Synthesis of cyclodextrin-silicate sol-gel composite embedded gold nanoparticles and its electrocatalytic application

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• 作者：Shanmugam Manivannan ; Ramasamy Ramaraj ; ^{ramarajr@yahoo.com}
• 关键词：Gold nanoparticles ; Silicate sol&ndash ; gel ; ¦Â-Cyclodextrin ; Nitroaromatics ; Electrocatalysis ; Electrochemical sensor
• 刊名：Chemical Engineering Journal
• 出版年：2012
• 出版时间：1 November, 2012
• 年：2012
• 卷：210
• 期：Complete
• 页码：195-202
• 全文大小：1030 K

文摘

Single step synthesis of gold nanoparticles (Au NPs) in aqueous solution using amine functionalized silane and ¦Â-cyclodextrin (CD) composite is reported. High resolution transmission electron microscopy was used to characterize the 3 and 5 nm Au NPs embedded in ¦Â-CD-silicate sol-gel matrix (TPDT) composite. The electrocatalysis and the sensing of nitroaromatics were studied at the Au NPs embedded in the ¦Â-CD-TPDT composite modified electrode using the cyclic voltammetric and the square-wave voltammetric techniques. The square-wave voltammetric technique provides a facile, simple and fast quantitative method for the detection and determination of nitroaromatics at the Au NPs modified electrode. It is inferred that the ¦Â-CD plays a predominant role both in the green synthesis of Au NPs embedded in ¦Â-CD-TPDT composite and its applications in the electrocatalysis and sensing of nitroaromatics.