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

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.


a Degradation curves of MO under visible-light irradiation. b Recyclability of the 72.5-nm Au@Cu2O for MO degradation
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC5016315&req=5

Fig6: a Degradation curves of MO under visible-light irradiation. b Recyclability of the 72.5-nm Au@Cu2O for MO degradation

Mentions: Figure 6a showed the degradation plots of MO involving photocatalytic activities of the samples. Compared with the pure Cu2O, Au@Cu2O particles showed better photocatalytic performance. As the shell thickness of the Au@Cu2O particles decreases, photocatalytic property was getting better. However, when the shell thickness was deceased from 72.5 to 53 nm, the photocatalytic property turned out to be worse. Thus, the 72.5-nm Au@Cu2O was found to exhibit the best catalytic performance, and after 80 min of the photoreaction, more than 86 % of MO was degraded.Fig. 6


Size Control and Growth Process Study of Au@Cu 2 O Particles
a Degradation curves of MO under visible-light irradiation. b Recyclability of the 72.5-nm Au@Cu2O for MO degradation
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig6: a Degradation curves of MO under visible-light irradiation. b Recyclability of the 72.5-nm Au@Cu2O for MO degradation
Mentions: Figure 6a showed the degradation plots of MO involving photocatalytic activities of the samples. Compared with the pure Cu2O, Au@Cu2O particles showed better photocatalytic performance. As the shell thickness of the Au@Cu2O particles decreases, photocatalytic property was getting better. However, when the shell thickness was deceased from 72.5 to 53 nm, the photocatalytic property turned out to be worse. Thus, the 72.5-nm Au@Cu2O was found to exhibit the best catalytic performance, and after 80 min of the photoreaction, more than 86 % of MO was degraded.Fig. 6

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.