Synthesis of PVA/CeO2 Based Nanocomposites with Tuned Refractive Index and Reduced Absorption Edge: Structural and Optical Studies

Aziz, Shujahadeen B.; Dannoun, Elham M. A.; Tahir, Dana A.; Hussen, Sarkawt A.; Abdulwahid, Rebar T.; Nofal, Muaffaq M.; Abdullah, Ranjdar M.; Hussein, Ahang M.; Brevik, Iver

doi:10.3390/ma14061570

Cited by 61 publications

(17 citation statements)

References 83 publications

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“…It is clear that n of the pristine PVA/G behaves quasi‐steady in the Vis–NIR spectra region, which is compatible with the reported findings. [ 37,73 ] While it is noticed that Fe 2 O 3 NPs filling has a pronounced effect on the refractive index of the host PVA/G matrix. Moreover at any certain incident wavelength λ , the refractive index of the NC film increases as the concentration of the nano fillers is increased up to 10 wt%.…”

Section: Resultsmentioning

confidence: 99%

“…[ 35 ] Also, the optical bandgap of Cu/MnS NPs filled PVA/PVP blend was explored by Heiba group. [ 36 ] Aziz et al [ 37 ] showed that tuning the refractive index and the absorption of PVA polymer could be achieved via filling with CeO 2 NPs. The photoluminescence and electrical properties of PVA polymer were tuned via filling with Ag 2 S NPs by Al‐Harthi et al [ 11 ] Taha and Alzara explored the dielectric and thermal behavior of PVA filled with SrTiO 3 .…”

Section: Introductionmentioning

confidence: 99%

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The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Badawi

Alharthi

Althobaiti

et al. 2021

Vinyl Additive Technology

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The effect of iron oxide nanoparticles (Fe2O3 NPs) content on the structural and optical parameters of polyvinyl alcohol/graphene (PVA/G) blend has been investigated. Fe2O3 NPs were synthesized by the hydrothermal procedure. Nanocomposite (NC) films of PVA/G filled with different amounts of Fe2O3 NPs were equipped using the solution casting technique. The surface morphology, structural, and optical properties were examined by scanning electron microscope (SEM), X‐ray diffraction (XRD), and ultraviolet‐visible‐near‐IR (UV‐Vis‐NIR) spectrophotometry techniques, respectively. SEM micrographs reveal the homogenous distribution of Fe2O3 NPs in the PVA/G matrix. The XRD analysis exhibits the formulation of the hematite phase of Fe2O3 NPs and the semi‐crystalline nature of PVA/G NC films. The UV‐Vis‐NIR data analysis shows that the optical properties of the PVA/G blend could be tailored via Fe2O3 NPs filling. Wemple–DiDomenico model is utilized to explore the dispersion parameters of the prepared NCs. A significant effect of Fe2O3 NPs filling is realized on the oscillator and dispersion energies, infinite refractive index, dielectric constant, average oscillator strength and the lattice dielectric constant of the NC films. PVA/G filled Fe2O3 NPs are suggested for different optical and storage applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Badawi

Alharthi

Althobaiti

et al. 2021

Vinyl Additive Technology

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“…[ 47 ] Dispersion energy E d gives the normal electronic excitation spectrum and measures a mean strength of inter band transitions which was described by the charge distribution within unit cell whereas Oscillator energy E o estimates mean energy gap between centers of valence band and conduction band (direct bandgap). [ 48,49 ] Refractive index was associated with photon energy hν by an empirical equation:

n^{2} = 1 + \frac{E_{o} E_{d}}{E_{o}^{2} - {(h ν)}^{2}}

…”

Section: Resultsmentioning

confidence: 99%

Structural and Optical Properties of Polyvinyl Alcohol/Zinc Oxide Nanocomposites

Vanitha¹,

Kanchana²,

Basavaraj³

et al. 2023

Physica Status Solidi (a)

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Herein, pristine poly(vinyl alcohol) (PVA) and PVA‐zinc oxide (ZnO) nanocomposite thin films are prepared by solution casting method with different wt% of ZnO (0.1, 0.2, 0.3, 0.5 wt%) nanoparticles with PVA polymer matrix. The addition of ZnO in a PVA matrix induces decrease in the transparency of films. The structural characteristics of prepared thin films are analyzed by X‐ray diffraction (XRD), Fourier transform infrared (FTIR) and Raman spectroscopy. XRD confirms the presence of ZnO structure and β‐phase in the synthesized films. The average crystallite size of the prepared thin films were determined by Scherer's equation. XRD result shows increase in percentage crystallinity of the films. Vibrational modes and functional groups present in pristine PVA and PVA/ZnO thin films are identified by FT‐IR and Raman spectroscopy. FTIR analysis shows the characteristics bands, which corresponds to O–H and Zn–O bands present in the films. Raman spectra of pristine PVA and PVA/ZnO films are reported. Optical characteristics of synthesized pristine PVA and PVA/ZnO nanocomposite thin films are studied by UV–vis spectroscopy. Optical constants like absorption edge, direct bandgap, optical dielectric constant, loss, and optical conductivity were estimated, and optical dispersion parameters are calculated by single oscillator model.

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“…The refractive index and its dispersion behavior are among the key optical material properties to be studied. The refractive index dispersion is crucial in evaluating the optical communication for spectral dispersion [ 105 ].…”

Section: Resultsmentioning

confidence: 99%

Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

et al. 2021

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In this work, a green approach was implemented to prepare polymer composites using polyvinyl alcohol polymer and the extract of black tea leaves (polyphenols) in a complex form with Co2+ ions. A range of techniques was used to characterize the Co2+ complex and polymer composite, such as Ultraviolet–visible (UV-Visible) spectroscopy, Fourier transform infrared spectroscopy (FTIR), and X-ray diffraction (XRD). The optical parameters of absorption edge, refractive index (n), dielectric properties including real and imaginary parts (εr, and εi) were also investigated. The FRIR and XRD spectra were used to examine the compatibility between the PVA polymer and Co2+-polyphenol complex. The extent of interaction was evidenced from the shifts and change in the intensity of the peaks. The relatively wide amorphous phase in PVA polymer increased upon insertion of the Co2+-polyphenol complex. The amorphous character of the Co2+ complex was emphasized with the appearance of a hump in the XRD pattern. From UV-Visible spectroscopy, the optical properties, such as absorption edge, refractive index (n), (εr), (εi), and bandgap energy (Eg) of parent PVA and composite films were specified. The Eg of PVA was lowered from 5.8 to 1.82 eV upon addition of 45 mL of Co2+-polyphenol complex. The N/m* was calculated from the optical dielectric function. Ultimately, various types of electronic transitions within the polymer composites were specified using Tauc’s method. The direct bandgap (DBG) treatment of polymer composites with a developed amorphous phase is fundamental for commercialization in optoelectronic devices.

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Synthesis of PVA/CeO2 Based Nanocomposites with Tuned Refractive Index and Reduced Absorption Edge: Structural and Optical Studies

Cited by 61 publications

References 83 publications

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

The effect of iron oxide content on the structural and optical parameters of polyvinyl alcohol/graphene nanocomposite films

Structural and Optical Properties of Polyvinyl Alcohol/Zinc Oxide Nanocomposites

Polymer Composites with 0.98 Transparencies and Small Optical Energy Band Gap Using a Promising Green Methodology: Structural and Optical Properties

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