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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.


XRD (a) and EDS (b) patterns of the calcined product prepared at 600°C for 4 h under air.
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Fig5: XRD (a) and EDS (b) patterns of the calcined product prepared at 600°C for 4 h under air.

Mentions: Figure 5a shows the XRD pattern of the calcined product prepared at 600°C for 4 h under air. The diffraction peaks at 2θ of 24.1°, 33.2°, 35.6°, 40.8°, 49.4°, 54.1°, 57.6°, 62.4°, and 64.0° correspond to (012), (104), (110), (006), (024), (116), (018), (214), and (300) crystallographic planes of hematite structure of α-Fe2O3 by comparison with JCPDS card files number 87-1166 (a = 5.038 Å, c = 13.756 Å) [27]. The strong and sharp diffraction peaks indicate good crystallinity of the calcined product. No characteristic peaks from impurities are detected. The formation of Fe2O3 was further confirmed by EDS pattern (Figure 5b) of the calcined product. Fe and O peaks can be clearly seen.Figure 5


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

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

XRD (a) and EDS (b) patterns of the calcined product prepared at 600°C for 4 h under air.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig5: XRD (a) and EDS (b) patterns of the calcined product prepared at 600°C for 4 h under air.
Mentions: Figure 5a shows the XRD pattern of the calcined product prepared at 600°C for 4 h under air. The diffraction peaks at 2θ of 24.1°, 33.2°, 35.6°, 40.8°, 49.4°, 54.1°, 57.6°, 62.4°, and 64.0° correspond to (012), (104), (110), (006), (024), (116), (018), (214), and (300) crystallographic planes of hematite structure of α-Fe2O3 by comparison with JCPDS card files number 87-1166 (a = 5.038 Å, c = 13.756 Å) [27]. The strong and sharp diffraction peaks indicate good crystallinity of the calcined product. No characteristic peaks from impurities are detected. The formation of Fe2O3 was further confirmed by EDS pattern (Figure 5b) of the calcined product. Fe and O peaks can be clearly seen.Figure 5

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.