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ZnO@CdS Core-Shell Heterostructures: Fabrication, Enhanced Photocatalytic, and Photoelectrochemical Performance.

Ding M, Yao N, Wang C, Huang J, Shao M, Zhang S, Li P, Deng X, Xu X - Nanoscale Res Lett (2016)

Bottom Line: ZnO nanorods and ZnO@CdS heterostructures have been fabricated on carbon fiber cloth substrates via hydrothermal and electrochemical deposition.The result illustrated that the photodegradation efficiency of ZnO@CdS heterostructures was better than that of pure ZnO nanorods, in which the rate constants were about 0.04629 and 0.02617 min(-1).Furthermore, the photocurrent of ZnO@CdS heterostructures achieved 10(2) times enhancement than pure ZnO nanorods, indicating that more free carriers could be generated and transferred in ZnO@CdS heterostructures, which could be responsible for the increased photocatalytic performance.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Technology, University of Jinan, 336 Nanxinzhuang West Road, Jinan, 250022, Shandong Province, People's Republic of China.

ABSTRACT
ZnO nanorods and ZnO@CdS heterostructures have been fabricated on carbon fiber cloth substrates via hydrothermal and electrochemical deposition. Their photocatalytic properties were investigated by measuring the degradation of methylene blue under ultraviolet light irradiation. The result illustrated that the photodegradation efficiency of ZnO@CdS heterostructures was better than that of pure ZnO nanorods, in which the rate constants were about 0.04629 and 0.02617 min(-1). Furthermore, the photocurrent of ZnO@CdS heterostructures achieved 10(2) times enhancement than pure ZnO nanorods, indicating that more free carriers could be generated and transferred in ZnO@CdS heterostructures, which could be responsible for the increased photocatalytic performance.

No MeSH data available.


XRD patterns of ZnO and ZnO@CdS heterostructure. Peaks corresponding to ZnO and CdS are labeled
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Fig2: XRD patterns of ZnO and ZnO@CdS heterostructure. Peaks corresponding to ZnO and CdS are labeled

Mentions: The typical XRD spectrum of the as-grown ZnO nanorods and ZnO@CdS nanocomposites grown on carbon fiber cloth are depicted in Fig. 2. Figure 2a shows the XRD pattern of as-grown ZnO nanorods, in which the broad peaks located at 25.7° and 43.7° are ascribed to the diffraction peak of the carbon cloth. All the diffraction peaks at 31.8°, 34.4°, 36.3°, 47.7°, 56.7°, 63.0°, 66.4°, 68.1°, and 69.3° can well be attributed to the crystal planes (100), (002), (101), (102), (110), (103), (200), (112), and (201) of ZnO, which indicates that the products can be indexed to hexagonal wurtzite structure of ZnO without any impurities (JCPDS:79-0205). ZnO@CdS heterostructures exhibited new diffraction peaks centered at 24.9°, 26.6°, 28.3°, 43.9°, 52.1°, 58.6°, 67.1°, 69.6°, 71.2°, and 72.7°, corresponding to the crystal planes (100), (002), (101), (110), (112), (202), (203), (210), (211), and (114) of the hexagonal phase of CdS (JCPDS:80-0006) (shown in Fig. 2b). The result illustrated that ZnO@CdS nanocomposites were composed of a hexagonal structure ZnO and CdS. Moreover, no crystal phase transformation of ZnO was observed after CdS coating, confirming that the obtained product was of high purity.Fig. 2


ZnO@CdS Core-Shell Heterostructures: Fabrication, Enhanced Photocatalytic, and Photoelectrochemical Performance.

Ding M, Yao N, Wang C, Huang J, Shao M, Zhang S, Li P, Deng X, Xu X - Nanoscale Res Lett (2016)

XRD patterns of ZnO and ZnO@CdS heterostructure. Peaks corresponding to ZnO and CdS are labeled
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835407&req=5

Fig2: XRD patterns of ZnO and ZnO@CdS heterostructure. Peaks corresponding to ZnO and CdS are labeled
Mentions: The typical XRD spectrum of the as-grown ZnO nanorods and ZnO@CdS nanocomposites grown on carbon fiber cloth are depicted in Fig. 2. Figure 2a shows the XRD pattern of as-grown ZnO nanorods, in which the broad peaks located at 25.7° and 43.7° are ascribed to the diffraction peak of the carbon cloth. All the diffraction peaks at 31.8°, 34.4°, 36.3°, 47.7°, 56.7°, 63.0°, 66.4°, 68.1°, and 69.3° can well be attributed to the crystal planes (100), (002), (101), (102), (110), (103), (200), (112), and (201) of ZnO, which indicates that the products can be indexed to hexagonal wurtzite structure of ZnO without any impurities (JCPDS:79-0205). ZnO@CdS heterostructures exhibited new diffraction peaks centered at 24.9°, 26.6°, 28.3°, 43.9°, 52.1°, 58.6°, 67.1°, 69.6°, 71.2°, and 72.7°, corresponding to the crystal planes (100), (002), (101), (110), (112), (202), (203), (210), (211), and (114) of the hexagonal phase of CdS (JCPDS:80-0006) (shown in Fig. 2b). The result illustrated that ZnO@CdS nanocomposites were composed of a hexagonal structure ZnO and CdS. Moreover, no crystal phase transformation of ZnO was observed after CdS coating, confirming that the obtained product was of high purity.Fig. 2

Bottom Line: ZnO nanorods and ZnO@CdS heterostructures have been fabricated on carbon fiber cloth substrates via hydrothermal and electrochemical deposition.The result illustrated that the photodegradation efficiency of ZnO@CdS heterostructures was better than that of pure ZnO nanorods, in which the rate constants were about 0.04629 and 0.02617 min(-1).Furthermore, the photocurrent of ZnO@CdS heterostructures achieved 10(2) times enhancement than pure ZnO nanorods, indicating that more free carriers could be generated and transferred in ZnO@CdS heterostructures, which could be responsible for the increased photocatalytic performance.

View Article: PubMed Central - PubMed

Affiliation: School of Physics and Technology, University of Jinan, 336 Nanxinzhuang West Road, Jinan, 250022, Shandong Province, People's Republic of China.

ABSTRACT
ZnO nanorods and ZnO@CdS heterostructures have been fabricated on carbon fiber cloth substrates via hydrothermal and electrochemical deposition. Their photocatalytic properties were investigated by measuring the degradation of methylene blue under ultraviolet light irradiation. The result illustrated that the photodegradation efficiency of ZnO@CdS heterostructures was better than that of pure ZnO nanorods, in which the rate constants were about 0.04629 and 0.02617 min(-1). Furthermore, the photocurrent of ZnO@CdS heterostructures achieved 10(2) times enhancement than pure ZnO nanorods, indicating that more free carriers could be generated and transferred in ZnO@CdS heterostructures, which could be responsible for the increased photocatalytic performance.

No MeSH data available.