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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.

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.


FTIR spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C, respectively.
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Figure 7: FTIR spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C, respectively.

Mentions: Infrared (IR) spectroscopy could provide plentiful information on the molecular structure and chemical bonding, which enables the characterization and identification of chemical species. Herein, we employed IR spectroscopy to comparatively analyze and identify the material compositions of different products. The IR spectra of the prepared samples treated at 500, 650, and 800°C are presented in Figure 7. The spectrum of the precursor calcined at 500°C shows a band at 531 cm-1, which is attributed to the Mn-O vibrations of MnO2. The bands belonging to ZnMn2O4 nanorods are considerably weak, probably because of the co-existence of α-MnO2 and ZnO. When the temperature reached 650°C, a strong band at 516 cm-1 and a weak one at 623 cm-1 related to spinel ZnMn2O4 appear. Upon increasing the treatment temperature to 800°C, these bands become more intense and shift to higher wavenumbers, from 516 to 547 cm-1 and from 623 to 642 cm-1, which reveals the formed spinel nanorods have achieved an improved crystallinity [25].


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

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

FTIR spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 7: FTIR spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C, respectively.
Mentions: Infrared (IR) spectroscopy could provide plentiful information on the molecular structure and chemical bonding, which enables the characterization and identification of chemical species. Herein, we employed IR spectroscopy to comparatively analyze and identify the material compositions of different products. The IR spectra of the prepared samples treated at 500, 650, and 800°C are presented in Figure 7. The spectrum of the precursor calcined at 500°C shows a band at 531 cm-1, which is attributed to the Mn-O vibrations of MnO2. The bands belonging to ZnMn2O4 nanorods are considerably weak, probably because of the co-existence of α-MnO2 and ZnO. When the temperature reached 650°C, a strong band at 516 cm-1 and a weak one at 623 cm-1 related to spinel ZnMn2O4 appear. Upon increasing the treatment temperature to 800°C, these bands become more intense and shift to higher wavenumbers, from 516 to 547 cm-1 and from 623 to 642 cm-1, which reveals the formed spinel nanorods have achieved an improved crystallinity [25].

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.