Lower Cost and Higher UV-Absorption of Polyvinyl Alcohol/ Silica Nanocomposites For Potential Applications

Hashim, Ahmed; Hamad, Zinah Sattar

doi:10.21608/ejchem.2019.7264.1593

Cited by 73 publications

(33 citation statements)

References 26 publications

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“…Figures 7 and 8 show the energy band gap of nanocomposites. From the values of the absorption coefficient, it can be concluded that the nanocomposites have indirect energy band gap, it is decrease with increasing the ZnCoFe 2 O 4 nanoparticles, this behavior is due to the creation of levels in the energy gap [22][23][24][25].…”

Section: Resultsmentioning

confidence: 99%

Structural, Optical and Dielectric Properties of (PS- In2O3/ ZnCoFe2O4) Nanocomposites

Hayder

Habeeb

Hashim³

2019

Egypt. J. Chem.

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The (PS-In 2 O 3 / ZnCoFe 2 O 4 ) nanocomposites have been prepared by using solution casting method. The structural, optical and dielectric properties of (PS-In 2 O 3 / ZnCoFe 2 O 4 ) nanocomposites have been studied to use it for different optoelectronics applications. The structural properties include FTIR, optical microscope and SEM. The results of optical properties for (PS-In 2 O 3 / ZnCoFe 2 O 4 ) nanocomposites showed that the absorbance, absorption coefficient, refractive index, extinction coefficient, dielectric constants and optical conductivity of (PS-In 2 O 3 ) nanocomposites were increased with the increase in ZnCoFe 2 O 4 nanoparticles concentrations while the transmittance and energy band gap were decreased with the increase of the ZnCoFe 2 O 4 nanoparticles concentrations. The(PS-In 2 O 3 / ZnCoFe 2 O 4 ) nanocomposites have high absorbance in the UV-region. The results of dielectric properties showed that the dielectric constant, dielectric loss and A.C electrical conductivity of (PS-In 2 O 3 ) nanocomposites increase with increase in ZnCoFe 2 O 4 nanoparticles concentrations. The dielectric constant and dielectric loss decrease while the electrical conductivity increases with an increase in frequency.

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Section: Resultsmentioning

confidence: 99%

Structural, Optical and Dielectric Properties of (PS- In2O3/ ZnCoFe2O4) Nanocomposites

Hayder

Habeeb

Hashim³

2019

Egypt. J. Chem.

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“…The optical conductivity of blend rises with the increase in MnO2 NPs ratio and photon energy. The rise in optical conductivity as MnO2 NPs ratio increase due to reduce the energy gap [27][28]. [29,30].…”

Section: A D C Bmentioning

confidence: 99%

Influence of MnO2 Nanoparticles Addition on Structural, Optical and Dielectric Characteristics of PVA/PVP for Pressure Sensors

Algidsawi¹,

Hashim

Hadi

et al. 2022

Phys. Chem. Solid St.

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Films of PVA/PVP/MnO2 nanostructures were fabricated for pressure sensors fields with lightweight, flexible and low cost compare with other sensors. The structure, dielectric and optical characteristics of PVA/PVP/MnO2 nanostructures have been studied. The results showed that the dielectric constant, dielectric loss and A.C electrical conductivity of PVA/PVP blend are enhanced with the increase in MnO2 NPs content. The dielectric constant and dielectric loss decrease while the A.C electrical conductivity increases with the increase in frequency. The optical characteristics of PVA/PVP/MnO2 nanostructures showed that the absorbance was rise with increasing of the MnO2 NPs content. The indirect energy gap of PVA/PVP blend was reduced with increase in MnO2 NPs content. The optical constants of blend are changed with the increase in MnO2 NPs content. The pressure sensor application results of PVA/PVP/MnO2 nanostructures showed that the electrical capacitance (Cp) increases with the rise in applied pressure.

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“…Absorptio band gap of PEO decreases with adding of NiO, this behavior due to increase of the localized level in energy gap [22][23][24][25][26][27][28][29][30], which make it suitable in many optoelectronics applications.…”

Section: Wavelength(nm)mentioning

confidence: 99%

Augmented the Structure, Electronic and Optical Characteristics of PEO Doped NiO for Electronics Applications

Hassan

Abduljalil

Hashim

2021

Phys. Chem. Solid St.

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This paper aims to investigate the structural, optical and electrical properties of PEO doped with NiO. The DFT calculations have been performed using Gaussian 09 package of programs. The calculated electronic properties included the total energy, HOMO and LUMO energies, energy gap, ionization energy, electron affinity, electronegativity, electrochemical hardness, electronic softness and electrophilic index. The obtained results showed that the doping PEO with NiO improved the structural, optical, electronic and electrical characteristics where the energy band gap decreases about 67.4% with addition of NiO which make the (PEO-NiO) composites are promising materials for flexible optoelectronics fields in the development of electronics applications.

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Lower Cost and Higher UV-Absorption of Polyvinyl Alcohol/ Silica Nanocomposites For Potential Applications

Cited by 73 publications

References 26 publications

Structural, Optical and Dielectric Properties of (PS- In2O3/ ZnCoFe2O4) Nanocomposites

Structural, Optical and Dielectric Properties of (PS- In2O3/ ZnCoFe2O4) Nanocomposites

Influence of MnO2 Nanoparticles Addition on Structural, Optical and Dielectric Characteristics of PVA/PVP for Pressure Sensors

Augmented the Structure, Electronic and Optical Characteristics of PEO Doped NiO for Electronics Applications

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