Synthesis and Characterization of Novel Coralloid Polyaniline/BaFe₁₂O₁₉ Nanocomposites

Abstract

By supplying inorganic ferrite nanoparticles of different morphologies as nucleation sites, PANI/ferrite nanocomposites with novel coralloid structures were synthesized successfully through a simple, conventional, and inexpensive one-step in situ polymerization method without the aid of any surfactant, organic dopant, or template. As shown by XRD, FT-IR and UV-vis, there is no obvious chemical interaction between PANI and BaFe 12 O 19 (BF) nanoparticles; that is, ferrite nanoparticles served only as the nucleation centers for the growth of PANI nanofibers, whereas the nanoparticles have an effect in reducing the diameters of the produced PANI nanofibers. PANI/BF nanocomposites are hard magnetic properties with alternative electrical conductivities and magnetic properties. The reflection loss of BF nanoparticles in 2-18 GHz was essentially enhanced upon PANI coating, and the frequency relating to maximum reflection loss shifts to a higher value with the increase in BF content because of the higher anisotropy field. With controllable electrical, magnetic, and electromagnetic properties, the prepared nanocomposites may have potential applications in chemical sensors, gas separation, catalysis, microwave absorbing, and magnetoelectric devices.

Synthesis of hollow poly(aniline-co-pyrrole)–Fe3O4 composite nanospheres and their microwave absorption behavior

“…is about -3 dB at 9 GHz and 10 GHz when d=2 mm, which is higher than other reported results [29,35]. As the Fe 3 O 4 content increases, the reflection loss peaks shift slightly towards higher frequency, which is consistent with previous reports [36]. Additionally, the magnetic and conductivity properties are enhanced by increasing the Fe 3 O 4 content, as shown in Fig.…”

Facile Synthesis of Polyaniline‐Polypyrrole Nanofibers for Application in Chemical Deposition of Metal Nanoparticles

“…As shown in Figure 2a, the absorption peak attributed to the p-p à transition of the benzenoid ring at 326 nm becomes weaker with a decrease in the PANI component in the PANI-PPy nanofibers. [17] The absorption corresponding to the benzenoid-quinoid excitonic transition is located at 625 nm for pure PANI, which displays an obvious negative shift with the increase in the PPy component, and interestingly transforms to a unique absorption at 454 nm due to the polaron-p transition for PANI-PPy from equimolar An and Py. [18] Like pure PPy, no evident absorption was found for PANI-PPy nanofibers from [An:Py] ¼ 1:3 and 1:9 during 400-800 nm.…”

“…) are considerably lower than the homopolymers, [17,20] and a first order exponential decay as a function of PPy content was displayed (see Supporting Information). It was recognized that metal ions having a reduction potential higher than that of the PANI can be reduced to form metal elements.…”

Remarkable magnetic enhancement of type-M hexaferrite of barium in polystyrene polymer

“…The authors have used BaM / PS in 2/1 weight ratio because this weight ratio is optimum for magnetic properties as verified in previous works of ferrite-polymer composites. [21][22][23] The BaM-PS composite at BaM/PS weight ratio 2/1 was formed by mixing 3.0 g BaM and 1.50 g PS (Sigma-Aldrich) in 10.0 mL m-cresol (Aldrich, 98%). The solution was being stirring at room temperature.…”