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Gold Nanoparticles Confined in Vertically Aligned Silica Nanochannels and Their Electrocatalytic Activity Toward Ascorbic Acid

机译:金纳米粒子限制在垂直排列的二氧化硅纳米通道及其对抗坏血酸的电催化活性

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摘要

A facile method of confining gold nanoparticles (AuNPs) in silica nanochannels aligned perpendicularly to an underlying electrode surface is reported. The nanochannel surface carrying a layer of (3-aminopropyl)triethoxy silane (APTS) displays a strong electrostatic interaction with AuCl_4~-, eventually resulting in the confinement of AuNPs inside the nanochannels after chemical reduction. As-prepared AuNPs in APTS-modified mesoporous silica film (APTS-MSF) are highly dispersed with a narrow size distribution. Furthermore, these AuNPs are free of protecting ligands and exhibit a good electrochemical catalytic activity toward the oxidation of ascorbic acid.
机译:报道了一种将金纳米颗粒(AuNP)限制在垂直于下面的电极表面排列的二氧化硅纳米通道中的简便方法。带有(3-氨丙基)三乙氧基硅烷(APTS)层的纳米通道表面显示出与AuCl_4〜-的强静电相互作用,最终导致化学还原后纳米通道内部被限制在AuNPs中。 APTS改性的介孔二氧化硅薄膜(APTS-MSF)中制备的AuNPs高度分散且尺寸分布狭窄。此外,这些AuNP没有保护配体,并且对抗坏血酸的氧化表现出良好的电化学催化活性。

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