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Size Control and Growth Process Study of Au@Cu 2 O Particles

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ABSTRACT

Au@Cu2O cuboctahedron with gold triangular nanoplate core and Cu2O shell was synthesized by a chemical method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) tests demonstrated that the as-synthesis samples were consisted of gold triangular nanoplate core and Cu2O shell, and both of them were in good crystallization. The effective size control of the particles could be realized by controlling the amount of Au cores added in the synthetic process and Au@Cu2O particles with different shell thickness could be synthesized. The decrease of Cu2O shell thickness had a great difference in the optical performance, including blue shift of the resonant peaks and enhanced absorption intensity. The growth process from rough sheet structure to cuboctahedron was also explored. The results of photocatalytic degradation experiment showed that Au@Cu2O particles showed much better photocatalytic performance than that of pure Cu2O. The improved photocatalytic property of the Au@Cu2O particles was attributed to the comprehensive effect of the enhanced visible-light absorption and high separation rate of electron-hole pairs.

Electronic supplementary material: The online version of this article (doi:10.1186/s11671-016-1603-6) contains supplementary material, which is available to authorized users.

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N2 adsorption-desorption isotherms of the samples
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Fig5: N2 adsorption-desorption isotherms of the samples

Mentions: Nitrogen adsorption-desorption isotherms from the Brunauer-Emmett-Teller (BET) test showed (Fig. 5) that the specific surface areas of pure Cu2O, 72.5-nm Au@Cu2O and 53-nm Au@Cu2O were 7.00, 13.10, and 17.72 m2/g, respectively. This result demonstrated that the Au@Cu2O particles had similar specific surface areas.Fig. 5


Size Control and Growth Process Study of Au@Cu 2 O Particles
N2 adsorption-desorption isotherms of the samples
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5016315&req=5

Fig5: N2 adsorption-desorption isotherms of the samples
Mentions: Nitrogen adsorption-desorption isotherms from the Brunauer-Emmett-Teller (BET) test showed (Fig. 5) that the specific surface areas of pure Cu2O, 72.5-nm Au@Cu2O and 53-nm Au@Cu2O were 7.00, 13.10, and 17.72 m2/g, respectively. This result demonstrated that the Au@Cu2O particles had similar specific surface areas.Fig. 5

View Article: PubMed Central - PubMed

ABSTRACT

Au@Cu2O cuboctahedron with gold triangular nanoplate core and Cu2O shell was synthesized by a chemical method. X-ray diffraction (XRD) and transmission electron microscopy (TEM) tests demonstrated that the as-synthesis samples were consisted of gold triangular nanoplate core and Cu2O shell, and both of them were in good crystallization. The effective size control of the particles could be realized by controlling the amount of Au cores added in the synthetic process and Au@Cu2O particles with different shell thickness could be synthesized. The decrease of Cu2O shell thickness had a great difference in the optical performance, including blue shift of the resonant peaks and enhanced absorption intensity. The growth process from rough sheet structure to cuboctahedron was also explored. The results of photocatalytic degradation experiment showed that Au@Cu2O particles showed much better photocatalytic performance than that of pure Cu2O. The improved photocatalytic property of the Au@Cu2O particles was attributed to the comprehensive effect of the enhanced visible-light absorption and high separation rate of electron-hole pairs.

Electronic supplementary material: The online version of this article (doi:10.1186/s11671-016-1603-6) contains supplementary material, which is available to authorized users.

No MeSH data available.