ferrite nanoparticles are synthesized by a simple and low cost solid state technique. The synthesized powder is pre‐sintered at 200°C for 5 h and annealing at different temperatures. The crystal structure, phase purity, optical, and morphological analysis studies of synthesized ferrites materiel are investigated by X‐ray diffraction (XRD), scanning electron microscopic (SEM), UV–Visible spectroscopy, and Fourier transform infrared (FTIR) spectroscopic techniques, respectively. The XRD pattern of all zinc ferrite samples shows the formation of single‐phase cubic spinel structure. The optical band gap of zinc ferrite is found to be 1.96 eV. The change in morphology of zinc ferrite is observed due to the effect of the annealing temperature.

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“…The band gap was observed to be 1.5 eV for Co 3 O 4 in Figure 5a which is well in agreement for the values reported for chemically synthesized Co 3 O 4. 28,32 For PoPD, E g was obtained at 1.9 eV which is shown in Figure 5b. This value also coincides with that reported for conventionally synthesized PoPD.…”

Section: Instrumentationsmentioning

confidence: 99%

“…The peak intensity at 1147 cm À1 indicates the C-H in-plane bending vibration of aromatic benzene with the phenazine skeleton. 39 For PoPD spectra the N-H stretching vibrations of the -NH-and -NH 2 groups are ascribed by the peaks at 3373 and 3192 cm À1 , respectively. While the peaks at 1368 and 1236 cm À1 are attributed to the C-N stretching vibrations in the quinoid and benzoid imine units and two peaks centered at 1623 and 1529 cm À1 are attributed to the C=C stretching vibrations of quinoid and benzenoid rings.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Electrochemical performances and antibacterial activity of green synthesized cobalt oxide nanoparticles and poly (o‐Phenylenediamine) based textile supercapacitor

Sam,

Chakraborty,

Selvan

et al. 2024

J of Applied Polymer Sci

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The demands for electric automotive and regenerative energy storage applications in various fields have brought the attention of researchers towards supercapacitors due to their high specific power, long cycle life, and their ability to bridge the power/energy gap between conventional capacitors and batteries/fuel cells. The incorporation of metal oxide nanoparticles into the functionalized polymer matrix enhances the efficiency of supercapacitor. UV, FT‐IR, TGA, XRD, and SEM analyses validates the incorporation of metal oxide into the polymer matrix to form polymer nanocomposite. A specific capacitance of 186.4 Fg−1 was observed for PoPD‐1 nanocomposite‐based device at a charge density of 1 A/g. The bare polymer and the nanocomposite also exhibited good antimicrobial efficacy and can be used as textiles for therapeutic applications.

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Electrochemical supercapacitive performance study of spray pyrolyzed cobalt oxide film

Cited by 11 publications

References 25 publications

Comparative Study of Larvicidal Activity of Spinel Co3O4 Nanorods and Entomopathogenic Metarhizium brunneum Conidia against Culex pipiens

Comparative Study of Larvicidal Activity of Spinel Co3O4 Nanorods and Entomopathogenic Metarhizium brunneum Conidia against Culex pipiens

Preparation of Zinc Ferrite by Solid State Method and Its Characterizations

Electrochemical performances and antibacterial activity of green synthesized cobalt oxide nanoparticles and poly (o‐Phenylenediamine) based textile supercapacitor

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