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Wet chemical controllable synthesis of hematite ellipsoids with structurally enhanced visible light property.

Han C, Han J, Li Q, Xie J - ScientificWorldJournal (2013)

Bottom Line: The results showed that the product was mesoporous α -Fe2O3 and nearly elliptical in shape.Each hematite ellipsoid was packed by many α -Fe2O3 nanoparticles.The formation of these porous hematite ellipsoids could be attributed to the vapor pressure induced oriented assembling of lots of α -Fe2O3 nanoparticles.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Material Engineering, Hefei University, Hefei 230601, China ; Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.

ABSTRACT
A facile and economic route has been presented for mass production of micro/nanostructured hematite microcrystals based on the wet chemical controllable method. The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-Vis absorption spectroscopy. The results showed that the product was mesoporous α -Fe2O3 and nearly elliptical in shape. Each hematite ellipsoid was packed by many α -Fe2O3 nanoparticles. The values of vapor pressure in reaction systems played vital roles in the formation of porous hematite ellipsoids. Optical tests demonstrated that the micro/nanostructured elliptical hematite exhibited enhanced visible light property at room temperature. The formation of these porous hematite ellipsoids could be attributed to the vapor pressure induced oriented assembling of lots of α -Fe2O3 nanoparticles.

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XRD patterns of the as-synthesized sample and standard α-Fe2O3 powder (the line spectrum).
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fig1: XRD patterns of the as-synthesized sample and standard α-Fe2O3 powder (the line spectrum).

Mentions: After Fe(OH)3 precursors in solution were heated at 453 K for 2 h in Teflon autoclave with the internal vapor 1.45 × 105 Pa or so, the red powders were collected by a centrifuge. The corresponding X-ray diffraction (XRD) was illustrated in Figure 1. It can be found that all the diffraction peaks can be indexed to pure α-Fe2O3 (JCPDS NO. 89-2810). The intense peaks of the XRD pattern indicate that the as-prepared powders were well-crystallized α-Fe2O3.


Wet chemical controllable synthesis of hematite ellipsoids with structurally enhanced visible light property.

Han C, Han J, Li Q, Xie J - ScientificWorldJournal (2013)

XRD patterns of the as-synthesized sample and standard α-Fe2O3 powder (the line spectrum).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3814095&req=5

fig1: XRD patterns of the as-synthesized sample and standard α-Fe2O3 powder (the line spectrum).
Mentions: After Fe(OH)3 precursors in solution were heated at 453 K for 2 h in Teflon autoclave with the internal vapor 1.45 × 105 Pa or so, the red powders were collected by a centrifuge. The corresponding X-ray diffraction (XRD) was illustrated in Figure 1. It can be found that all the diffraction peaks can be indexed to pure α-Fe2O3 (JCPDS NO. 89-2810). The intense peaks of the XRD pattern indicate that the as-prepared powders were well-crystallized α-Fe2O3.

Bottom Line: The results showed that the product was mesoporous α -Fe2O3 and nearly elliptical in shape.Each hematite ellipsoid was packed by many α -Fe2O3 nanoparticles.The formation of these porous hematite ellipsoids could be attributed to the vapor pressure induced oriented assembling of lots of α -Fe2O3 nanoparticles.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemical and Material Engineering, Hefei University, Hefei 230601, China ; Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China.

ABSTRACT
A facile and economic route has been presented for mass production of micro/nanostructured hematite microcrystals based on the wet chemical controllable method. The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and UV-Vis absorption spectroscopy. The results showed that the product was mesoporous α -Fe2O3 and nearly elliptical in shape. Each hematite ellipsoid was packed by many α -Fe2O3 nanoparticles. The values of vapor pressure in reaction systems played vital roles in the formation of porous hematite ellipsoids. Optical tests demonstrated that the micro/nanostructured elliptical hematite exhibited enhanced visible light property at room temperature. The formation of these porous hematite ellipsoids could be attributed to the vapor pressure induced oriented assembling of lots of α -Fe2O3 nanoparticles.

Show MeSH