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首页> 外文期刊>Nanoscale Research Letters >Preparation of Hierarchical Porous Silicalite-1 Encapsulated Ag NPs and Its Catalytic Performance for 4-Nitrophenol Reduction
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Preparation of Hierarchical Porous Silicalite-1 Encapsulated Ag NPs and Its Catalytic Performance for 4-Nitrophenol Reduction

机译：多孔多孔Silicalite-1包裹的Ag纳米颗粒的制备及其催化4-硝基苯酚还原的性能

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摘要

A facile and efficient strategy is presented for the encapsulation of Ag NPs within hierarchical porous silicalite-1. The physicochemical properties of the resultant catalyst are characterized by TEM, XRD, FTIR, and N~(2)adsorption-desorption analytical techniques. It turns out that the Ag NPs are well distributed in MFI zeolite framework, which possesses hierarchical porous characteristics (1.75, 3.96?nm), and the specific surface area is as high as 243?m_(2)?·?g_(?1). More importantly, such catalyst can rapidly transform the 4-nitrophenol to 4-aminophenol in aqueous solution at room temperature, and a quantitative conversion is also obtained after being reused 10 times. The reasons can be attributed to the fast mass transfer, large surface area, and spatial confinement effect of the advanced support.
机译：提出了一种简便有效的策略，用于将Ag NP封装在分级多孔Silicalite-1中。用TEM，XRD，FTIR和N〜（2）吸附-脱附分析技术对所得催化剂的理化性质进行了表征。结果表明，Ag NPs在MFI沸石骨架中分布良好，具有分层的多孔特性（1.75，3.96？nm），比表面积高达243？m_（2）？·？g _（？1 ）。更重要的是，这种催化剂可以在室温下将4-硝基苯酚在水溶液中快速转化为4-氨基苯酚，并且在重复使用10次后也获得了定量转化。原因可归因于先进支撑的快速传质，大表面积和空间限制作用。

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