Size-adjusted hollow Ag spheres fabricated through reducing Ag₂O in situ

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• 作者：Ping Yang ; Yulan Zhang ; Baibiao Huang
• 关键词：A. Metals ; A. Nanostructures ; A. Oxides ; B. Chemical synthesis ; B. Crystal growth
• 刊名：Materials Research Bulletin
• 出版年：2013
• 出版时间：October, 2013
• 年：2013
• 卷：48
• 期：10
• 页码：3756-3760
• 全文大小：3534 K

文摘

Hollow Ag spheres with tunable sizes in a range of 74-167 nm were fabricated using a two-step synthesis including the creation of solid Ag₂O particles and the reduction of these Ag₂O particles in situ. Ag nanoclusters were generated by the reduction of Ag₂O. Ag₂O particles were as scaffolds to create Ag spheres. Namely, the reduction of Ag₂O occurred firstly on the surface of the Ag₂O particles. The H₂ was generated due to the hydrolysis of borohydride ions. The diffusion of H₂ and the further reduction of Ag₂O particles resulted in the formation of a hollow part within Ag spheres. The average diameter of the hollow Ag spheres can be adjusted by varying the concentration of NaOH and NaBH₄, the kinds of solvent, and reaction temperature.