PdCl2–Polyaniline Composite for CO Detection Applications: Electrical and Optical Response

Arafa, Isam M.; El‐Ghanem, H. M.; Bani-Doumi, Khetam A.

doi:10.1007/s10904-012-9785-6

Cited by 8 publications

(5 citation statements)

References 52 publications

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“…Interestingly, HS has two broad peaks (not observed in the other materials) at 2q ¼ 11.0 and 17.8 . PANI-EB has been reported to have a single broad peak [55][56][57] or several other P-XRD peaks 54,58 between from 2q ¼ 15-35 . In this work, the PANI-EB materials prepared herein are more crystalline as evidenced by the appearance of several distinctive peaks.…”

Section: Resultsmentioning

confidence: 99%

Investigation of templated and supported polyaniline adsorbent materials

et al. 2015

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Various structural forms of poly(aniline) (PANI) were synthesized in aqueous solution with different acids and/or a chitosan template support to afford nanoparticle PANI (NP; synthesized in water), bulk-PANI (aqueous acetic acid (HAc), hydrochloric acid (HCl) and sulfuric acid (SA) and a chitosan-PANI composite (CH) material. The polymer materials were characterized using spectroscopy ( 1 H NMR, FT-IR, UV-vis), TGA and P-XRD. The polymer materials were structurally diverse according to their unique morphology related to the ratio between quinoid and benzenoid monomer units of PANI. The sorption and kinetic uptake properties of PANI materials with methylene blue (MB) in aqueous solution were studied where variable sorption capacity was observed, as follows: NP > HAc > HCl > SA > CH. The Sips isotherm model describes the adsorptive equilibrium uptake while the pseudo-second order kinetic model describes the time dependent uptake of MB. The monolayer sorption capacities (Q m ) reported herein are among the highest (ca. 6-fold greater) relative to other Q m values reported for PANI materials in the literature.

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Section: Resultsmentioning

confidence: 99%

Investigation of templated and supported polyaniline adsorbent materials

et al. 2015

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“…The observed non‐linear curves indicate that the conduction in these composites is not purely electronic but is influenced by different possible factors such as temperature, induced ionization, phonon migration, and induced ionic conduction. [ 50–52 ] This nonohmic trend is generally encountered in diodes, thermistors, heated filaments, and PV cells. Recently, Katsufuji et al addressed the non‐linear behaviour of resistance in various disordered systems and reported that the resistivity decreases as a function of current density/electric field but does not rely on the temperature or the materials.…”

Section: Resultsmentioning

confidence: 99%

“…Here, the non‐linearity of the I–V curves was analyzed by taking the logarithmic form as described by Equations (5) and (6) where I, V, α , and G are the current, voltage, ohmicity, and conductance (G = σ × area/thickness), respectively. [ 52 ] The α can be estimated from the slope of Ln (I) − Ln (V) linear plots, where the obtained values ( α = 1.76–1.23) show substantial deviation from unity ( α = 1) of pure electronic conduction, thus indicating higher ionic/mass diffusion in Ni 0 :Ni‐BO 3 , Table 4.

I = {normalV}^{α} \times G

Ln (normalI) = α Ln (normalV) + Ln (normalG)

…”

Section: Resultsmentioning

confidence: 99%

Thermoelectric performance of Ni, Co, and Fe nanoparticles incorporated into their metal borates glassy matrices

2022

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Here, we present our current attempt to intrinsically dope Ni 0 , Co 0 , and Fe 0 nanoparticles within Ni II -, Co II -, and Fe II -borate glassy matrices, respectively. The system was prepared by one-pot reaction of the desired M T II salt with excess NaBH 4 through an in-situ reduction and hydrolysis processes to afford metallic M T 0 nanoparticles dispersed into the M T -BO 3 matrix. The composition and structural characteristics of these M T 0 :M T -BO 3 materials were identified by thermal oxidation, ATR-IR, X-ray powder diffraction, and magnetic techniques as glassy/amorphous borate matrices containing magnetic nanoparticles. The electrical conductivity (σ) of cold-pressed discs of these metal-doped composites shows that they behave as nonohmic semiconductors within the temperature range of 303 ≤ T ≤ 373 K suggesting a mixed electronic-ionic conduction. However, their thermal conductivity (κ) occurs through phonon lattice vibration dynamics rather than electronic. The σ/κ ratio shows a steep non-linear increase from 9.4 to 270 KV À2 in Ni 0 :Ni-BO 3 . In contrast, a moderate-weak increase is observed for Co 0 :Co-BO 3 and Fe 0 :Fe-BO 3 analogs. The obtained materials are examined for thermoelectric (TE) applications by determining their Seebeck coefficient (S) power factor (PF), figure of merit (ZT), and conversion efficiency (η%). All the TE data shows that Ni 0 :Ni-BO 3 (S, 80 μVK À1 ; PF, 97.7 mWm À1 K À1 ; ZT 0.54; η, 2.15%) is a better TE semiconductor than the other two M T 0 :M T -BO 3 . This finding shows that Ni 0 :Ni-BO 3 is a promising candidate to exploit low-temperature waste heat from body heat, sunshine, and small domestic devices for small-scale TE applications.

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“…There was no observable change in current values by changing the applied voltage before and after PIPA was doped, resulting in having a direct proportion between voltage and current as an evidence of ohmic resistance. Consequently, conductivity values were calculated to be 5.26 × 10 −6 and 5.27 × 10 −6 S cm −1 before and after iodine doping, respectively [22,23].…”

Section: Electrical Conductivitiesmentioning

confidence: 99%

Synthesis, Characterization, Electrical Conductivity and Fluorescence Properties of Polyimine Bearing Phenylacetylene Units

2016

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In this study, a Schiff base was synthesized by the condensation reaction of 4-bromobenzaldehyde and 4-aminophenol. Then, phenylacetylene substituted Schiff base monomer (IPA) was obtained by HBr elimination reaction of IPA with phenylacetylene through Sonogashira reaction. IPA was polymerized via chemical oxidative polycondensation reaction. FT-IR and NMR measurements were used for the structural analyses of the synthesized substances. Fluorescence and UV-Vis analyses were carried out for optical characterization. Electrochemical characteristics, electrical conductivities and thermal properties were determined using cyclic voltammetry (CV), four-point probe conductometer, TG-DTA and DSC methods. The main purpose of the present study was to investigate the effects of phenylacetylene bearing units on the properties of conjugated aromatic polyimines. The spectral analysis signified a green light emission behavior when irradiated at different wavelengths. Combined with fluorescent behavior and good thermal stability, the electrical conductivity was found to be very crucial for π-conjugated polymer.

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PdCl2–Polyaniline Composite for CO Detection Applications: Electrical and Optical Response

Cited by 8 publications

References 52 publications

Investigation of templated and supported polyaniline adsorbent materials

Investigation of templated and supported polyaniline adsorbent materials

Thermoelectric performance of Ni, Co, and Fe nanoparticles incorporated into their metal borates glassy matrices

Synthesis, Characterization, Electrical Conductivity and Fluorescence Properties of Polyimine Bearing Phenylacetylene Units

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