An α-K₃PMo₃W₉O₄₀ film loaded with silver nanoparticles: Fabrication, characterization and properties

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• 作者：Ying Gu ; Huiyuan Ma ; Kevin P. O’ ; Halloran ; Shilin Shi ; Zhijing Zhang ; Xiaoguang Wang
• 关键词：Silver nanoparticles ; Polyoxometalates ; LBL ; Electrochemistry ; PMo₃W₉
• 刊名：Electrochimica Acta
• 出版年：2009
• 出版时间：1 December 2009
• 年：2009
• 卷：54
• 期：28
• 页码：7194-7200
• 全文大小：390 K

文摘

A composite film consisting of the mixed-addenda Keggin-type polyoxometalate α-K₃PMo₃W₉O₄₀ (PMo₃W₉) and silver nanoparticles (AgNPs) was fabricated on quartz, silicon, and ITO by the layer-by-layer self-assembly method. The regular growth of the multilayer film was monitored by UV–vis spectroscopy, and the morphology was measured by atomic force microscopy (AFM). The multilayer film embedded by AgNPs exhibited the photo-luminescence ascribed to electronic transitions from excited states to d levels of the silver nanoparticles. The composite film also showed electrocatalytic activity towards reduction of NO₂⁻, H₂O₂, ClO₃⁻, BrO₃⁻, and IO₃⁻ attributed to tungsten-centered and molybdenum-centered redox processes of PMo₃W₉.