Studies on DC conductivity and LPG sensing behaviour of nanostructured polypyrrole-CeO2 composites

Seema, Syeda; Prasad, M. V. N. Ambika

doi:10.1063/1.5047737

Cited by 8 publications

(3 citation statements)

References 4 publications

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“…The conductivity increased to 23.1 S/cm when the CeO 2 NP amount of up to 25 wt.% was added; then, it decreased at the higher CeO 2 NP concentration. This result is the same as the result obtained by Seema and Prasad [30], who determined that electrical conductivity was due to the excessive formation of charge carriers. Here, the decrease in conductivity may be due to the relatively large dimension of the CeO 2 NPs, which hinders the hopping of the charge carrier.…”

Section: Electrical Conductivity Characterization Of the Ceosupporting

confidence: 91%

Cerium Oxide/Polypyrrole Nanocomposite as the Matrix for Cholesterol Biosensor

Anh

Thu²,

Dang

et al. 2021

Advances in Polymer Technology

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A nanocomposite comprising cerium oxide nanoparticles (CeO2 NPs) and polypyrrole (PPy) was fabricated onto a microelectrode for cholesterol sensing application. The cholesterol oxidase (ChOx) was immobilized on the CeO2 NPs/PPy/electrode by the physical adsorption route. The structure and morphology of the CeO2 NPs/PPy nanocomposite were characterized by X-ray diffraction, field emission scanning electron microscopy, and energy dispersive X-ray spectroscopy. Results showed that the ChOx/CeO2 NPs/PPy/electrode was linearly related with cholesterol in the range of 50 to 500 mg/dL. The sensitivity of ChOx/CeO2 NPs/PPy/electrode was 5.7 × 10 − 6 mA/mg⋅dL−1. The optimal parameters, including pH value and temperature, and selectivity, storage stability, and reproducibility of ChOx/CeO2 NPs/PPy/electrode were investigated.

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Section: Electrical Conductivity Characterization Of the Ceosupporting

confidence: 91%

Cerium Oxide/Polypyrrole Nanocomposite as the Matrix for Cholesterol Biosensor

Anh

Thu²,

Dang

et al. 2021

Advances in Polymer Technology

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“…Jiahua et al 23 showed that PPy-WO 3 nanocomposites had a negative dielectric constant at low frequencies due to the resonance and greatly improved electrical conductivity and thermal stability. Syeda et al 24 reported the gas-sensing properties of PPy-CeO 2 nanocomposites to liquefied petroleum gas. However, the energy conversion properties of these nanocomposites in Schottky DC generators have not been explored.…”

Section: Introductionmentioning

confidence: 99%

Schottky DC generators from polypyrrole nanocomposites of N-type semiconductor metal oxides and the multiple device connection effect

et al. 2023

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“…The effect of CeO 2 on the structure, morphology, as well as dielectric properties of PVA/PPy blend composites, was studied by Mohanpriya et al [ 37 ]. The DC conductivity as well as sensing behavior of nanostructured polypyrrole-CeO 2 composites towards LPG was studied by Seema et al [ 38 ]. The effect CeO 2 incorporation has on the ion-exchange properties of polypyrrole films doped by dodecylsulfate was investigated by Benmouhoub et al [ 39 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Reproducible and Selective Ammonia Vapor Sensor-Pellet of Polypyrrole/Cerium Oxide Nanocomposite for Prompt Detection at Room Temperature

et al. 2021

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Polypyrrole (PPy) and polypyrrole/cerium oxide nanocomposite (PPy/CeO2) were prepared by the chemical oxidative method in an aqueous medium using anhydrous ferric chloride (FeCl3) as an oxidant. The successful formulation of materials was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmittance electron microscopy (TEM). A four-in-line probe device was used for studying DC electrical conductivity and ammonia vapor sensing properties of PPy and PPy/CeO2. The significant improvement in both the conductivity and sensing parameters of PPy/CeO2 compared to pristine PPy reveals some synergistic/electronic interaction between PPy and cerium oxide nanoparticles (CeO2 NPs) working at molecular levels. The initial conductivity (i.e., conductivity at room temperature) was found to be 0.152 Scm−1 and 1.295 Scm−1 for PPy and PPy/CeO2, respectively. Also, PPy/CeO2 showed much better conductivity retention than pristine PPy under both the isothermal and cyclic ageing conditions. Ammonia vapor sensing was carried out at different concentration (0.01, 0.03, 0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 vol %). The sensing response of PPy/CeO2 varied with varying concentrations. At 0.5 vol % ammonia concentration, the % sensing response of PPy and PPy/CeO2 sensor was found to be 39.1% and 93.4%, respectively. The sensing efficiency of the PPy/CeO2 sensor was also evaluated at 0.4. 0.3, 0.2, 0.1, 0.05, 0.03, and 0.01 vol % ammonia concentration in terms of % sensing response, response/recovery time, reversibility, selectivity as well as stability at room temperature.

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Studies on DC conductivity and LPG sensing behaviour of nanostructured polypyrrole-CeO2 composites

Cited by 8 publications

References 4 publications

Cerium Oxide/Polypyrrole Nanocomposite as the Matrix for Cholesterol Biosensor

Cerium Oxide/Polypyrrole Nanocomposite as the Matrix for Cholesterol Biosensor

Schottky DC generators from polypyrrole nanocomposites of N-type semiconductor metal oxides and the multiple device connection effect

Fabrication of Reproducible and Selective Ammonia Vapor Sensor-Pellet of Polypyrrole/Cerium Oxide Nanocomposite for Prompt Detection at Room Temperature

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