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Novel hollow α-Fe2O3 nanofibers via electrospinning for dye adsorption.

Gao Q, Luo J, Wang X, Gao C, Ge M - Nanoscale Res Lett (2015)

Bottom Line: In this work, hollow α-Fe2O3 nanofibers made of rice-like nanorods were successfully synthesized via a simple hydrothermal reaction on polyvinyl alcohol (PVA) nanofiber template followed by calcination.The crystallographic structure and the morphology of the as-prepared α-Fe2O3 nanofibers were characterized by X-ray diffraction, energy dispersive X-ray spectrometer, and scanning electron microscope.This work provided a versatile strategy for further design and development of functional nanofiber-nanoparticle composites towards various applications.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, 214122 China ; State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, 220 Handan Road, Shanghai, 200438 China.

ABSTRACT
Nanomaterials such as iron oxides and ferrites have been intensively investigated for water treatment and environmental remediation applications. In this work, hollow α-Fe2O3 nanofibers made of rice-like nanorods were successfully synthesized via a simple hydrothermal reaction on polyvinyl alcohol (PVA) nanofiber template followed by calcination. The crystallographic structure and the morphology of the as-prepared α-Fe2O3 nanofibers were characterized by X-ray diffraction, energy dispersive X-ray spectrometer, and scanning electron microscope. Batch adsorption experiments were conducted, and ultraviolet-visible spectra were recorded before and after the adsorption to investigate the dye adsorption performance. The results showed that hollow α-Fe2O3 fiber assembles exhibited good magnetic responsive performance, as well as efficient adsorption for methyl orange in water. This work provided a versatile strategy for further design and development of functional nanofiber-nanoparticle composites towards various applications.

No MeSH data available.


M-H curves and the adsorption capacity of MO of hollow α-Fe2O3 nanofibers. Magnetic hysteresis loops of α-Fe2O3 fibers measured at 300 K and the C/C0 versus time plots for adsorption of MO solution using (a) solid fibers and (b) hollow fibers made of rice-like nanorods; the inset shows the magnetic response of hollow α-Fe2O3 fibers made of rice-like nanorods after adsorption of MO for 15 min.
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Fig8: M-H curves and the adsorption capacity of MO of hollow α-Fe2O3 nanofibers. Magnetic hysteresis loops of α-Fe2O3 fibers measured at 300 K and the C/C0 versus time plots for adsorption of MO solution using (a) solid fibers and (b) hollow fibers made of rice-like nanorods; the inset shows the magnetic response of hollow α-Fe2O3 fibers made of rice-like nanorods after adsorption of MO for 15 min.

Mentions: Nanostructured α-Fe2O3 displays weak ferromagnetic behavior at room temperature [28]. The M-H curves revealed in Figure 8 show a nonlinear and reversible behavior with a weak magnetic hysteresis loop. This was related to the fine crystallite sizes of α-Fe2O3 nanorods. The as-prepared hollow α-Fe2O3 nanofibers made of rice-like nanorods (Figure 7b) exhibited a robust saturation magnetization of 24.4 emu∙g−1, higher than 10.2 emu∙g−1 of solid fibers (Figure 7a) and that in the reported work [29], which should be ascribed to the hollow fiber structure and well-defined rice-like shape of α-Fe2O3.Figure 8


Novel hollow α-Fe2O3 nanofibers via electrospinning for dye adsorption.

Gao Q, Luo J, Wang X, Gao C, Ge M - Nanoscale Res Lett (2015)

M-H curves and the adsorption capacity of MO of hollow α-Fe2O3 nanofibers. Magnetic hysteresis loops of α-Fe2O3 fibers measured at 300 K and the C/C0 versus time plots for adsorption of MO solution using (a) solid fibers and (b) hollow fibers made of rice-like nanorods; the inset shows the magnetic response of hollow α-Fe2O3 fibers made of rice-like nanorods after adsorption of MO for 15 min.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4401480&req=5

Fig8: M-H curves and the adsorption capacity of MO of hollow α-Fe2O3 nanofibers. Magnetic hysteresis loops of α-Fe2O3 fibers measured at 300 K and the C/C0 versus time plots for adsorption of MO solution using (a) solid fibers and (b) hollow fibers made of rice-like nanorods; the inset shows the magnetic response of hollow α-Fe2O3 fibers made of rice-like nanorods after adsorption of MO for 15 min.
Mentions: Nanostructured α-Fe2O3 displays weak ferromagnetic behavior at room temperature [28]. The M-H curves revealed in Figure 8 show a nonlinear and reversible behavior with a weak magnetic hysteresis loop. This was related to the fine crystallite sizes of α-Fe2O3 nanorods. The as-prepared hollow α-Fe2O3 nanofibers made of rice-like nanorods (Figure 7b) exhibited a robust saturation magnetization of 24.4 emu∙g−1, higher than 10.2 emu∙g−1 of solid fibers (Figure 7a) and that in the reported work [29], which should be ascribed to the hollow fiber structure and well-defined rice-like shape of α-Fe2O3.Figure 8

Bottom Line: In this work, hollow α-Fe2O3 nanofibers made of rice-like nanorods were successfully synthesized via a simple hydrothermal reaction on polyvinyl alcohol (PVA) nanofiber template followed by calcination.The crystallographic structure and the morphology of the as-prepared α-Fe2O3 nanofibers were characterized by X-ray diffraction, energy dispersive X-ray spectrometer, and scanning electron microscope.This work provided a versatile strategy for further design and development of functional nanofiber-nanoparticle composites towards various applications.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, 214122 China ; State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science and Laboratory of Advanced Materials, Fudan University, 220 Handan Road, Shanghai, 200438 China.

ABSTRACT
Nanomaterials such as iron oxides and ferrites have been intensively investigated for water treatment and environmental remediation applications. In this work, hollow α-Fe2O3 nanofibers made of rice-like nanorods were successfully synthesized via a simple hydrothermal reaction on polyvinyl alcohol (PVA) nanofiber template followed by calcination. The crystallographic structure and the morphology of the as-prepared α-Fe2O3 nanofibers were characterized by X-ray diffraction, energy dispersive X-ray spectrometer, and scanning electron microscope. Batch adsorption experiments were conducted, and ultraviolet-visible spectra were recorded before and after the adsorption to investigate the dye adsorption performance. The results showed that hollow α-Fe2O3 fiber assembles exhibited good magnetic responsive performance, as well as efficient adsorption for methyl orange in water. This work provided a versatile strategy for further design and development of functional nanofiber-nanoparticle composites towards various applications.

No MeSH data available.