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Highly uniform ac conductivity and dielectric permittivity of poly(aniline-co–o-nitroaniline) (PA-co-o-NA)s have been recorded by using electrochemical impedance spectroscopy in the frequency range of 10–2–107 Hz. Also, the unusual electrical behavior of PA-co-o-NA80 at low frequencies has been noticed. X-ray diffraction and differential thermal an...
Citations
The synthesis of gold nanoparticles reinforced functionalized single‐walled/multi‐walled carbon nanotubes nanohybrid based polyaniline nanocomposites were carried out using in situ polymerization. The chemical interaction and nanostructured morphology of the synthesized nanocomposites are studied using ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, x‐ray diffraction analysis, x‐ray photoelectron spectroscopy, and field emission scanning electron microscopy. Thermal stability of synthesized PANI/Au@f‐SWNTs is boosted by a magnitude of 30°C as compared with the pristine PANI matrix, which is attributed to a strong barrier effect because of the development of tortuous path that resulted from a uniform distribution of Au@f‐CNTs throughout the PANI matrix. For PANI/Au@f‐SWNTs, the AC conductivity and dielectric permittivity are improved by a value of 83.58 S/cm and 1.35 × 10⁻⁵ as well as the dielectric loss is reduced by a factor of 0.11 in comparison with the pure PANI matrix at an applied frequency of 10⁶ Hz. PANI/Au@f‐SWNTs and PANI/Au@f‐MWNTs ternary nanocomposites exhibited excellent selectivity toward the hazardous Cr(VI) heavy metal ions in an aqueous medium with a limit of detection of 0.74 and 0.89 μM with a binding constant of 1.028 × 10⁵ and 3.46 × 10⁴ M⁻¹, respectively, that can be selective and sensitive for the detection of Cr(VI) metal ions in water at trace level.
Polyaniline (PANI) is one of the important of the conducting polymers because of its easy synthesis, redox recyclability, reversible proton dopability, environmental stability, cost-effectiveness and reasonable electrical conductivity. PANI and its composites have the most promising applications as conducting materials in optoelectronics and microelectronics devices. Recently, PANI composite studies have increased remarkably in order to overcome the negative properties of polyaniline. In this study, 2-Aminophenol as monomer was polymerized oxidatively in the presence of ammonium persulfate as oxidant to obtain poly(2-aminophenol) (P2AMP). Then, 2-Aminophenol was polymerized in the presence of difference weight percentage (1%, 2%, 5%) of Boron nitride and graphite to obtain its composites (P2AMP-BN and P2AMP-GH), respectively. These composites were characterized by using spectroscopic, morphologic and physical methods.
