Synergistic effect of gold nanoparticles decorated functionalized carbon nanotubes nanohybrids on the thermal, dielectric, and sensing properties of polyaniline ternary nanocomposites

• Published in: Journal of applied polymer science 2024-07, Vol.141 (27), p.n/a
• Main Authors: Shubhadarshinee, Lipsa, Mohapatra, Pooja, Behera, Shreelata, Jali, Bigyan Ranjan, Barick, Aruna Kumar, Mohapatra, Priyaranjan
• Format: Article
• Language: English
• Subjects: Aqueous solutions; Dielectric loss; Electrons; Field emission microscopy; Field emission spectroscopy; Fourier transforms; Gold; gold nanoparticles; Heavy metals; hybrid nanofillers; Infrared analysis; Infrared spectroscopy; Multi wall carbon nanotubes; multi‐walled carbon nanotubes; Nanocomposites; Nanoparticles; Photoelectrons; polyaniline; Polyanilines; polymer nanocomposites; Raman spectroscopy; single‐walled carbon nanotubes; Spectrum analysis; Synergistic effect; Thermal stability; thermal, dielectric, and sensing properties
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.55611

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. Synthesis of PANI/Au@f‐CNTs ternary nanocomposites using an in situ polymerization approach: Evaluation of thermal, dielectric, and sensing properties.