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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.


XRD patterns of the Cu2O-modified ZnO nanorods.
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Fig2: XRD patterns of the Cu2O-modified ZnO nanorods.

Mentions: Figure 2 illustrates the XRD pattern of the Cu2O-modified ZnO nanorods with different deposition times of Cu2O particles. From Figure 2, the characteristic peaks of Cu and CuO are not observed for all the samples, suggesting that no metallic copper or CuO formed in the electrodeposition process. The single-phase polycrystalline Cu2O films have been obtained only with the applied potential below −0.3 V [36]. In Figure 2a, apart from the diffraction peaks corresponding to the ITO substrate, the peaks that corresponded to the reflections are 100, 002, 101, 102, 110, and 103 peaks of ZnO nanorods according to JCPDS: 89-1397. In Figure 2b,c,d, besides the peaks of ZnO nanorods and ITO substrate, the diffraction peaks of 111, 200, and 220 crystal planes of Cu2O appear (JCPDS: 05-0667). The Cu2O (111) peak (2θ = 36.50°) is very close to the ZnO (101) peak (2θ = 36.25°), and they are overlapped in the pattern. The intensities of the Cu2O characteristic peaks increase with the Cu2O electrodeposition time for increased amounts of the Cu2O nanoparticles. The characteristic peaks of Cu2O electrodeposited for 1 min (Figure 2b) can barely be detected, and this can be ascribed to an insufficient amount. In a word, the peaks of Cu2O particles are relatively weaker due to the shorter deposition time compared with ZnO nanorods.Figure 2


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)

XRD patterns of the Cu2O-modified ZnO nanorods.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Fig2: XRD patterns of the Cu2O-modified ZnO nanorods.
Mentions: Figure 2 illustrates the XRD pattern of the Cu2O-modified ZnO nanorods with different deposition times of Cu2O particles. From Figure 2, the characteristic peaks of Cu and CuO are not observed for all the samples, suggesting that no metallic copper or CuO formed in the electrodeposition process. The single-phase polycrystalline Cu2O films have been obtained only with the applied potential below −0.3 V [36]. In Figure 2a, apart from the diffraction peaks corresponding to the ITO substrate, the peaks that corresponded to the reflections are 100, 002, 101, 102, 110, and 103 peaks of ZnO nanorods according to JCPDS: 89-1397. In Figure 2b,c,d, besides the peaks of ZnO nanorods and ITO substrate, the diffraction peaks of 111, 200, and 220 crystal planes of Cu2O appear (JCPDS: 05-0667). The Cu2O (111) peak (2θ = 36.50°) is very close to the ZnO (101) peak (2θ = 36.25°), and they are overlapped in the pattern. The intensities of the Cu2O characteristic peaks increase with the Cu2O electrodeposition time for increased amounts of the Cu2O nanoparticles. The characteristic peaks of Cu2O electrodeposited for 1 min (Figure 2b) can barely be detected, and this can be ascribed to an insufficient amount. In a word, the peaks of Cu2O particles are relatively weaker due to the shorter deposition time compared with ZnO nanorods.Figure 2

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.