TY - JOUR
T1 - Preparation of SiO2/TiO2 Janus particles by electrostatic assembly, hydrolysis and calcination
AU - Zhang, Baoliang
AU - Zhang, Qiuyu
AU - Zhang, Hepeng
AU - Fan, Xinlong
AU - Yin, Dezhong
AU - Li, Xiangjie
AU - Li, Wei
PY - 2013/10
Y1 - 2013/10
N2 - This paper describes a novel chemical method for preparing SiO 2/TiO2 Janus particles. First, polystyrene (PSt)/SiO 2 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/TiO 2 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.
AB - This paper describes a novel chemical method for preparing SiO 2/TiO2 Janus particles. First, polystyrene (PSt)/SiO 2 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/TiO 2 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.
KW - Calcination
KW - Electrostatic assembly
KW - Hydrolysis
KW - Janus particles
UR - http://www.scopus.com/inward/record.url?scp=84882601985&partnerID=8YFLogxK
U2 - 10.1016/j.partic.2012.09.006
DO - 10.1016/j.partic.2012.09.006
M3 - 文章
AN - SCOPUS:84882601985
SN - 1674-2001
VL - 11
SP - 574
EP - 580
JO - Particuology
JF - Particuology
IS - 5
ER -