Optical, morphological, electrical properties of ZnO-TiO2-SnO2/CeO2 semiconducting ternary nanocomposite

Varaprasad, H. Srinivasa; Sridevi, P. V.; Anuradha, M. Satya

doi:10.1016/j.apt.2021.02.042

Cited by 19 publications

(7 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 5a shows dielectric constant (ε') graphs of PVA and PVA/AgGaO 2 nanocomposite films across a frequency range of 50 Hz to 5MHz. It can be said that the dispersion of AgGaO 2 NPs in the PVA matrix results in an increased dielectric constant as well as better electrical characteristics, most likely due to the significant contribution from interfacial polarisation caused by the build-up of trapped charges at the interface (33) . Due to the deposition of space charges at the interfaces, the enhancement in dielectric constant could be produced by the condensed pinning effect of defects on the domain wall motion.…”

Section: Electrical Propertiesmentioning

confidence: 99%

Polymer nanocomposites comprising PVA matrix and AgGaO2 nanofillers: Probing the effect of intercalation on optical and dielectric response for optoelectronic applications

Somesh¹,

Shivakumar²,

Sangamesha³

et al. 2021

IJST

View full text Add to dashboard Cite

Objectives: Synthesis of hybrid nanoparticles (NPs) and intercalation of as prepared NPs inside polymer matrix to fabricate polymer nanocomposites (NC) and evaluate the optoelectronic properties. Method: A simple, time consuming solution combustion method was used to synthesize silver doped gallium oxide (AgGaO 2 ) NPs. The solution casting process was employed to prepare NC films of poly(vinyl alcohol) (PVA) with the inclusion of AgGaO 2 NPs as nanofiller. Finding: The analytical technique such as Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy and differential scanning calorimetry analyses were used to analyze the PVA/AgGaO 2 NC films. The findings of various characterization approaches showed that the morphological, structural and thermal characteristics of PVA/AgGaO 2 NC films had improved, as well as confirms the existence of AgGaO 2 NPs in the PVA matrix. Furthermore, the dielectric characteristics of the PVA/AgGaO 2 NC films were studied using an LCR meter at various frequencies (50 Hz-1 MHz). With intercalating four different wt% of AgGaO 2 NPs content as 0.5, 1, 2 and 4 wt% the dielectric constant and dielectric loss of NC films with 4 wt % AgGaO 2 NPs incorporated were 112.1 and 51.5 respectively. Novelty: This improvement in dielectric characteristics revealed the uniform distribution and effective interaction of AgGaO 2 NPs with the active site of PVA chains. The preceding findings demonstrated that the obtained PVA NCs were promising materials for flexible energy storage and UV-shielding applications.

show abstract

Section: Electrical Propertiesmentioning

confidence: 99%

Polymer nanocomposites comprising PVA matrix and AgGaO2 nanofillers: Probing the effect of intercalation on optical and dielectric response for optoelectronic applications

Somesh¹,

Shivakumar²,

Sangamesha³

et al. 2021

IJST

View full text Add to dashboard Cite

show abstract

“…FTIR (KBr, cm −1 ): 3420 (phenolic hydroxyl stretching vibration), 1637 (C�C stretching vibration), 1055 (Si−O−Si stretching vibration), 996 (C�C−H bending vibration). 1 Here, 150 mL of a mixture of (ABA-Si) main (2.21 g), paraformaldehyde (6.0 g), and toluene (75 mL) was added to a three-necked flask equipped with mechanical agitation. When the solution was heated to 90 °C, 3ethynylaniline (11.7 g) was added, then the reaction lasted for 5 h. After that, the solution was washed by a 1 M NaOH aqueous solution and deionized water three times.…”

Section: Synthesis Of Polyphenolmentioning

confidence: 99%

“…The cured samples were ground into powder and mixed with spectroscopy grade KBr to make pellets. 1 H NMR spectra were recorded with a Bruker Avance 400 Hz NMR spectrometer in CDCl 3 with tetramethylsilane (TMS) as an internal reference. DSC tests were conducted by a DSC Q20 (TA Instruments) at a heating rate of 10 °C/min under N 2 atmosphere.…”

