Experimental study of the microstructure and optical properties of PVA-PVP blend filled with lead nitrate

Hammannavar, Preeti B.; Lobo, Blaise

doi:10.1016/j.matpr.2018.01.048

Cited by 10 publications

(2 citation statements)

References 16 publications

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“…Herein, the peaks observed from the Bi-metal increased with the concentration of bismuth in polymer, and the intensity of diffraction peaks from PVA/PVP decreased, probably due to interaction between the Bi-particles and the hydrogen bond. These observations are consistent with other prior research on PVA filled by CdSe quantum dots and PVP/PVA doped with Pb(NO 3 ) 2 [27,28].…”

Section: X-ray Diffraction (Xrd) Investigationsupporting

confidence: 93%

Microstructure Study and Linear/Nonlinear Optical Performance of Bi-Embedded PVP/PVA Films for Optoelectronic and Optical Cut-Off Applications

et al. 2022

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Hybrid polymer films of polyvinyl pyrrolidone (PVP)/polyvinyl alcohol (PVA) embedded with gradient levels of Bi-powder were prepared using a conventional solution casting process. XRD, FTIR, and SEM techniques have been used to examine the micro/molecular structure and morphology of the synthesized flexible films. The intensities of the diffraction peaks and transmission spectrum of the PVP/PVA gradually declined with the introduction of Bi-metal. In addition, filler changes the microstructure surface of the pure film. The modification in the microstructure leads to an enhancement in the optical absorption characteristic of the blend films. The indirect allowed transition energy was calculated via Tauc’s and ASF (Absorption Spectra Fitting) models. The decrease in the hybrid film’s bandgap returns to the localized states in the forbidden region, which led the present films to be suitable for photo-electric, solar cell, etc., applications. The relation between the transition energy and the refractive index was studied. The enhancement in the refractive index with Bi-metal concentrations led to use the as-prepared films in optical sensors. The rise of Bi-metal concentrations leads also to the improvement of the nonlinear susceptibility and refractive parameters. The optical limiting characteristics revealed that the higher concentration dopant films reduce the light transmission intensity which is appropriate for laser attenuation and optical limiting in photonic devices. The results suggest that hybrid films are promising materials in a wide range of opto-electronic applications.

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Section: X-ray Diffraction (Xrd) Investigationsupporting

confidence: 93%

Microstructure Study and Linear/Nonlinear Optical Performance of Bi-Embedded PVP/PVA Films for Optoelectronic and Optical Cut-Off Applications

et al. 2022

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“…FT-IR spectrophotometry measurements are considered as an essential method to investigate the bonds' stretching and vibrations or other structure changes that occur due to the filling process of ternary Zn 1-x Sn x S in the host PVP polymer [29]. The variations in the FT-IR measurements ensure the interactions between the filler and the functional groups of the host PVP polymer [30,31].…”

Section: Ft-ir Analysismentioning

confidence: 99%

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Badawi

2021

Appl. Phys. A

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The optical properties of polyvinylpyrrolidine (PVP) polymer have been enhanced using ternary Zn 1-x Sn x S as a filler for UVregion optical applications. Solution casting technique is used to prepare different Sn molar ratios (x: 0-0.3) in Zn 1-x Sn x S filled PVP polymeric composite films (1.0 wt.%). SEM, FT-IR and UV-visible-NIR spectrophotometry is utilized to characterize the optical properties of the plain PVP and polymeric composite films. SEM images reveal the homogeneous dispersion of the filler (Zn 1-x Sn x S) in the host PVP matrix. The FT-IR spectroscopic measurements ensure the successful interaction of ternary Zn 1-x Sn x S material and the host PVP polymer. The cut off transmittance edge is shifted from 260 nm (host PVP) to 390 nm (polymeric composite). The direct optical energy bandgap of the prepared polymeric composite films are shifted from 4.78 eV (plain PVP) to 3.45 eV for Zn 0.7 Sn 0.3 S polymeric composite film. An enhancement of the refractive index (n) and the optical conductivity (σ opt.) of the polymeric composite films is achieved as compared with those of the plain one. The single oscillator (E 0) and dispersion (E d) energies of the polymeric composite films were determined using Wemple and DiDomenico (WDD) model. The prepared polymeric composite films are strongly recommended for UV-region optical applications.

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Boosting of structural, thermal, linear, and nonlinear optical properties of PVA/PVP blend using titanium dioxide filler

Elkalashy,

Khater,

Zaki

2024

Polymer Engineering & Sci

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In the current work, a blend matrix that combines polyvinyl alcohol and polyvinyl pyrrolidone (PVA/PVP) was reinforced by titanium dioxide (TiO2) nanoparticles via the casting technique. The FTIR spectra and XRD examinations of nanocomposites offer insight into the structural changes that have taken place with the inclusion of TiO2 in the blend matrix. TiO2 elements were detected via the EDX detector linked to a scanning electron microscope (SEM). The transmission and absorption of the PVA/PVP‐TiO2 blend were evaluated via a UV–visible spectrophotometer. Tauc's model demarcated the optical bandgap (Eg), which declined from 4.91 eV for the pure to 4.66 eV for PVA/PVP—0.75 wt.%TiO2 film. The refractive index increases from 1.903 to 6.646 for pure blend and PVA/PVA/0.75 wt%TiO2, respectively. The nonlinear optical features (as predicted by the Wemple‐DiDomenico model) are enriched. The proliferation of TiO2 into the blend matrix significantly increased the third‐order nonlinear optical susceptibility χ(3), from 1.87 × 10−14 for pure blend to 5.091 × 10−13 for PVA/PVP‐0.75 wt.% TiO2, attributed to the oscillation of surface plasmons of TiO2 NPs. The thermal stability of the films was inspected. Doping the blend with TiO2 enhanced its thermal stability. The TiO2‐filled PVA/PVP films demonstrate hopeful features for various requests and can be utilized in optoelectronics and optical devices due to their tunable optical parameters and thermal stability.Highlights Thermal stability was enhanced with loading TiO2 nanoparticles in PVA/PVP matrix. The PVA/PVP–TiO2 films optical parameters were studied. Extinction coefficient and refractive index were enhanced with loading TiO2 in PVA/PVP matrix. Proliferation of TiO2 into the matrix significantly increased the nonlinear optical susceptibility of third‐order χ(3).

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Experimental study of the microstructure and optical properties of PVA-PVP blend filled with lead nitrate

Cited by 10 publications

References 16 publications

Microstructure Study and Linear/Nonlinear Optical Performance of Bi-Embedded PVP/PVA Films for Optoelectronic and Optical Cut-Off Applications

Microstructure Study and Linear/Nonlinear Optical Performance of Bi-Embedded PVP/PVA Films for Optoelectronic and Optical Cut-Off Applications

Enhancement of the optical properties of PVP using Zn1-xSnxS for UV-region optical applications

Boosting of structural, thermal, linear, and nonlinear optical properties of PVA/PVP blend using titanium dioxide filler

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