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Synthesis and optical property of one-dimensional spinel ZnMn2O4 nanorods.

Zhang P, Li X, Zhao Q, Liu S - Nanoscale Res Lett (2011)

Bottom Line: The ZnMn2O4 nanorods in well-formed crystallinity and phase purity appeared with the width in 50-100 nm and the length in 1.5-2 μm.They exhibited strong absorption below 500 nm with the threshold edges around 700 nm.A significant photovoltage response in the region below 400 nm could be observed for the nanorods calcined at 650 and 800°C.

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Affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China. xyli@dlut.edu.cn.

ABSTRACT
Spinel zinc manganese oxide (ZnMn2O4) nanorods were successfully prepared using the previously synthesized α-MnO2 nanorods by a hydrothermal method as template. The nanorods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-Vis absorption, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and Fourier transform infrared spectroscopy. The ZnMn2O4 nanorods in well-formed crystallinity and phase purity appeared with the width in 50-100 nm and the length in 1.5-2 μm. They exhibited strong absorption below 500 nm with the threshold edges around 700 nm. A significant photovoltage response in the region below 400 nm could be observed for the nanorods calcined at 650 and 800°C.

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Characterization of the ZnMn2O4 nanorods calcined at 650°C: (a,b) TEM images; (c) HRTEM image. Inset: the enlargement of the marked square; and (d) SAED pattern.
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Figure 3: Characterization of the ZnMn2O4 nanorods calcined at 650°C: (a,b) TEM images; (c) HRTEM image. Inset: the enlargement of the marked square; and (d) SAED pattern.

Mentions: The TEM and HRTEM were employed to further investigate the morphology of these nanocrystalline ZnMn2O4 superstructures calcined at 650°C (Figure 3). TEM image confirms the nanocrystalline feature of the ZnMn2O4 particles (Figure 3a,b), in which the individual rod width is in the range of 50-100 nm. Figure 3c shows the HRTEM image of ZnMn2O4 nanorods. The inset in Figure 3c is the enlargement of the selected area, indicating the good crystallization of the nanoparticles. The fringes of d = 0.246 nm match that of the (211) crystallographic plane of ZnMn2O4, which is the strongest crystallographic plane, corresponding to the distance between (211) crystal planes of the spinel phase of zinc manganese oxide (JCPDS file No. 24-1133). Figure 3d is the SAED image of the ZnMn2O4 nanorods, which shows the (211), (224), and (321) crystal planes clearly.


Synthesis and optical property of one-dimensional spinel ZnMn2O4 nanorods.

Zhang P, Li X, Zhao Q, Liu S - Nanoscale Res Lett (2011)

Characterization of the ZnMn2O4 nanorods calcined at 650°C: (a,b) TEM images; (c) HRTEM image. Inset: the enlargement of the marked square; and (d) SAED pattern.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211411&req=5

Figure 3: Characterization of the ZnMn2O4 nanorods calcined at 650°C: (a,b) TEM images; (c) HRTEM image. Inset: the enlargement of the marked square; and (d) SAED pattern.
Mentions: The TEM and HRTEM were employed to further investigate the morphology of these nanocrystalline ZnMn2O4 superstructures calcined at 650°C (Figure 3). TEM image confirms the nanocrystalline feature of the ZnMn2O4 particles (Figure 3a,b), in which the individual rod width is in the range of 50-100 nm. Figure 3c shows the HRTEM image of ZnMn2O4 nanorods. The inset in Figure 3c is the enlargement of the selected area, indicating the good crystallization of the nanoparticles. The fringes of d = 0.246 nm match that of the (211) crystallographic plane of ZnMn2O4, which is the strongest crystallographic plane, corresponding to the distance between (211) crystal planes of the spinel phase of zinc manganese oxide (JCPDS file No. 24-1133). Figure 3d is the SAED image of the ZnMn2O4 nanorods, which shows the (211), (224), and (321) crystal planes clearly.

Bottom Line: The ZnMn2O4 nanorods in well-formed crystallinity and phase purity appeared with the width in 50-100 nm and the length in 1.5-2 μm.They exhibited strong absorption below 500 nm with the threshold edges around 700 nm.A significant photovoltage response in the region below 400 nm could be observed for the nanorods calcined at 650 and 800°C.

View Article: PubMed Central - HTML - PubMed

Affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering and State Key Laboratory of Fine Chemical, School of Environmental Science & Technology, Dalian University of Technology, Dalian, 116024, China. xyli@dlut.edu.cn.

ABSTRACT
Spinel zinc manganese oxide (ZnMn2O4) nanorods were successfully prepared using the previously synthesized α-MnO2 nanorods by a hydrothermal method as template. The nanorods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-Vis absorption, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and Fourier transform infrared spectroscopy. The ZnMn2O4 nanorods in well-formed crystallinity and phase purity appeared with the width in 50-100 nm and the length in 1.5-2 μm. They exhibited strong absorption below 500 nm with the threshold edges around 700 nm. A significant photovoltage response in the region below 400 nm could be observed for the nanorods calcined at 650 and 800°C.

No MeSH data available.


Related in: MedlinePlus