Core–shell structured Fe3O4/PANI microspheres and their Cr(VI) ion removal properties

Han, Xijiang; Gai, Ligang; Jiang, Haihui; Zhao, Lichun; Liu, Hong; Zhang, Wei

doi:10.1016/j.synthmet.2013.02.025

Cited by 82 publications

(29 citation statements)

References 29 publications

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“…SEM images in Figure 2 present formed. This proves that acidification is essential for preparing the Fe 3 O 4 @PANI structure and those other surfactants are unnecessary [20]. Further composition was analyzed by SEM-EDS spectra.…”

Section: Resultsmentioning

confidence: 90%

“…30 min period. The mixture was stirred vigorously in a nitrogen atmosphere for 8 h. Finally, the resulting product was collected magnetically and washed with ethanol and distilled water [20]. To prevent dielectric breakdown under applied high electric field strength, we dedoped the particles using 1 M NaOH solution as follows.…”

Section: Experimental 21 Materials and Preparationmentioning

confidence: 99%

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Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Sim¹,

Chae²,

Choi³

2015

Express Polym. Lett.

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Abstract. Polyaniline (PANI)-coated iron oxide (Fe 3 O 4 ) sphere particles were fabricated and applied to a dual stimuliresponsive material under electric and magnetic fields, respectively. Sphere Fe 3 O 4 particles were synthesized by a solvothermal process and protonated after acidification. The aniline monomer tended to surround the surface of the Fe 3 O 4 core due to the electrostatic and hydrogen bond interactions. A core-shell structured product was finally formed by the oxidation polymerization of PANI on the surface of Fe 3 O 4 . The formation of Fe 3 O 4 @PANI particles was examined by scanning electron microscope and transmission electron microscope. The bond between Fe 3 O 4 and PANI was confirmed by Fourier transform-infrared spectroscope and magnetic properties were analyzed by vibration sample magnetometer. A hybrid of a conducting and magnetic particle-based suspension displayed dual stimuli-response under electric and magnetic fields. The suspension exhibited typical electrorheological and magnetorheological behaviors of the shear stress, shear viscosity and dynamic yield stress, as determined using a rotational rheometer. Sedimentation stability was also compared between Fe 3 O 4 and Fe 3 O 4 @PANI suspension.

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Section: Resultsmentioning

confidence: 90%

Section: Experimental 21 Materials and Preparationmentioning

confidence: 99%

Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Sim¹,

Chae²,

Choi³

2015

Express Polym. Lett.

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show abstract

“…88-0866. 10 These diffraction peaks of Fe3O4/PANI sample were similar with those of bare magnetic particles, indicating that the coating Fe3O4 nanoparticles by polyaniline composites polymer did not cause the decrease its crystallization. The results from XRD and FT-IR analyses confirm that the St-PANI/Fe3O4 composite was successfully synthesized with constituents of polyaniline, Fe3O4 and starch.…”

Section: Resultsmentioning

confidence: 66%

“…The similar results were also observed previously. 10,18 It is well-known that the composite particles with magnetic property can be recovered from an aqueous solution with an external magnet. …”

Section: Resultsmentioning

confidence: 99%

“…PANI polymer composite has been studied for adsorption of heavy metal and textile dyes. [10][11][12][13] Starch and its composite have many useful features such as biocompatibility and biodegradability property. 14,15 Starch/polyaniline and chitosan/polyaniline composites were prepared for enhanced removal of textile dyes from the synthetic effluent.…”

Section: Introductionmentioning

confidence: 99%

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"REUSABLE STARCH-GRAFT-POLYANILINE/Fe3O4 COMPOSITE FOR REMOVAL OF TEXTILE DYES"

2017

RJC

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Magnetic composite materials have been considered as one of the promising candidates for wastewater treatment. In this paper, the starch-g-polyaniline/Fe3O4 (St-PANI/Fe3O4) composite particles were prepared successfully via chemical oxidation polymerization of aniline and starch with ammonium peroxydisulfate as a catalyst. The characterization of prepared composite materials was investigated by Fourier Transform Infrared Spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), Vibrating Sample Magnetometer (VSM), and Thermo Gravimetric Analysis (TGA) techniques. The composite materials were used for removal of textile dyes from aqueous solutions. The effect of various factors to adsorption capacities such as initial dye concentrations (50-200 mg/L), adsorbent amount, pH of the medium (3, 5, 7 and 9), and contact times were also investigated. The results showed that these composite materials had the high feasibility removal of anionic dyes, but low efficiency for cationic dyes in an aqueous solution. The absorption yields were strongly affected by the dye concentrations, adsorbent amount, contact time and pH. In addition, the composite can be collected easily from an aqueous solution and recycled after usage with the help of an external magnet due to the magnetic property.

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Synthesis of hollow spherical polyaniline by using poly(styrene‐co‐acrylic acid) sphere as the template for high adsorption of Cr(VI)

Chang

Meng

Liu

et al. 2022

J of Applied Polymer Sci

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Synthesis of hollow spherical polyaniline (HSPANI) with the merits of facile strategy, low cost, low safety risk and high adsorption capacity of Cr(VI) is always a big challenge. In this manuscript, we proposed a facile way to preparation of HSPANI by using the poly(styrene‐co‐acrylic acid) sphere as template. The results indicated that HSPANI was emeraldine comprised of lots of basically uniform hollow spheres, and its average pore diameter was about 300 nm. HSPANI displayed high adsorption capacity of Cr(VI), and its value arrived at 601.3, 347.8, 235 mg g−1 at pH = 1, 2, and 3, respectively, which were high than many other adsorbents. The endothermic, spontaneous and chemical adsorption process was responsible for this adsorption. The Cr(VI) adsorption capacity was significant relied on its pH, contact time, Cr(VI) concentration and adsorption temperature. The adsorption behavior was well agreed with pseudo second‐order equation and Redlich–Peterson isotherm models. HSPANI exhibited remarkable selectivity for adsorption of Cr(VI) even if the K+, Cu2+, NO3− and SO42− were coexisted. HSPANI also displayed excellent regeneration performance. Therefore, this work not only provided a facile way to synthesis of hollow spherical polyaniline, but also supplied a potential adsorbent for adsorption of Cr(VI) from the industrial wastewater.

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Core–shell structured Fe3O4/PANI microspheres and their Cr(VI) ion removal properties

Cited by 82 publications

References 29 publications

Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

Fabrication of polyaniline coated iron oxide hybrid particles and their dual stimuli-response under electric and magnetic fields

"REUSABLE STARCH-GRAFT-POLYANILINE/Fe3O4 COMPOSITE FOR REMOVAL OF TEXTILE DYES"

Synthesis of hollow spherical polyaniline by using poly(styrene‐co‐acrylic acid) sphere as the template for high adsorption of Cr(VI)

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