Aniline dimer–COOH assisted preparation of well-dispersed polyaniline–Fe 3 O 4 nanoparticles
2005; IOP Publishing; Volume: 16; Issue: 9 Linguagem: Inglês
10.1088/0957-4484/16/9/043
ISSN1361-6528
AutoresXiaofeng Lu, Youhai Yu, Liang Chen, Huaping Mao, Han Gao, Jue Wang, Wanjin Zhang, Yen Wei,
Tópico(s)Advanced Sensor and Energy Harvesting Materials
ResumoPolyaniline (PANI)–Fe3O4 nanoparticles were obtained using a novel method: aniline dimer–COOH assisted polymerization. The synthetic strategy involved two steps: first, the composite of magnetic nanoparticles modified with aniline dimer–COOH was synthesized by a chemical precipitation method. Then aniline monomer and oxidant were added to create PANI–Fe3O4 nanoparticles. The structure of Fe3O4 nanoparticles capped with aniline dimer–COOH was characterized by Fourier transform infrared, ultraviolet–visible, x-ray photoelectron spectroscopy and x-ray diffraction analyses. Transmission electron microscope images of the PANI–Fe3O4 nanocomposite showed that the Fe3O4 nanoparticles were well dispersed in PANI matrices. The PANI–Fe3O4 composite was characterized by means of FTIR, XPS and XRD analyses. The PANI–Fe3O4 nanoparticles were found to be superparamagnetic. The hysteresis loop at room temperature showed high saturated magnetization (Ms = 21 emu g−1) and a low coercive force (μc = 0).
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