Limits...
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.


AC SPV amplitude spectra of the ZnMn2O4 nanorods calcined at 500, 650, and 800°C. Inset: schematic of the AC photovoltaic cells.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: AC SPV amplitude spectra of the ZnMn2O4 nanorods calcined at 500, 650, and 800°C. Inset: schematic of the AC photovoltaic cells.

Mentions: SPV method, a well-established technique for the characterization of photoelectric materials, can be used to investigate their photoelectric properties [24]. Figure 6 presents the obtained SPV amplitude spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C and the schematic of the AC photovoltaic cells. As the calcined temperature goes on increasing, the SPV response intensities become stronger and stronger because the spinel ZnMn2O4 nanorods become well ordered and the crystallinities enhance. For the ZnMn2O4 nanorods calcined at 650 and 800°C, a significant SPV response band could be observed in the region 300-400 nm, which is directly related to the free charge carriers induced by the incident light. However, only a very small response can be observed about the product calcined at 500°C because of poor crystallinity of ZnMn2O4 as well as the existence of α-MnO2, which almost cannot produce SPV response.


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

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

AC SPV amplitude spectra of the ZnMn2O4 nanorods calcined at 500, 650, and 800°C. Inset: schematic of the AC photovoltaic cells.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 6: AC SPV amplitude spectra of the ZnMn2O4 nanorods calcined at 500, 650, and 800°C. Inset: schematic of the AC photovoltaic cells.
Mentions: SPV method, a well-established technique for the characterization of photoelectric materials, can be used to investigate their photoelectric properties [24]. Figure 6 presents the obtained SPV amplitude spectra for the ZnMn2O4 nanorods calcined at 500, 650, and 800°C and the schematic of the AC photovoltaic cells. As the calcined temperature goes on increasing, the SPV response intensities become stronger and stronger because the spinel ZnMn2O4 nanorods become well ordered and the crystallinities enhance. For the ZnMn2O4 nanorods calcined at 650 and 800°C, a significant SPV response band could be observed in the region 300-400 nm, which is directly related to the free charge carriers induced by the incident light. However, only a very small response can be observed about the product calcined at 500°C because of poor crystallinity of ZnMn2O4 as well as the existence of α-MnO2, which almost cannot produce SPV response.

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.