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Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition.

Jiang X, Lin Q, Zhang M, He G, Sun Z - Nanoscale Res Lett (2015)

Bottom Line: The peaks corresponding to ZnO nanorods and Cu2O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results.UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV.The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Material Science, Anhui University, Hefei, 230601 China ; School of Electronic and Electrical Engineering, Chuzhou University, Chuzhou, 239000 China.

ABSTRACT
Cu2O-modified ZnO nanorods are prepared by a two-step electrodeposition method on ITO substrates, and the deposition time of Cu2O is 0, 1, 5, and 10 min, respectively. Cu2O particles are embedded in the interspaces of the ZnO nanorods, and the amounts of the Cu2O particles increase obviously when the deposition time lasts longer. The peaks corresponding to ZnO nanorods and Cu2O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results. UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV. The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

No MeSH data available.


The visible light photocatalytic degradation ratios to MO of the samples.
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Fig7: The visible light photocatalytic degradation ratios to MO of the samples.

Mentions: The photocatalytic activities of the as-prepared samples were carried out by the degradation of MO solution under visible light irradiation, and the experimental results are shown in Figure 7. Here, C0 and C are the absorbance of the characteristic absorption peak (464 nm) of MO solution before and after irradiation. As indicated in Figure 7, the pure ZnO nanorods exhibit a weak ability for the degradation of MO. The poor degradation ability of the pure ZnO nanorods can be ascribed to the fact that the visible light cannot provide energy to excite electrons from the valance band to the conduction band. All the Cu2O-modified ZnO nanorods have strong degradation ability of MO than the pure ZnO nanorods [44]. With increasing Cu2O electrodeposition time, the degradation abilities of the Cu2O-modified ZnO nanorods enhanced. The reason is that Cu2O has higher degradation ability than ZnO. Meanwhile, the amount of Cu2O particles on the ZnO nanorods increases when increasing the Cu2O electrodeposition time. Furthermore, the Cu2O-modified ZnO nanorods have a large specific surface area than pure ZnO nanorods. It is worth mentioning that the MO concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time of 10 min. As a result, the photocatalytic activity of the Cu2O-modified ZnO nanorods depends on the Cu2O electrodeposition time.Figure 7


Microstructure, optical properties, and catalytic performance of Cu2O-modified ZnO nanorods prepared by electrodeposition.

Jiang X, Lin Q, Zhang M, He G, Sun Z - Nanoscale Res Lett (2015)

The visible light photocatalytic degradation ratios to MO of the samples.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384900&req=5

Fig7: The visible light photocatalytic degradation ratios to MO of the samples.
Mentions: The photocatalytic activities of the as-prepared samples were carried out by the degradation of MO solution under visible light irradiation, and the experimental results are shown in Figure 7. Here, C0 and C are the absorbance of the characteristic absorption peak (464 nm) of MO solution before and after irradiation. As indicated in Figure 7, the pure ZnO nanorods exhibit a weak ability for the degradation of MO. The poor degradation ability of the pure ZnO nanorods can be ascribed to the fact that the visible light cannot provide energy to excite electrons from the valance band to the conduction band. All the Cu2O-modified ZnO nanorods have strong degradation ability of MO than the pure ZnO nanorods [44]. With increasing Cu2O electrodeposition time, the degradation abilities of the Cu2O-modified ZnO nanorods enhanced. The reason is that Cu2O has higher degradation ability than ZnO. Meanwhile, the amount of Cu2O particles on the ZnO nanorods increases when increasing the Cu2O electrodeposition time. Furthermore, the Cu2O-modified ZnO nanorods have a large specific surface area than pure ZnO nanorods. It is worth mentioning that the MO concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time of 10 min. As a result, the photocatalytic activity of the Cu2O-modified ZnO nanorods depends on the Cu2O electrodeposition time.Figure 7

Bottom Line: The peaks corresponding to ZnO nanorods and Cu2O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results.UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV.The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Material Science, Anhui University, Hefei, 230601 China ; School of Electronic and Electrical Engineering, Chuzhou University, Chuzhou, 239000 China.

ABSTRACT
Cu2O-modified ZnO nanorods are prepared by a two-step electrodeposition method on ITO substrates, and the deposition time of Cu2O is 0, 1, 5, and 10 min, respectively. Cu2O particles are embedded in the interspaces of the ZnO nanorods, and the amounts of the Cu2O particles increase obviously when the deposition time lasts longer. The peaks corresponding to ZnO nanorods and Cu2O particles are detected from scanning electron microscope (SEM) and X-ray diffraction (XRD) results. UV-vis absorption spectra measurements have shown the bandgaps of ZnO nanorods shift from 3.22 to 2.75 eV. The methyl orange (MO) concentration can be reduced to around 15% in 100 min with Cu2O electrodeposition time for 10 min.

No MeSH data available.