CAO Yongjie,LIU Wei,CHEN Aiping,JIANG Haibo,LI Chunzhong

(a.College of Materials Science and Engineering;b.Key Laboratory for Ultrafine Materials of Ministry Preparation and Application of Education，East China University of Science and Technology,Shanghai 200237,China)

Abstract:Micron-sized spherical porous silica was prepared through the stages of carbonization,aging,and spray drying,using environment-friendly gas carbon dioxide and cheap silicon source water glass by self-made mixed reactor,and characterized by laser particle size analyzer,scanning electron microscope,and transmission electron microscope.The results show that the prepared porous silica microspheres have regular spheres,good dispersibility and narrow particle size distribution.The pore volume is 0.42-1.53 cm³/g,the specific surface area is 97.4-375.4 m³/g,and the structure is mesoporous.The particles size is 8.44-28.58 μm,and the surface is smooth.The spherical porous silica is formed in the spray drying stage,and the lower sodium silicate concentration and slower condensation reaction are the basis for the spherical formation.The method is helpful for large-scale green production of spherical silica and its further functionalization research.

Keywords:carbonization method；reactor；micron-sized silica；spheroidization

中图分类号： TQ630.7+1                          文献标志码：A

文章编号：1008-5548(2022)02-0121-12

DOI:10.13732/j.issn.1008-5548.2022.02.015

收稿日期： 2021-05-18，修回日期：2021-06-22，在线出版时间;2022-02-18。

基金项目：国家自然科学基金项目，编号：21838003，91834301；上海市优秀学术带头人计划项目，编号：19XD1401400；中央高校基本科研业务费专项资金资助项目，编号：222201718002。

第一作者简介：曹永杰(1995—)，男，硕士研究生，研究方向为球形二氧化硅的制备及其应用。E-mail：2577232406@qq.com。

通信作者简介：姜海波(1972—)，男，博士，副研究员，硕士生导师，研究方向为新型纳米材料合成、结构调控和过程放大等。E-mail：jianghaibo@ecust.edu.cn。