Structural and optical properties of pure PVA/PPY and cobalt chloride doped PVA/PPY films

El-Komy, G.M.; Mousa, Ahmed S.; Mostafa, H. Abo

doi:10.1016/j.arabjc.2012.04.037

Cited by 33 publications

(11 citation statements)

References 24 publications

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“…The researcher suggested that PVA based composite might be used in organic solar cells and optoelectronic devices . Elkomy et al doped PVA–polypyrrol (PPY) with cobalt chloride (CoCl 2 ), and investigated the optical properties of nanocomposites. The band gap of PVA–PPY composite (2.68 eV) was decreased to 2.03 eV after adding 1 wt% CoCl 2 [29].…”

Section: Physics Of Pvamentioning

confidence: 99%

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Aslam

Kalyar

Raza

2018

Polymer Engineering & Sci

459

229

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This review presents the nature, fundamental structure, and various morphologies of native poly(vinyl alcohol) (PVA) matrix. It highlights recent advances in pure PVA and its composites containing various nanofillers that have potential applications in various fields. Over half a century, PVA is known as an auspicious material for diverse applications. The review focuses on the structural, mechanical, optical, and electrical properties of PVA‐based nanocomposites. The study highlights a new promising area of optoelectronics for possible applications of PVA nanocomposites. The challenges and opportunities in working with various PVA nanocomposites are discussed along with some future recommendations are presented to strengthen this area of research. POLYM. ENG. SCI., 58:2119–2132, 2018. © 2018 Society of Plastics Engineers

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Section: Physics Of Pvamentioning

confidence: 99%

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Aslam

Kalyar

Raza

2018

Polymer Engineering & Sci

459

229

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“…In this experiment, the optical absorption value for pure PVA was not measured, but previous studies showed that the optical absorption peak for pure PVA was also in the UV region [ 37 , 38 ]. The blending of H 3 PO 4 into PVA was expected to form of the complex PVA–H 3 PO 4 , which can be evaluated by IR, NMR and XRD spectra [ 39 ].…”

Section: Resultsmentioning

confidence: 99%

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Susilawati

Prayogi²,

Arif

et al. 2021

Polymers

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This study assesses the optical properties and conductivity of PVA–H3PO4 (polyvinyl alcohol–phosphoric acid) polymer film blend irradiated by gamma (γ) rays. The PVA–H3PO4 polymer film blend was prepared by the solvent-casting method at H3PO4 concentrations of 75 v% and 85 v%, and then irradiated up to 25 kGy using γ-rays from the Cobalt-60 isotope source. The optical absorption spectrum was measured using an ultraviolet–visible spectrophotometer over a wavelength range of 200 to 700 nm. It was found that the absorption peaks are in three regions, namely two peaks in the ultraviolet region (310 and 350 nm) and one peak in the visible region (550 nm). The presence of an absorption peak after being exposed to hυ energy indicates a transition of electrons from HOMO to LUMO within the polymer chain. The study of optical absorption shows that the energy band gap (energy gap) depends on the radiation dose and the concentration of H3PO4 in the polymer film blend. The optical absorption, absorption edge, and energy gap decrease with increasing H3PO4 concentration and radiation dose. The interaction between PVA and H3PO4 blend led to an increase in the conductivity of the resulting polymer blend film.

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“…Control PVA exhibits a typical peak at 19.45 0 , which indicates the semi-crystalline nature of PVA [22,23]. Pure PPy displays a broad peak at 25.35 0 in its diffraction pattern.…”

Section: Xrd Analysismentioning

confidence: 98%

Development of Room Temperature Operating NH3 Gas Sensor Based on Free Standing PPy-PVA Composite Films

2016

IJSR

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Abstract:In the present investigation, room temperature operating ammonia (NH 3 ) gas sensor based on free-standing PolypyrrolePolyvinyl alcohol (PPy-PVA) composite films has been fabricated. The PPy-PVA composite films were synthesized by an in situ chemical polymerization of Pyrrole in the presence of PVA. The synthesized films were characterized by Scanning Electron Microscopy (SEM), Fourier Transforms Infrared Spectroscopy (FTIR) and X-ray Diffraction (XRD). The DC electrical conductivity ( ) of the composite films has been investigated by two probe method and was found to be 2.16×10 -3 S/cm at room temperature. Ammonia gas sensing behaviour of films was studied. Gas sensing tests demonstrated that the composite films exhibited a fast response, rapid recovery and high sensitivity at room temperature with a detection of low concentration (25 to 300 ppm) of ammonia gas. This work demonstrates the potential of using PPy-PVA composite films as sensing material in the fabrication of room temperature operating ammonia sensor.

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Structural and optical properties of pure PVA/PPY and cobalt chloride doped PVA/PPY films

Cited by 33 publications

References 24 publications

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Polyvinyl alcohol: A review of research status and use of polyvinyl alcohol based nanocomposites

Optical Properties and Conductivity of PVA–H3PO4 (Polyvinyl Alcohol–Phosphoric Acid) Film Blend Irradiated by γ-Rays

Development of Room Temperature Operating NH3 Gas Sensor Based on Free Standing PPy-PVA Composite Films

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