En
期刊文章
文章精选
当期目录
过刊浏览
高被引
高下载
特邀文章
专刊合集
待刊文章
Volume 11 Issue 5
您当前的位置：首页 > 期刊文章 > 过刊浏览 > Volume 11 (2013) > Volume 11 Issue 5
Zhang, B., Zhang, Q., Zhang, H., Fan, X., Yin, D., Li, X., & Li, W. (2013). Preparation of SiO2/TiO2 Janus particles by electrostatic assembly, hydrolysis and calcination. Particuology, 11(5), 574–580. https://doi.org/10.1016/j.partic.2012.09.006
Preparation of SiO2/TiO2 Janus particles by electrostatic assembly, hydrolysis and calcination
Baoliang Zhang, Qiuyu Zhang *, Hepeng Zhang, Xinlong Fan, Dezhong Yin, Xiangjie Li, Wei Li
Department of Applied Chemistry, College of Science, Northwestern Polytechnical University, Xi’an 710072, China
10.1016/j.partic.2012.09.006
Volume 11, Issue 5, October 2013, Pages 574-580
Received 4 July 2012, Revised 28 August 2012, Accepted 25 September 2012, Available online 8 February 2013.
E-mail: qyzhang@nwpu.edu.cn
Highlights

► A novel method for preparing Janus particles was proposed. 

► PSt/SiO2 particles with raspberry-like structure were obtained via electrostatic assembly. 

► SiO2/TiO2 Janus particles were prepared.

Abstract

This paper describes a novel chemical method for preparing SiO2/TiO2 Janus particles. First, polystyrene (PSt)/SiO2 particles with a raspberry-like structure are prepared by electrostatic assembly. The influences of the reaction time of sulfonation and the treatment times of polyelectrolyte solutions (PDADMAC, PSS) on PSt and SiO2 are investigated with respect to the surface charge density of the particles. SiO2/TiO2 Janus particles are then obtained by hydrolysis of butyl titanate on the surface of PSt/SiO2 particles followed by a calcination process. Particle size analyzer, Zeta potential instrument, FTIR, TEM and SEM are used to characterize the particle size, the amount of charge on the surface of PSt and SiO2 particles and the compositions and morphologies of PSt/SiO2, SiO2/TiO2 and PSt/SiO2/TiO2. The diameters of the PSt, SiO2, PSt/SiO2 and SiO2/TiO2 particles are 2.0 μm, 303 nm, 2.7 μm and 330 nm, respectively.

Graphical abstract
Keywords
Janus particles; Electrostatic assembly; Hydrolysis; Calcination
文章导读