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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.


FE-SEM images of α-Fe2O3 with diverse shapes prepared at different ion concentrations. (a) a in Table 2; (b, c) b in Table 2; (d) d in Table 2.
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Fig7: FE-SEM images of α-Fe2O3 with diverse shapes prepared at different ion concentrations. (a) a in Table 2; (b, c) b in Table 2; (d) d in Table 2.

Mentions: α-Fe2O3 with diverse shapes was prepared from the same calcination process due to the different ion concentrations in hydrothermal reaction as shown in Table 2. In Figure 7, when the ion concentration is low, continuous fibers of interconnected nanorods were approached (Figure 7a), similar to the reported work [11]. When Fe3+ ion content increases to 21.1 μmol, novel hollow α-Fe2O3 nanofibers made of rice-like nanorods were prepared as shown in a representative high-resolution FE-SEM image (Figure 7b). In Figure 7c, hollow structure of α-Fe2O3 nanofibers can be clearly seen and abundant rice-like nanorods with the mean size of 60 ± 17 nm can be found. The hollow α-Fe2O3 nanofibers with hierarchical structure will find wide applications in photocatalyst, heavy metal ion detection, and lithium-ion battery due to the specific structure. However, tenfold increase in ion concentration resulted in only aggregates of α-Fe2O3 nanoparticles without fibrous morphology.Table 2


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

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

FE-SEM images of α-Fe2O3 with diverse shapes prepared at different ion concentrations. (a) a in Table 2; (b, c) b in Table 2; (d) d in Table 2.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig7: FE-SEM images of α-Fe2O3 with diverse shapes prepared at different ion concentrations. (a) a in Table 2; (b, c) b in Table 2; (d) d in Table 2.
Mentions: α-Fe2O3 with diverse shapes was prepared from the same calcination process due to the different ion concentrations in hydrothermal reaction as shown in Table 2. In Figure 7, when the ion concentration is low, continuous fibers of interconnected nanorods were approached (Figure 7a), similar to the reported work [11]. When Fe3+ ion content increases to 21.1 μmol, novel hollow α-Fe2O3 nanofibers made of rice-like nanorods were prepared as shown in a representative high-resolution FE-SEM image (Figure 7b). In Figure 7c, hollow structure of α-Fe2O3 nanofibers can be clearly seen and abundant rice-like nanorods with the mean size of 60 ± 17 nm can be found. The hollow α-Fe2O3 nanofibers with hierarchical structure will find wide applications in photocatalyst, heavy metal ion detection, and lithium-ion battery due to the specific structure. However, tenfold increase in ion concentration resulted in only aggregates of α-Fe2O3 nanoparticles without fibrous morphology.Table 2

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.