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One-pot synthesis of α-Fe2O3 nanospheres by solvothermal method.

Wang C, Cui Y, Tang K - Nanoscale Res Lett (2013)

Bottom Line: We have successfully prepared α-Fe2O3 nanospheres by solvothermal method using 2-butanone and water mixture solvent for the first time, which were about 100 nm in diameter and composed of very small nanoparticles.The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy.The results showed that the product was α-Fe2O3 nanosphere, and the temperature was an important factor on the formation of α-Fe2O3 nanospheres.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, 230026, People's Republic of China. kbtang@ustc.edu.cn.

ABSTRACT
We have successfully prepared α-Fe2O3 nanospheres by solvothermal method using 2-butanone and water mixture solvent for the first time, which were about 100 nm in diameter and composed of very small nanoparticles. The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the product was α-Fe2O3 nanosphere, and the temperature was an important factor on the formation of α-Fe2O3 nanospheres.

No MeSH data available.


Image of a single sphere. (a) TEM image and (b) HRTEM image. Inset shows the corresponding SAED image from the marked part in (a).
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Figure 4: Image of a single sphere. (a) TEM image and (b) HRTEM image. Inset shows the corresponding SAED image from the marked part in (a).

Mentions: To further investigate the particular structure of the α-Fe2O3 nanospheres, the HRTEM images of the typical sample are demonstrated in Figure 4. It can be clearly observed that a lot of gaps exist in the product, and the average diameter of the nanoparticles is about 25 nm (Figure 4a). In fact, we can estimate the size of the crystalline grains by Scherrer formula as well. Based on the typical reflection of the (104) crystalline plane (Figure 1), the crystallite size was calculated to be about 27 nm. Obviously, the two results are almost the same. The HRTEM image shows resolved lattice fringes of (104) and (110) planes with a spacing of almost 0.27 and 0.25 nm (Figure 4b), consistent with the XRD results. The inset in Figure 4a shows the SAED pattern taken from the marked part, which can be indexed to a rhombohedral hexagonal phase (space group ) with lattice constants a = 0.5035 nm and c = 1.3747 nm.


One-pot synthesis of α-Fe2O3 nanospheres by solvothermal method.

Wang C, Cui Y, Tang K - Nanoscale Res Lett (2013)

Image of a single sphere. (a) TEM image and (b) HRTEM image. Inset shows the corresponding SAED image from the marked part in (a).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3649940&req=5

Figure 4: Image of a single sphere. (a) TEM image and (b) HRTEM image. Inset shows the corresponding SAED image from the marked part in (a).
Mentions: To further investigate the particular structure of the α-Fe2O3 nanospheres, the HRTEM images of the typical sample are demonstrated in Figure 4. It can be clearly observed that a lot of gaps exist in the product, and the average diameter of the nanoparticles is about 25 nm (Figure 4a). In fact, we can estimate the size of the crystalline grains by Scherrer formula as well. Based on the typical reflection of the (104) crystalline plane (Figure 1), the crystallite size was calculated to be about 27 nm. Obviously, the two results are almost the same. The HRTEM image shows resolved lattice fringes of (104) and (110) planes with a spacing of almost 0.27 and 0.25 nm (Figure 4b), consistent with the XRD results. The inset in Figure 4a shows the SAED pattern taken from the marked part, which can be indexed to a rhombohedral hexagonal phase (space group ) with lattice constants a = 0.5035 nm and c = 1.3747 nm.

Bottom Line: We have successfully prepared α-Fe2O3 nanospheres by solvothermal method using 2-butanone and water mixture solvent for the first time, which were about 100 nm in diameter and composed of very small nanoparticles.The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy.The results showed that the product was α-Fe2O3 nanosphere, and the temperature was an important factor on the formation of α-Fe2O3 nanospheres.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemistry, University of Science and Technology of China, Hefei, 230026, People's Republic of China. kbtang@ustc.edu.cn.

ABSTRACT
We have successfully prepared α-Fe2O3 nanospheres by solvothermal method using 2-butanone and water mixture solvent for the first time, which were about 100 nm in diameter and composed of very small nanoparticles. The as-prepared samples were characterized using X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The results showed that the product was α-Fe2O3 nanosphere, and the temperature was an important factor on the formation of α-Fe2O3 nanospheres.

No MeSH data available.