Abstract In this paper, well-defined CHMSs were synthesized through co-hydrolysis of tetraethylsiloxane (TEOS) and 3-aminopropyltriethoxysilane (APTS) template by mesomorphous complexes of hexadecylpyridinium chloride (CPC) and poly(acrylic acid) (PAA). It was demonstrated that the adding amount of APTS in the reaction system played a key role in the formation of the hollow cage-like structure and a possible formation mechanism of CHMSs was proposed. The synthesized CHMSs presented as uniform microsphers with average diameter of 600 nm and possessed tri-model pore structure that were the ordered mesopores (˜3 nm) originated from CPC micelle, the secondary nanopores (˜55 nm) templated by phase separated PAA chain in the silica shell as well as the hollow cavity (several hundred nanometer). At the same time, the co-hydrolysis of APTS resulted in amino groups functionalized silica framework of the CHMSs. Ascribed to the unique structure and the inherent amino groups, the CHMSs were utilized as scaffold for preparation of heterogeneous noble metal nanoparticle catalysts. By choosing the palladium (Pd) as a typical example, 1-Pd@CHSMs catalysts containing 1.0 wt% Pd and uniform distributed small size Pd nanoparticles (˜2.9 nm) were obtained. The catalytic reduction of 4-nitrophenol demonstrated that the heterogeneous 1-Pd@CHSMs catalyst was efficient and reusable.

中文翻译：

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以介晶聚电解质-表面活性剂复合物为模板的笼状分级介孔空心二氧化硅微球用于贵金属纳米粒子的固定

摘要 在本文中，十六烷基氯化吡啶 (CPC) 和聚丙烯酸 (PAA) 的介晶配合物通过四乙基硅氧烷 (TEOS) 和 3-氨基丙基三乙氧基硅烷 (APTS) 模板共水解合成了明确定义的 CHMS。结果表明，反应体系中APTS的加入量对空心笼状结构的形成起着关键作用，并提出了CHMSs的可能形成机制。合成的 CHMS 呈现为平均直径为 600 nm 的均匀微球，并具有三模型孔结构，即源自 CPC 胶束的有序介孔（~3 nm），二级纳米孔（~55 nm）以相分离的 PAA 链为模板。二氧化硅壳以及空腔（数百纳米）。同时，APTS 的共水解导致 CHMS 的氨基官能化二氧化硅骨架。由于独特的结构和固有的氨基，CHMSs被用作制备多相贵金属纳米颗粒催化剂的支架。通过选择钯（Pd）作为典型示例，获得了含有 1.0 wt% Pd 和均匀分布的小尺寸 Pd 纳米粒子（~2.9 nm）的 1-Pd@CHSMs 催化剂。4-硝基苯酚的催化还原表明多相 1-Pd@CHSMs 催化剂高效且可重复使用。获得了含有 1.0 wt% Pd 和均匀分布的小尺寸 Pd 纳米粒子（~2.9 nm）的 1-Pd@CHSMs 催化剂。4-硝基苯酚的催化还原表明多相 1-Pd@CHSMs 催化剂高效且可重复使用。获得了含有 1.0 wt% Pd 和均匀分布的小尺寸 Pd 纳米粒子（~2.9 nm）的 1-Pd@CHSMs 催化剂。4-硝基苯酚的催化还原表明多相 1-Pd@CHSMs 催化剂高效且可重复使用。