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Size-Selective Yolk-Shell Nanoreactors with Nanometer-Thin Porous Polymer Shells

机译:具有纳米厚度的多孔聚合物壳的尺寸选择性卵黄壳纳米反应器

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摘要

Yolk-shell nanoreactors with metal nanoparticle core and ultrathin porous polymer shells are effective catalysts for heterogeneous reactions. Polymer shells provide size-selectivity and improved reusability of catalyst. Nanocapsules with single-nanometer porous shells are prepared by vesicle-templated directed assembly. Metal nanoparticles are formed either by selective initiation in pre-fabricated nanocapsules or simultaneously with the creation of a crosslinked polymer shell. In this study, we investigated the oxidation of benzyl alcohol and benzaldehyde catalyzed by gold nanoparticles and hydrogenation of cyclohexene catalyzed by platinum nanoparticles. Comparison of newly created nanoreactors with commercially available nanoparticles revealed superior reusability and size selectivity in nanoreactors while showing no negative effect on reaction kinetics.
机译:具有金属纳米颗粒核和超薄多孔聚合物壳的卵黄壳纳米反应器是用于异相反应的有效催化剂。聚合物壳提供了尺寸选择性并提高了催化剂的可重复使用性。通过囊泡模板定向组装制备具有单纳米多孔壳的纳米胶囊。通过在预制的纳米胶囊中选择性引发或与交联聚合物壳的形成同时形成金属纳米颗粒。在这项研究中,我们研究了金纳米颗粒催化苯甲醇和苯甲醛的氧化以及铂纳米颗粒催化环己烯的氢化。新创建的纳米反应器与可商购的纳米颗粒的比较显示,纳米反应器具有出色的可重用性和尺寸选择性,同时对反应动力学没有负面影响。

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