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首页> 外文期刊>RSC Advances >One-pot synthesis and assembly of melamine-based nanoparticles for microporous polymer organic frameworks and their application as a support for a silver nanoparticle catalyst
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One-pot synthesis and assembly of melamine-based nanoparticles for microporous polymer organic frameworks and their application as a support for a silver nanoparticle catalyst

机译：用于微孔聚合物有机骨架的三聚氰胺基纳米颗粒的一锅法合成和组装及其作为银纳米颗粒催化剂的载体的应用

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摘要

A facile solvothermal method was developed for the one-pot synthesis of melamine-based nanoparticles and their subsequent assembly into microporous polymer organic frameworks (POFs), without the aid of catalysts or templates, using melamine and aromatic dialdehydes as the monomers. The structures and properties of the resulting materials were then systematically characterized by means of Fourier-transformed infrared (FTIR) spectroscopy, solid-state NMR, scanning electron microscopy (SEM) and N-2 adsorption isotherms. The results confirmed that the nanoparticles were constructed first and then assembled to form a porous structure with a broad distribution of pore size and high surface areas, which is ideal for a balance between the mass-transportation and active sites. Given the solvothermal conditions of 180 degrees C for 10 h, the as-prepared POFs possess intrinsic microporosity arising from highly cross-linked aminal networks, with specific surface areas of up to 718 m(2) g(-1) and pore volumes of up to 1.10 cm(3) g(-1) at the molar ratio of 2 : 3 for melamine to terephthalaldehyde. The POF supported silver nanoparticles show an excellent catalytic performance for the degradation of methylene blue.
机译：开发了一种简便的溶剂热方法，用于以三聚氰胺和芳族二醛为单体，无需催化剂或模板就可以一锅合成三聚氰胺基纳米颗粒，然后将其组装成微孔聚合物有机骨架（POF）。然后通过傅立叶变换红外（FTIR）光谱，固态NMR，扫描电子显微镜（SEM）和N-2吸附等温线对所得材料的结构和性质进行系统表征。结果证实，首先构造纳米粒子，然后组装以形成具有宽的孔径分布和高表面积的多孔结构，这对于在质量传递和活性位点之间取得平衡是理想的。给定180摄氏度的溶剂热条件10 h，制备的POF具有固有的微孔性，该微孔性是由高度交联的缩醛胺网络产生的，比表面积高达718 m（2）g（-1），孔体积为三聚氰胺与对苯二甲醛的摩尔比为2：3时最高可达1.10 cm（3）g（-1）。 POF负载的银纳米颗粒对亚甲基蓝的降解显示出优异的催化性能。

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