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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.

No MeSH data available.


The SEM images of different samples: (a) α-MnO2 nanorods; (b) α-MnO2/Zn(OH)2 nanorods; (c) the ZnMn2O4 nanorods calcined at 650°C; and (d) EDS spectrum of the ZnMn2O4 nanorods calcined at 650°C.
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Figure 2: The SEM images of different samples: (a) α-MnO2 nanorods; (b) α-MnO2/Zn(OH)2 nanorods; (c) the ZnMn2O4 nanorods calcined at 650°C; and (d) EDS spectrum of the ZnMn2O4 nanorods calcined at 650°C.

Mentions: The general morphology of these nanorods was observed using scanning electron microscopy (SEM). Figure 2a displays an overview image of the α-MnO2 nanorods. After coating Zn(OH)2 onto the α-MnO2 nanorods, the precursor of ZnMn2O4 nanorods is obtained. The SEM images in Figure 2b show that the morphology does not change with the rod width in the range of 50-100 nm and the length in the range of 1.5-2 μm. The morphology of the ZnMn2O4 obtained by calcination at 650°C of the precursor is shown in Figure 2c. It also displays a similar morphology to the MnO2 nanorods. The EDS characterization at the same position was carried out. As shown in Figure 2d, it is clear that the nanorods consist of Zn, Mn, and O and the elemental ratio of Zn to Mn is determined to be about 1:2.


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

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

The SEM images of different samples: (a) α-MnO2 nanorods; (b) α-MnO2/Zn(OH)2 nanorods; (c) the ZnMn2O4 nanorods calcined at 650°C; and (d) EDS spectrum of the ZnMn2O4 nanorods calcined at 650°C.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
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getmorefigures.php?uid=PMC3211411&req=5

Figure 2: The SEM images of different samples: (a) α-MnO2 nanorods; (b) α-MnO2/Zn(OH)2 nanorods; (c) the ZnMn2O4 nanorods calcined at 650°C; and (d) EDS spectrum of the ZnMn2O4 nanorods calcined at 650°C.
Mentions: The general morphology of these nanorods was observed using scanning electron microscopy (SEM). Figure 2a displays an overview image of the α-MnO2 nanorods. After coating Zn(OH)2 onto the α-MnO2 nanorods, the precursor of ZnMn2O4 nanorods is obtained. The SEM images in Figure 2b show that the morphology does not change with the rod width in the range of 50-100 nm and the length in the range of 1.5-2 μm. The morphology of the ZnMn2O4 obtained by calcination at 650°C of the precursor is shown in Figure 2c. It also displays a similar morphology to the MnO2 nanorods. The EDS characterization at the same position was carried out. As shown in Figure 2d, it is clear that the nanorods consist of Zn, Mn, and O and the elemental ratio of Zn to Mn is determined to be about 1:2.

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.