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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.


Adsorption curves and kinetics of hollow α-Fe2O3 fibers made of rice-like nanorods to MO. Different initial MO concentrations (a, c) and temperatures (b, d).
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Fig9: Adsorption curves and kinetics of hollow α-Fe2O3 fibers made of rice-like nanorods to MO. Different initial MO concentrations (a, c) and temperatures (b, d).

Mentions: Recently, environmental cleanup has been one of the most active areas in photocatalysis. An ideal photocatalyst should be stable, inexpensive, nontoxic, and, of course, highly photoactive [30]. Fe2O3 stands out with its nearly ideal bandgap of 2.2 eV and its high photochemical stability in aqueous solutions [31]. Yu et al. reported that degradation pathways of MO by using well-defined α-Fe2O3 nanocrystals involve both N-demethylation and the cleavage of conjugated chromophores [23]. To clear the adsorption kinetics of MO by using hollow α-Fe2O3 nanofibers made of rice-like nanorods, the effects of initial MO concentration and temperature were investigated systematically. As shown in Figure 9, at lower initial MO concentration (Figure 9a) or higher temperature (Figure 9b), better MO degradation performance was observed. Lagergren pseudo-second-order kinetic model was adopted to describe the adsorption process. k2 is the adsorption rate constant, Qe is the equilibrium absorption capacity:Figure 9


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

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

Adsorption curves and kinetics of hollow α-Fe2O3 fibers made of rice-like nanorods to MO. Different initial MO concentrations (a, c) and temperatures (b, d).
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig9: Adsorption curves and kinetics of hollow α-Fe2O3 fibers made of rice-like nanorods to MO. Different initial MO concentrations (a, c) and temperatures (b, d).
Mentions: Recently, environmental cleanup has been one of the most active areas in photocatalysis. An ideal photocatalyst should be stable, inexpensive, nontoxic, and, of course, highly photoactive [30]. Fe2O3 stands out with its nearly ideal bandgap of 2.2 eV and its high photochemical stability in aqueous solutions [31]. Yu et al. reported that degradation pathways of MO by using well-defined α-Fe2O3 nanocrystals involve both N-demethylation and the cleavage of conjugated chromophores [23]. To clear the adsorption kinetics of MO by using hollow α-Fe2O3 nanofibers made of rice-like nanorods, the effects of initial MO concentration and temperature were investigated systematically. As shown in Figure 9, at lower initial MO concentration (Figure 9a) or higher temperature (Figure 9b), better MO degradation performance was observed. Lagergren pseudo-second-order kinetic model was adopted to describe the adsorption process. k2 is the adsorption rate constant, Qe is the equilibrium absorption capacity:Figure 9

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.