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

• Published in: Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology Vol. 15; no. 10; p. 1988
• Main Authors: Zhu, Yao-Feng, Ni, Qing-Qing, Fu, Ya-Qin, Natsuki, Toshiaki
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2013; Springer
• Subjects: Catalytic methods; Characterization and Evaluation of Materials; Chemistry and Materials Science; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Inorganic Chemistry; Lasers; Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties; Materials Science; Methods of nanofabrication; Nanocrystalline materials; Nanoscale materials and structures: fabrication and characterization; Nanotechnology; Optical Devices; Optics; Photonics; Physical Chemistry; Physics; Research Paper; Self-assembly; Surfaces and interfaces; thin films and whiskers (structure and nonelectronic properties); Polyelectrolyte; nanoparticles; Microwave absorption; Polyaniline hollow sphere; Nanocomposite; Fe; O; Fourier transform spectroscopy; Thermogravimetry; Field emission; XRD; Electron microscopy; Nanoparticles; Hollow sphere; Self-assembly; Nanocomposites; Morphology; Bandwidth; Scanning transmission electron microscopy; Electrostatics; Nanostructured materials; Saturation magnetization; X-ray photoelectron spectra
• ISSN: 1388-0764; 1572-896X
• DOI: 10.1007/s11051-013-1988-4

Highly regulated Fe 3 O 4 –polyelectrolyte-modified polyaniline (Fe 3 O 4 –PE@PANI) hollow sphere nanocomposites were successfully synthesized using an electrostatic self-assembly approach. The morphology and structure of the Fe 3 O 4 –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 Fe 3 O 4 –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 Fe 3 O 4 –PE@PANI nanocomposites are, therefore, promising for microwave absorption applications.