Particle size and pore adjustment of dendritic mesoporous silica using different long alkyl-chain imidazolium ionic liquids as templates
Particle size and pore adjustment of dendritic mesoporous silica using different long alkyl-chain imidazolium ionic liquids as templates
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不同长烷基链咪唑离子液体为模板树枝状介孔二氧化硅的粒径及孔径调节
DOI：
10.1016/j.micromeso.2022.112249
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发表时间：
2022-09
影响因子：
5.2
通讯作者：
Hongdeng Qiu
中科院分区：
文献类型：
--
作者：
Xiaomin Yang;Kaijun Quan;Juanjuan Wang;Jianfei Liu;Bei Liu;Jia Chen;Ming Guan;Hongdeng Qiu
在介观尺度上对树枝状介孔二氧化硅纳米粒子（DMSNs）的孔结构进行精细调控是一个挑战，但非常重要。本文利用咪唑离子液体（CxMImBr：x = 12、14、16、18、20和22）的结构可设计性，合成了一系列不同烷基链长的咪唑离子液体（CxMImBr：x = 12、14、16、18、20和22）作为结构导向剂，并研究了DMSNs的粒径和孔径调节作用。通过对烷基链长、摩尔质量、配比的合理调节，可以实现对单分散DMSNs孔径（2-21 nm）和粒径（200-500 nm）的精细控制。在此基础上，通过合理设计反应条件，可以进一步实现孔径和粒径的独立控制。本研究为多尺度、多层次DMSNs材料的构建提供了一种可控的方法。·以不同的离子液体为模板制备树枝状介孔氧化硅。·介孔二氧化硅的孔径可以在2-21 nm范围内精细调节。·可以进一步独立地控制孔径和粒度。·提出了一种用于调控树枝状介孔二氧化硅结构的多尺度方法。
The fine-tuning of the pore structure on the mesoscopic scale of dendritic mesoporous silica nanoparticles (DMSNs) is a challenge but very important. In this work, a series of imidazolium ionic liquids (ILs) with different alkyl chain lengths (named CxMImBr: x = 12, 14, 16, 18, 20, and 22, respectively) were synthesized as structure-directing agents based on the highly designable structural advantages of ILs, and the particle size and pore adjustment of DMSNs was investigated. Through the reasonable regulation of alkyl chain length, molar mass, and ratio, it can realize the fine control of monodisperse DMSNs pore size (2–21 nm) and particle size (200–500 nm). On this basis, the pore size and particle size can be further controlled independently by reasonable design of reaction condition. This study provides a controlled way to construct multi-scale and multi-level DMSNs materials. • Different ionic liquids used as template to prepare dendritic mesoporous silica. • The pore size of mesoporous silica can be finely regulated in the range of 2–21 nm. • The pore size and particle size could be further controlled independently. • A multi-scale method proposed for regulating dendritic mesoporous silica structure.
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