Spectroscopic, thermal, structural and electrical studies on VO2+ ions doped PVA/MAA:EA polymer blend films

Ojha, Pravakar; Siddaiah, T.; Ramacharyulu, P. V. R. K.; Gopal, N.O.; Ramu, Ch.; Nagabhushana, H.

doi:10.1016/j.jsamd.2019.03.004

Cited by 8 publications

(6 citation statements)

References 41 publications

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“…The structural, optical, electrical conductivity, and dielectric characteristics of polymer blends can be altered by adding suitable dopants, which are selected based on their reactivity with the host matrix 9 …”

Section: Introductionmentioning

confidence: 99%

“…8 The structural, optical, electrical conductivity, and dielectric characteristics of polymer blends can be altered by adding suitable dopants, which are selected based on their reactivity with the host matrix. 9 Nanostructured ceramic materials have been given great attention because of its potential uses in highdensity information storage and electronic devices. Molybdenum trioxide (MoO 3 ) is a transition metal oxide that is n-type and has a band gap of 3.15 eV.…”

Section: Introductionmentioning

confidence: 99%

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Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Al‐Muntaser

Alsaidi

Sharma

et al. 2022

Intl J of Energy Research

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Nanocomposite films of PVP/PEO containing MoO 3 nanoplates were prepared using a casting procedure. XRD results showed that the addition of MoO 3 in the virgin PVP/PEO blend increases the amorphous domains of polymer nanocomposite (PNC) films. The DFT/FT-IR results have established the miscibility and the interaction between PVP and PEO polymers via hydrogen bonds. Also, FTIR studies showed a coordination interaction between MoO 3 nanoplates and the C=O group of PVP and/or the C-O-C group of PEO of the PVP/PEO blend. The optical band gap values of PNC films of PVP/PEO/MoO 3 decreased with increasing MoO 3 content. The relaxation processes and dielectric dispersion of the prepared PNC films were examined and discussed. The electrical conductivity was enhanced via the addition of MoO 3 nanoplates because of an increase in the number density of the charge carriers. The dominated conduction mechanism of PNC films reveals the correlated barrier hopping model, while the type of relaxation process follows the non-Debye one.These observations illustrate the applicability and potential uses of these PNC films as a nanodielectric material in ceramic capacitors and electrochemical applications such as devices of energy storage and separators in batteries.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Al‐Muntaser

Alsaidi

Sharma

et al. 2022

Intl J of Energy Research

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“…The ionic dynamics in polymeric materials were examined using dielectric analysis. Studying the dielectric constant of polymer nanocomposites is crucial because it gives an indication of the amount of charge stored by the material 45 . It may be utilized to establish that an increase in the quantity of free mobile ions and/or charge carriers caused the conductivity to rise.…”

Section: Resultsmentioning

confidence: 99%

Reinforcement of structural, optical, electrical, and dielectric characteristics of CMC / PVA based on GNP / ZnO hybrid nanofiller: Nanocomposites materials for energy‐storage applications

Al‐Muntaser

Pashameah

Sharma

et al. 2022

Intl J of Energy Research

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Summary Polymer hybrid nanocomposites films of carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA)/graphene nanoplatelets (GNP) incorporated with varying concentrations of nano‐zinc oxide (ZnO) were fabricated using the solution casting method. The effect of the GNP/ZnO hybrid nanofiller on structural, optical, and conductive characteristics of the pristine CMC/PVA polymer was studied and discussed. The X‐ray diffraction findings reveal that the crystallinity of the nanocomposites films decreases with increasing GNP/ZnO‐NPs content. Fourier transform infrared spectra indicate the interaction between CMC/PVA polymer chains and GNP/ZnO nanohybrid. The optical absorption spectrum demonstrates that the energy gap decreases as the amount of GNP/ZnO nanofiller increases. In the dielectric characteristics, space charge polarization was shown by the high values of ε' at low frequencies, whereas, higher values of ε″ were associated with an increase in energy loss in the composite films. The increasing conductivity with frequency was described in the light of hopping and Koop's theory. After loading the GNP/ZnO‐NPs, the conductivity increased due to an enhancement in the charge carriers. The correlated barrier hopping model was shown to be the conduction mechanism that dominates nanocomposite films with the non‐Debye relaxation process. These outcomes demonstrate the suitability of these nanocomposites for various applications including flexible capacitors, separators in batteries, and energy storage devices.

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“…The tan is defined as the ratio between energy loss and energy stored [49]. The changes in tangent loss are obtained as [50]:…”

Section: Dielectric Propertiesmentioning

confidence: 99%

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped with PVA/CMC blend as an application in organoelectronic devices

Atta

Alsulami

Asnag

et al. 2021

J Mater Sci: Mater Electron

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Stevia rebaudiana plant leaves were used for biosynthesis of gold nanoparticles (AuNPs). Transmission electron microscope (TEM) images showed various shapes and sizes of AuNPs. Various amounts of AuNPs were added to polyvinyl alcohol/carboxymethylcellulose (PVA/CMC, 40/60) via the casting method. The X-ray diffraction (XRD) spectrum of pure blend shows the amorphous nature of the blend. FT-IR spectra showed the interaction between PVA/CMC and AuNPs. The ultra-violet and visible (UV/VIS.) spectra showed emerge new peak of surface plasmon resonance (SPR) of AuNPs for the filled samples. SEM images showed bright spots on the sample's surface, which was attributed to AuNPs. AC conductivity exhibited enhancement after the addition of gold nanoparticles. The ε′ and ε″ were reduced with increasing the frequency due to direction dipoles of applied electric field. Because of the mobile charges inside the polymeric backbone, higher values of ε′ and ε″ were observed at low frequencies. The tanδ showed increased with an increase in AuNPs concentration and at the decrease the frequency, as expected.

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Spectroscopic, thermal, structural and electrical studies on VO2+ ions doped PVA/MAA:EA polymer blend films

Cited by 8 publications

References 41 publications

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Reinforcement of structural, optical, electrical, and dielectric characteristics of CMC / PVA based on GNP / ZnO hybrid nanofiller: Nanocomposites materials for energy‐storage applications

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped with PVA/CMC blend as an application in organoelectronic devices

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Spectroscopic, thermal, structural and electrical studies on VO2+ ions doped PVA/MAA:EA polymer blend films

Cited by 8 publications

References 41 publications

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO3nanoplates for flexible energy‐storage devices

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO3nanoplates for flexible energy‐storage devices

Reinforcement of structural, optical, electrical, and dielectric characteristics of CMC / PVA based on GNP / ZnO hybrid nanofiller: Nanocomposites materials for energy‐storage applications

Enhanced optical, morphological, dielectric, and conductivity properties of gold nanoparticles doped with PVA/CMC blend as an application in organoelectronic devices

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Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices

Structural, optical, electrical, andDFTstudies on polyvinyl pyrrolidone/polyethylene oxide polymer blend filled withMoO₃nanoplates for flexible energy‐storage devices