Synergistic effect of barium titanate nanoparticles and graphene quantum dots on the dielectric properties and conductivity of poly(vinylidenefluoride-co-hexafluoroethylene) films

Kumar, Y. Ravi; Pasha, S. K. Khadheer

doi:10.1016/j.envres.2021.112297

Cited by 22 publications

(8 citation statements)

References 48 publications

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“…The surface modification is clearly demonstrated in which the nanocomposite film is seen to crumple, but the BTO remains uniformly distributed, suggesting that the GQD forms a strong interaction with the host polymer PDMS. The nanocomposite films become more crumpled as the GQD concentration increases and this crumpling effect provides an increased roughness in the systems, which could be useful for the application of TENGs . In Figure g, a close-up image of the PDMS/BTO/G30 is shown.…”

Section: Resultsmentioning

confidence: 99%

“…The nanocomposite films become more crumpled as the GQD concentration increases and this crumpling effect provides an increased roughness in the systems, which could be useful for the application of TENGs. 30 In Figure 5 g, a close-up image of the PDMS/BTO/G30 is shown. The higher magnification micrograph of PDMS/BTO/G30 with a 30% concentration of the GQD reveals a clearly crumpled surface of the nanocomposites.…”

Section: Resultsmentioning

confidence: 99%

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Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Hatta,

Mohammad Haniff,

Ambri Mohamed

2024

ACS Omega

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Triboelectric nanogenerators (TENGs) have been developed as promising energy-harvesting devices to effectively convert mechanical energy into electricity. TENGs use either organic or inorganic materials to initiate the triboelectrification process, followed by charge separation. In this study, a high-performance composite-based triboelectric nanogenerator (CTENG) device was fabricated, comprising polydimethylsiloxane (PDMS) as a polymeric matrix, barium titanite (BTO) nanopowders as dielectric fillers, and graphene quantum dots (GQDs) as conductive media. The PDMS/BTO/GQD composite film was prepared with GQDs doped into the mixture of PDMS/BTO and mechanically stirred. The composition of the GQD varied from 0 to 40 wt %. The composite was spin-coated onto flexible ITO on a PET sheet and dried in an oven at 80 °C for 24 h. The output performance of TENGs is enhanced by the increased concentration of 30 wt % GQD, which is 2 times higher than nanocomposite films without GQD. The PDMS/BTO/G30 TENG film depicted an increase in open-circuit voltage output (V OC ), short-circuit current output (I SC ), and power density reaching ∼310.0 V, ∼23.0 μA, and 1.6 W/m 2 , respectively. The simple and scalable process for the PDMS/BTO/GQD TENGs would benefit as a sustainable energy-harvesting system in small electronic devices.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Hatta,

Mohammad Haniff,

Ambri Mohamed

2024

ACS Omega

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“…A considerable amount of energy is lost due to the restriction of alignments by other dipole effects. Moreover, ionic, electronic, and dipolar losses are present in all samples at low frequencies resulting in a substantial loss in that range [104,105]. At higher frequencies, tanδ E has extremely tiny values, indicating that the dipoles having tiny effective masses (e.g., ferroelectric, electrons domains) assist the majority of the dielectric constant rather than Defects in charge (i.e., oxygen vacancies) having significant effective masses [106].…”

