DENG Nan，WANG Yujun

(State Key Laboratory of Chemical Engineering,Tsinghua University,Beijing 100084，China)

Abstract: In order to save titanium resources and improve the quality of titanium oxide products,the preparation of core-shell BaSO4-TiO2 composite particles was conducted. Firstly,the BaSO4 particles were prepared using a membrane disperser and controlled by disodium edetate(EDTA-2Na). BaSO4 obtained by this method was used as a core,and ammonia water and tetrabutyl titanate(TBOT) were used as raw materials,and TiO2 was coated by solvothermal method. The results show that，at 25 ℃,the solution of BaCl2 and EDTA-2Na is used as the dispersed phase,and the Na2SO4 solution is the continuous phase. When the two-phase flow rate is 10 ∶10 or 20 ∶20,the concentration of EDTA-2Na is 0.08 mol/L or 0.1 mol/L,and the concentration of BaCl2 and Na2SO4 is 0.1 mol/L,BaSO4 spherical particles are prepared with a small particle size,good dispersibility and narrow distribution. At 120 ℃,when the amount of ammonia water and TBOT is increased to 0.4 mL or more,a core-shell type composite TiO2 could be obtained.

Keywords: spherical particle; disodiumedetate; titanium dioxide; core-shell structure; membrane dispersed

中图分类号：TQ13                               文献标志码：A

文章编号：1008-5548(2020)01-0001-08

DOI:10.13732/j.issn.1008-5548.2020.01.001

收稿日期： 2019-02-20，修回日期：2019-04-07，在线出版时间：2019-07-25 16:16。

第一作者简介：邓南(1996—)，男，硕士研究生，研究方向为微反应器纳米材料的制备。E-mail：dengn14@126.com。

通信作者简介：王玉军(1973—)，男，博士，教授，博士生导师，研究方向为膜分离及膜反应分离一体化技术、高效分离材料制备。E-mail：wangyujun@mail.tsinghua.edu.cn 。