Simultaneous synthesis of polyaniline nanorods and magnetite nanoparticles via self-assembly method

Abstract

In this work, polyaniline (PANI) nanorods and magnetite (Fe 3 O 4 ) nanoparticles have been synthesised by using ammonium persulphate as oxidant via in-situ chemical oxidative polymerisation of aniline in presence of excess of organic sulphonic acid. The resulting PANI/Fe 3 O 4 nanocomposites materials were characterised using X-ray diffraction, UV-visible spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, vibrating sampling magnetometer and thermogravimetric analysis. Spectroscopic results indicated the successful formation of PANI/Fe 3 O 4 nanocomposites. As obtained, PANI/ Fe 3 O 4 nanocomposites have Fe 3 O 4 particle size in the range of 3.2-7 nm. Morphologies of PANI/ Fe 3 O 4 nanocomposites were found to be dependent on the molar ratio of aniline to organic acid. Under certain polymerisation conditions, PANI rods like structures were obtained. PANI/Fe 3 O 4 nanocomposites have superparamagnetism and higher thermal stability.

Simultaneous Square Wave Voltammetric Detection of Endocrine-Disrupting Agents Using a Nanocomposite of Magnetic Fe3O4Nanorods and Poly(3,4-Methylenedioxy)aniline

“…35,36 The CC stretching mode of quinoid phenyl rings and the bending of N−H bond and the CC stretching modes of the benzenoid rings in MDAN represented the two peaks at 1615 and 1485 cm −1 , respectively. 30,37 The peak at 1265 cm −1 in MDAN was consistent with C−N stretching vibrations of secondary aromatic amine groups. 38 Also, the NQN stretching modes (where Q represents out-of-plane bending of para-substituted benzene ring) and the stretching mode of C−N groups in the quinoid rings of MDAN showed two peaks at 1191 and 1109 cm −1 , respectively.…”

“…38 Also, the NQN stretching modes (where Q represents out-of-plane bending of para-substituted benzene ring) and the stretching mode of C−N groups in the quinoid rings of MDAN showed two peaks at 1191 and 1109 cm −1 , respectively. 30,39,40 The wag vibration of N−H group 21 and the out-of-plane deformation of C−H in the 1,4-disubstituted benzene ring 41 in MDAN were observed in the emergence of the peak at around 799 cm −1 in the FTIR spectra of MDAN. As reported in previous studies, the presence of broad absorption bands higher than 2000 cm −1 in PMDAN and MNR-PMDAN indicated the presence of a conducting form of a polymer.…”

“…21 For both, MNR-PMDAN and PMDAN, polymers, the stretching modes of CC bond in the benzenoid phenyl rings were shown with a sharp band accompanied by a small shoulder peak at 1460 and 1483 cm −1 , respectively. 30,38 In addition, a sharp peak in PMDAN and a weak peak in MNR-PMDAN at ∼1381 cm −1 was assigned to the C−N bonding of the aromatic amine and verifies the existence of the 1,3,4-trisubstituted ring and/or the presence of the phenazine structure. 42 Moreover, the phenazine units were reported to function as initiation centers during the polyaniline synthesis.…”

“…However, according to previous research, these limitations can be resolved by encapsulating or coating the Fe 3 O 4 nanoparticles in a conducting polymer such as polyaniline, which can also serve as a platform for additional functionalization. 20,30 To the best of our knowledge, we have reported the in situ green and sustainable mechanosynthesis along with an organic solvent-free co-precipitation method directly from MDAN, Fe(III) chloride, and NaOH to form a poly(MDAN) (PMDAN) nanocomposite in the presence of magnetite…”

Polyaniline-Based Nanocomposites for Environmental Remediation

“…Similar method was used for the synthesis of PANI-zinc oxide (ZnO) nanocomposites with enhanced electrical conductivity and homogeneous distribution on ZnO nanoparticles in the polymer matrix [38]. Basavaiah et al [39] prepared polyaniline nanorods and magnetite nanoparticles via self-assembly route. Table 1 shows some of the PANI based nanocomposites reported for the removal of pollutants from wastewater.…”