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Facile Synthesis of Highly Efficient One-Dimensional Plasmonic Photocatalysts through Ag@Cu2O Core–Shell Heteronanowires

Xiong, Jinyan, Li, Zhen, Chen, Jun, Zhang, Shanqing, Wang, Lianzhou, Dou, Shixue
ACS Applied Materials & Interfaces 2014 v.6 no.18 pp. 15716-15725
X-ray diffraction, X-ray photoelectron spectroscopy, ambient temperature, crystal structure, cuprous oxide, irradiation, nanoparticles, nanospheres, nanowires, photocatalysis, photocatalysts, scanning electron microscopy, silver, solar radiation, surface plasmon resonance, transmission electron microscopy
A novel class of one-dimensional (1D) plasmonic Ag@Cu₂O core–shell heteronanowires have been synthesized at room temperature for photocatalysis application. The morphology, size, crystal structure and composition of the products were investigated by XRD, SEM, TEM, XPS, and UV–vis instruments. It was found the reaction time and the amount of Ag nanowires play crucial roles in the formation of well-defined 1D Ag@Cu₂O core–shell heteronanowires. The resultant 1D Ag@Cu₂O NWs exhibit much higher photocatalytic activity toward degradation of organic contaminants than Ag@Cu₂O core–shell nanoparticles or pure Cu₂O nanospheres under solar light irradiation. The drastic enhancement in photocatalytic activity could be attributed to the surface plasmon resonance and the electron sink effect of the Ag NW cores, and the unique 1D core–shell nanostructure.