Preparation of uniform magnetic recoverable catalyst microspheres with hierarchically mesoporous structure by using porous polymer microsphere template.
Preparation of uniform magnetic recoverable catalyst microspheres with hierarchically mesoporous structure by using porous polymer microsphere template.
复制标题
多孔聚合物微球模板制备具有分级介孔结构的均匀磁性可恢复催化剂微球
DOI：
10.1186/1556-276x-9-163
复制
发表时间：
2014-04-04
影响因子：
--
通讯作者：
Zhao J
中科院分区：
文献类型：
--
作者：
Ren L;Teng C;Zhu L;He J;Wang Y;Zuo X;Hong M;Wang Y;Jiang B;Zhao J
将具有不同功能的纳米粒子合并到一个微球中可以对各种应用产生深远的影响。然而，事实证明，在集成后保持每个组件的独特属性是一项重大挑战。我们之前的研究展示了一种简单的方法将磁性纳米颗粒整合到多孔二氧化硅微球中。在这里，我们报道了嵌入磁性和金纳米颗粒的多孔二氧化硅微球的制备，作为磁性可回收催化剂。所制备的多功能复合微球具有良好的磁性和催化性能，并且具有均匀的尺寸、高的比表面积和大的孔容等结构。结果表明，极少量的复合微球对4-硝基苯酚的催化还原性能良好，磁分离特别方便，使用寿命长，可重复使用。独特的纳米结构使微球成为一种新的稳定和高效的催化剂体系，适用于各种催化工业过程。PACS：61.46-w；75.75.-c；81.07-b
Merging nanoparticles with different functions into a single microsphere can exhibit profound impact on various applications. However, retaining the unique properties of each component after integration has proven to be a significant challenge. Our previous research demonstrated a facile method to incorporate magnetic nanoparticles into porous silica microspheres. Here, we report the fabrication of porous silica microspheres embedded with magnetic and gold nanoparticles as magnetic recoverable catalysts. The as-prepared multifunctional composite microspheres exhibit excellent magnetic and catalytic properties and a well-defined structure such as uniform size, high surface area, and large pore volume. As a result, the very little composite microspheres show high performance in catalytic reduction of 4-nitrophenol, special convenient magnetic separability, long life, and good reusability. The unique nanostructure makes the microspheres a novel stable and highly efficient catalyst system for various catalytic industry processes.PACS:61.46.-w; 75.75.-c; 81.07.-b