Synthesis and microwave absorption properties of electromagnetic functionalized Fe3O4–polyaniline hollow sphere nanocomposites produced by electrostatic self-assembly

Abstract

Highly regulated Fe3O4–polyelectrolyte-modified polyaniline (Fe3O4–PE@PANI) hollow sphere nanocomposites were successfully synthesized using an electrostatic self-assembly approach. The morphology and structure of the Fe3O4–PE@PANI nanocomposites were characterized using field-emission scanning electron microscopy, transmission electron microscopy, Fourier-transform infrared spectroscopy, X-ray powder diffraction, thermogravimetric analysis, and X-ray photoelectron spectroscopy. The results showed that the as-prepared nanocomposites had well-defined sizes and shapes, and the average size is about 500 nm. The assembly process was investigated. Magnetization measurements showed that the saturation magnetization of the nanocomposites was 38.6 emu g−1. It was also found that the Fe3O4–PE@PANI nanocomposites exhibited excellent reflection loss abilities and wide response bandwidths compared with those of PANI hollow spheres in the range 0.5–15 GHz. The Fe3O4–PE@PANI nanocomposites are, therefore, promising for microwave absorption applications.

Hollow Polyaniline Microsphere/Fe3O4 Nanocomposite as an Effective Adsorbent for Removal of Arsenic from Water

“…Accordingly, PANI hybrids such as PANI/Polystyrene 26 , PANI/Rice husk 27 have successfully been used in the separation of arsenic from water. The choice of PANI in these works is mainly guided by its lightweight, easy processability, flexibility, and excellent environmental stability 28 . However, separation of PANI powder absorbents is tedious and costly, owing to its intrinsic hydrophilicity 29 .…”

“…Therefore, it is desirable to develop a polyaniline based magnetic adsorbents for the effective removal of arsenic and its easy separation after use 25,29,30 . Recently, the hollow morphology of PANI has been receiving considerable attention for multifaceted applications 28,[31][32][33] . These are mainly ascribed to its porous structure, low effective density, lightweight, strong filling ability, chemical interest, thermal resistance, and reduced mass density 34 .…”

Ultrasound-Assisted Catalytic Degradation of Methyl Orange with Fe3O4/Polyaniline in Near Neutral Solution

“…In fact, the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 isoelectric points for PANI and PANI-containing composites are highly dependent on doping agent and doping concentration. 40 In this research, we find that the testing procedure has a notable effect on the isoelectric point values for PANI and PANI-coated composite, due to the doping/dedoping mechanism related to semiconducting polymers. According to reference, 41 the sol of particles were firstly diluted to a designated volume, followed by addition of HNO 3 /NaOH to tune the solution pH.…”

“…39,40 The surfacecharge characteristics of solid particles can be deduced from their zeta potential plots. In fact, the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 isoelectric points for PANI and PANI-containing composites are highly dependent on doping agent and doping concentration.…”

Radar Absorption Performance of Fe3O4/AC/PANI Nanocomposites Prepared from Natural Iron Sand

“…Thus, this material has extremely decent potential as RAM that is compiled with Fe3O4 nanoparticles. With regard to this fact, a previous study has also succeeded in synthesizing RAM based on Fe3O4/PANI composites with reflection loss (RL) values of less than -10 dB [17]. However, for special applications that require high absorption, to refine the performance of the Fe3O4/PANI composites in radarabsorbing is needed.…”