Monodispersed Ag Nanoparticles as Catalyst: Preparation Based on Crystalline Supramolecular Hybrid of Decamethylcucurbit[5]uril and Silver Ions

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• 作者：Hong-Fang Li ; Jian L眉 ; Jing-Xiang Lin ; Rong Cao
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：June 2, 2014
• 年：2014
• 卷：53
• 期：11
• 页码：5692-5697
• 全文大小：401K
• 年卷期：v.53,no.11(June 2, 2014)
• ISSN：1520-510X

文摘

Monodispersed silver nanoparticles (Ag⁰ NPs) have been first prepared on the basis of a postsynthesis via mild reduction from a new crystalline supramolecular hybrid solid assembled from Ag⁺ ions and decamethylcucurbit[5]uril (Me₁₀CB[5]). Uniform growth of nearly spherical Ag⁰ NPs with an average size of ca. 4.4 nm was observed on the organic Me₁₀CB[5] support to form Ag@Me₁₀CB[5] composite material. The as-synthesized composite material was characterized by a range of physical measurements (PXRD, TGA, XPS, ICP, TEM, etc.) and was further exploited as a heterogeneous catalyst for the reduction of various nitrophenols in the presence of NaBH₄. The kinetics of the reduction process was monitored under various experimental conditions. The Ag@Me₁₀CB[5] composite material showed excellent catalytic performance over the reduction reactions and remained active after several consecutive cycles.