Structural, optical and thermal characterization of PVC/SnO2 nanocomposites

Taha, T.A.; Ismail, Zainab; El-Hawary, M.M.

doi:10.1007/s00339-018-1731-1

Cited by 62 publications

(18 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The vibration mode frequencies at 566, 614, 631 and 694 cm -1 are in agreement with that previously established by many autors for the C-Cl bond in the PVC polymer with non-crystalline phase [25]. The observed bands at frequencies 792, 996, 1095 and 1165 cm -1 are duce to the presence residual molecules of THF solvent used in the prepration of films [26,27]. Others vibration modes associated to the PVC polymer are located at 1316, 1425 and 1650 cm -1 , they are related to the vibrations of C-H bond [18,28,29].…”

Section: Raman Spectroscopysupporting

confidence: 89%

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

El-Hachemi

Sebais

Sabah

et al. 2021

J Inorg Organomet Polym

View full text Add to dashboard Cite

ZnTe nanoparticles (NPs) were synthesized using hydrothermal method and then were dispersed in poly(vinyl-chloride) (PVC) to prepare hybrid PVC/ZnTe nanocomposite thin films which were deposited on glass substrates by the dip coating technique. Structural, optical and electrical properties of films were investigated by different techniques. XRD analysis revealed that synthesized ZnTe NPs have a cubic structure and a nanoscale size,while pure PVC films have a weak degree of crystallinity and exhibit a broad diffraction peak at low angles. The PVC/ZnTe nanocomposite thin films display an intense diffraction peak corresponding to the plane ( 220) which indicates a preferred orientation of ZnTe nanocystallites along crystallographic axis [220]. This texture was also showed by the atomic force microscopy micrographs.The analysis by FT-IR and Raman vibrational spectroscopies confirmed the incorporation of ZnTe NPs in the PVC matrix.The ZnTe/PVC nanocomposites thin films have an optical transparency over 80 % in the visible range and an optical gap close to 4.07 eV. Discrepancies with respect to the gap of pure PVC (red shift) and bulk ZnTe (blue shift) are due to the effect of the interaction between the ZnTe NPsand the PVC matrixand alsoto the nanometric size of the ZnTe crystallites. Photoluminescence (PL) spectra showed an enhanced blue emission at 466 nm,a green emissionat 522 nm and a strong red emission at 686 nm. Thus the incorporation of oriented ZnTe NPs induced a new optical behavior of the PVC polymer matrix.Electrical measurements indicate a decrease of electrical resistivity of PVC/ZnTe nanocompositesas ZnTe NPs concentration increases.

show abstract

Section: Raman Spectroscopysupporting

confidence: 89%

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

El-Hachemi

Sebais

Sabah

et al. 2021

J Inorg Organomet Polym

View full text Add to dashboard Cite

show abstract

“…Most polymers absorb light in the UV region, this absorption is related to transitions between electronic energy levels of the bonds within these materials. For the PVC polymer, usually, two electronic transition bands appear in the UV wavelength region at around 286 and 197 nm [27,33], which respectively are allotted to - * electronic transition associated to unsaturated C=O bond which was observed in FT-IR spectra at around 1739 cm -1 and to C-Cl bond observed at 760 cm -1 [14,22,34]. The intensity and position of these absorbance bands are often influenced by the structural state of the polymer [35].…”

Section: Uv-visible Absorbancementioning

confidence: 99%

Structural, electrical and optical properties of PVC/ZnTe nanocomposite thin films

El-Hachemi

Sebais

Sabah

et al. 2021

Preprint

View full text Add to dashboard Cite

ZnTe nanoparticles (NPs) were synthesized using hydrothermal method and then were dispersed in poly(vinyl-chloride) (PVC) to prepare hybrid PVC/ZnTe nanocomposite thin films which were deposited on glass substrates by the dip coating technique. Structural, optical and electrical properties of films were investigated by different techniques. XRD analysis revealed that synthesized ZnTe NPs have a cubic structure and a nanoscale size,while pure PVC films have a weak degree of crystallinity and exhibit a broad diffraction peak at low angles. The PVC/ZnTe nanocomposite thin films display an intense diffraction peak corresponding to the plane (220) which indicates a preferred orientation of ZnTe nanocystallites along crystallographic axis [220]. This texture was also showed by the atomic force microscopy micrographs.The analysis by FT-IR and Raman vibrational spectroscopies confirmed the incorporation of ZnTe NPs in the PVC matrix.The ZnTe/PVC nanocomposites thin films have an optical transparency over 80 % in the visible range and an optical gap close to 4.07 eV. Discrepancies with respect to the gap of pure PVC (red shift) and bulk ZnTe (blue shift) are due to the effect of the interaction between the ZnTe NPsand the PVC matrixand alsoto the nanometric size of the ZnTe crystallites. Photoluminescence (PL) spectra showed an enhanced blue emission at 466 nm,a green emissionat 522 nm and a strong red emission at 686 nm. Thus the incorporation of oriented ZnTe NPs induced a new optical behavior of the PVC polymer matrix.Electrical measurements indicate a decrease of electrical resistivity of PVC/ZnTe nanocompositesas ZnTe NPs concentration increases.

show abstract

“…Many researchers have recently been interested in studying polymer nanocomposites because of their excellent properties [1,2] . Studies of polymer nanocomposites grafted with low percentages of fillers have shown distinct properties over conventional composites [3][4][5] . It appears from the relationship between permittivity and frequency of the polymer that it does not respond immediately upon application of an electric field.…”

Section: Introductionmentioning

confidence: 99%

FTIR and dielectric relaxation analysis for PVC-Pb3O4 polymer nanocomposites

Taha

Mahmoud

Hayat

et al. 2021

Preprint

View full text Add to dashboard Cite

This work studies the FTIR as well as dielectric characteristics of the PVC-Pb3O4 nanocomposite films. FTIR analysis shows the small shift in 650, 845 and 1732 cm− 1 band positions as a confirmation of interaction between Pb3O4 nanoparticles with PVC polymer matrix. The real permittivity (ε1) decreases with increasing frequency for all samples with the appearance of a relaxation peak at high temperatures. The dielectric loss data (ε2) of the PVC-Pb3O4 nanocomposite revealed a shift of the dielectric absorption peak towards high frequency with increasing the temperature. The activation energy values for both α and β relaxations almost decreased with increasing the Pb3O4 concentration. The energy density of samples containing Pb3O4 has a lower energy density than the pure PVC polymer film. The exponent s often increased with increasing the temperature, and this behavior is consistent with overlapping large-polaron tunneling model. The DC activation energy decreased when the percentage of Pb3O4 increased to 3.0 wt% and then increased at 4.0 wt%. Additionally, a convergence between these values and the activation energies of α and β relaxations observed, which is indicates that the same type of charge carriers participate in the processes.

show abstract

Structural, optical and thermal characterization of PVC/SnO2 nanocomposites

Cited by 62 publications

References 47 publications

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

Structural, Electrical and Optical Properties of PVC/ZnTe Nanocomposite Thin Films

Structural, electrical and optical properties of PVC/ZnTe nanocomposite thin films

FTIR and dielectric relaxation analysis for PVC-Pb3O4 polymer nanocomposites

Contact Info

Product

Resources

About