文献类型：期刊文献

英文题名：Accelerated and simplified synthesis of magnetic mesoporous nanoparticles in a continuous multistep microfluidic system

作者：Fan, Wenting[1];Zhao, Fang[1];Chen, Ming[1];Li, Jian[1];Guo, Xuhong[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：181

外文期刊名：CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION

收录：;EI(收录号：20223512627389);WOS:【SCI-EXPANDED(收录号:WOS:000860373100005)】；

基金：We gratefully thank the financial support from National Natural Science Foundation of China (21808059 and 51773061) .

语种：英文

外文关键词：Continuous flow system; Multistep synthesis; Magnetic mesoporous nanoparticles; Process intensification

摘要：Here a fully continuous flow strategy for the preparation of Fe3O4@nSiO(2)@mSiO(2) nanocomposites starting from ferrous and ferric ions was established for the first time. The three synthetic steps for Fe(3)O(4 )core, nonporous silica middle shell and mesoporous silica outer shell were connected and integrated into a single flow sequence with a total residence time of approximately 3 min. Moreover, the multistep continuous flow system was simplified with smaller footprint and increased safety by feeding all the ammonia needed by the three synthetic steps only once at the starting point of the system. The final product Fe3O4@nSiO(2)@mSiO(2) nanoparticles with a specific surface area 378 m(2) g(-1) and saturation magnetization 19.3 emu g(-1) showed great potential as a catalyst support with easy and excellent recyclability. Proved to be capable of achieving fast and accurate parameter optimization, the uninterrupted continuous flow system proposed in this work holds great prospects to mediate multistep synthesis of complex nanoparticles with hierarchical structures in an efficient and controllable manner.