Section: Curing Of Main Chain Type Benzoxazinesmentioning

confidence: 99%

“…As communication technology rapidly develops, polymeric materials with high heat resistance, low dielectric constants, and low dielectric loss are desired for fast signal transmission . Some polymers with relatively low dielectric constants like epoxy resin, cyanate resin, benzcyclic butene resin, and benzoxazine resin have been applied to manufacture copper clad laminates and radomes.…”

Section: Introductionmentioning

confidence: 99%

“…E RT 3 (1) where Φ is the front factor, which is assumed to be 1; T is the absolute temperature, R is the gas constant, and E′ is the storage modulus at T gl + 40 K. Consequently, the cross-linking density of poly(ABA-Si-ala) main was calculated to be 1.93 × 10 4 mol/m 3 , while that of poly(ABA-Si-a) main was just 1.05 × 10 3 mol/m 3 . Again, the results proved the fact that the alkynyl groups participated in the polymerization reaction and contributed more cross-linking entanglement.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Study on Silicon-Containing Main Chain Type Polybenzoxazines with Both High Heat Resistance and Low Dielectric Constant

Ran

Zhang

2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Polymeric materials with high heat resistance and low dielectric constants are desired for fast communication. To realize this purpose, two kinds of silicon-containing main chain type benzoxazines with and without an acetylene group, (ABA-Si-ala)main and (ABA-Si-a)main, were designed and synthesized from polyphenol oligomers, primary amines, and paraformaldehyde. Their chemical structures were characterized and verified by Fourier transform infrared (FTIR) spectra and nuclear magnetic resonance (NMR) spectra. Moreover, their curing behaviors and polymerization reactions were studied by differential scanning calorimetry (DSC) and FTIR spectra, and cross-linking structures were proposed. Furthermore, thermal properties of the two polybenzoxazines were analyzed by dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). The results showed that poly(ABA-Si-ala)main exhibited excellent heat resistance and thermal stability, and its T g and char yield at 800 °C under N2 reached as high as 308 °C and 48.5%, respectively, which were higher than those of poly(ABA-Si-a)main. In particular, the existence of the siloxane structure endowed the two polybenzoxazines with good dielectric properties, and the dielectric constants of poly(ABA-Si-ala)main and poly(ABA-Si-a)main were as low as 2.78 and 2.67 at 1 GHz, respectively. Such low dielectric constants will be necessary and vital for signal transmission. Therefore, this work provides a new and effective strategy for designing new polymers with both excellent heat resistance and low dielectric constants.

show abstract

BaO nanoparticle contribution to PVA on the way to become a more functional material

Beyazay,

Şahin,

Karabul

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, it is aimed to produce a non‐carcinogenic and environmentally friendly biodegradable multi‐functional PVA‐based nanocomposite by improving its electrical properties and mechanical strength. For this purpose, BaO nanoparticles produced by the co‐precipitation method, have been added to the PVA matrix between 0.5% and 5% by mass, and thick film nanocomposites have been produced. The structural properties of the samples and the doping particle have been investigated by FTIR, SEM, and XRD. While electrical measurements have been carried out by an impedance analyzer at room temperature between 20 Hz and 15 MHz frequency, tensile tests have been performed by a mechanical tensile device. The addition of 5% BaO nanoparticles not only increased the energy storage capability of PVA significantly (117%) but also managed to reduce the loss factor considerably (77%). Moreover, compared to other samples, PVA/5% BaO nanocomposite also stands out with its higher ac conductivity within the mid‐and high‐frequency range. Furthermore, the 5% BaO nanoparticle additive provided a serious benefit to the mechanical strength of PVA by improving its Young's modulus, toughness, and stress at the break at different rates. As a result, the BaO nanoparticle additive makes PVA a more functional material as well as more technologically desired.

show abstract

Optical, morphological, electrical properties of ZnO-TiO2-SnO2/CeO2 semiconducting ternary nanocomposite

Cited by 19 publications

References 33 publications

Polymer nanocomposites comprising PVA matrix and AgGaO2 nanofillers: Probing the effect of intercalation on optical and dielectric response for optoelectronic applications

Polymer nanocomposites comprising PVA matrix and AgGaO2 nanofillers: Probing the effect of intercalation on optical and dielectric response for optoelectronic applications

Study on Silicon-Containing Main Chain Type Polybenzoxazines with Both High Heat Resistance and Low Dielectric Constant

BaO nanoparticle contribution to PVA on the way to become a more functional material

Contact Info

Product

Resources

About