Section: Frequency-dependent Dielectric Constant Measurementmentioning

confidence: 92%

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Mahmud

Ahamed

Khan

2022

Mater. Res. Express

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In this research, structural, magnetic, electrical, and optical properties of Al3+ substituted Ba0.6Sr0.4Ti1-xAlxO3 ceramics (where x = 0.00 to 0.20) have been investigated and discussed. The ceramic samples have been successfully synthesized by the conventional solid-state reaction method. The crystallinity of the prepared samples has been confirmed by X-ray peak broadening techniques such as the Williamson Hall (W-H) plot technique and the Scherrer method. The lattice constant "a", showing a significant drop as Al concentration increases, varies from 3.9420A to 3.9210A. The FTIR spectrum revealed a prominent peak between 435 cm−1 to 540 cm−1, without showing any secondary phase. Raman spectroscopic analysis showed that the prepared samples are in cubic phase with no phase transition. The shifting of a dominating peak in Raman at 580 cm-1 is due to the development of AlTi defects. VSM analysis at room temperature showed the ferromagnetic characteristics of all the samples. The highest value of the anisotropic constant (Ka~39.933 emu/cm3) has been seen at x=0.10. The real component of initial permeability is almost constant for the frequency range of about 75 MHz, and above this frequency range, it quickly reduces. At the high-frequency range, the prepared samples show an excellent relative quality factor due to the low dielectric loss, notably when x = 0.05. The prepared perovskites exhibited minimum eddy current loss characteristics due to the increment of AC resistivity at x=0.20. UV–visible spectroscopy shows a significant change in the energy bandgap from 3.23 eV to 3.04 eV with the doping concentrations.

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“…25 The differences in the peaks range from 500 to 790 cm À1 in Figure 3b, c affirmed the presence of GQDs in the PVDF-HFP. 26 Also compared to PVDF-HFP, the α phase peaks at 761 and 613 cm À1 are suppressed with the addition of MMT in PVDF-HFP/MMT and PVDF-HFP/MMT/GQDs nanocomposites. This is due to the increasing water absorption in PNCs which resulted in the weakening of peaks at 761 and 613 cm À1 which eventually disappeared.…”

Section: Characterization Techniquesmentioning

confidence: 98%

Dielectric properties of nano‐MMT and graphene quantum dots embedded poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite films

Kumar

Deshmukh

Kadlec

et al. 2023

J of Applied Polymer Sci

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In this work, montmorillonite (MMT) nanoclay and graphene quantum dots (GQDs) embedded poly (vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) nanocomposite films were prepared using the solution-casting technique and characterized using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Scanning electron microscopy (SEM) and Atomic force microscopy (AFM). The thermal, mechanical and dielectric properties of PVDF-HFP/MMT/GQDs nanocomposite films were also investigated. The dielectric constant (ϵ 0 ), dielectric loss (ϵ 00 ) and conductivity (σ) of synthesized nanocomposite films were evaluated in the frequency and temperature range f100 Hz-1 MHz and 30-150 C, respectively. The highest ϵ 0 with relatively high ϵ 00 was achieved at low frequency for increasing temperature for all the nanocomposite films. The conductivity results showed good increment from lower to higher frequency up to 100 kHz at increasing temperature. The Cole-Cole plots represent the complex impedance of PVDF-HFP/MMT/GQDs nanocomposites at 150 C. The attained results imply that the PVDF-HFP/MMT/GQDs nanocomposite films can be useful candidates for flexible electronic devices.

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Synergistic effect of barium titanate nanoparticles and graphene quantum dots on the dielectric properties and conductivity of poly(vinylidenefluoride-co-hexafluoroethylene) films

Cited by 22 publications

References 48 publications

Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering

Dielectric properties of nano‐MMT and graphene quantum dots embedded poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite films

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Synergistic effect of barium titanate nanoparticles and graphene quantum dots on the dielectric properties and conductivity of poly(vinylidenefluoride-co-hexafluoroethylene) films

Cited by 22 publications

References 48 publications

Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Enhanced-Performance Triboelectric Nanogenerator Based on Polydimethylsiloxane/Barium Titanate/Graphene Quantum Dot Nanocomposites for Energy Harvesting

Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba0.6Sr0.4Ti1-xAlxO3 ceramics via Sr and Al Co-doping engineering

Dielectric properties of nano‐MMT and graphene quantum dots embedded poly (vinylidene fluoride‐co‐hexafluoropropylene) nanocomposite films

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Giant effect on structural, magnetic, electrical, and optical properties of lead-free Ba_0.6Sr_0.4Ti_1-xAl_xO₃ ceramics via Sr and Al Co-doping engineering