Preparation of porous hollow SiO2 spheres by a modified stober process using MF microspheres as templates

Liu, Hui, Li, Hongliang, Ding, Zhaolong, Fu, Aiping, Wang, Hongyan, Guo, Peizhi, Yu, Jianqiang, Wang, Cunguo and Zhao, Xiu Song (2012) Preparation of porous hollow SiO2 spheres by a modified stober process using MF microspheres as templates. Journal of Cluster Science, 23 2: 273-285. doi:10.1007/s10876-011-0427-x


Author Liu, Hui
Li, Hongliang
Ding, Zhaolong
Fu, Aiping
Wang, Hongyan
Guo, Peizhi
Yu, Jianqiang
Wang, Cunguo
Zhao, Xiu Song
Title Preparation of porous hollow SiO2 spheres by a modified stober process using MF microspheres as templates
Journal name Journal of Cluster Science   Check publisher's open access policy
ISSN 1040-7278
1572-8862
Publication date 2012-06
Year available 2012
Sub-type Article (original research)
DOI 10.1007/s10876-011-0427-x
Volume 23
Issue 2
Start page 273
End page 285
Total pages 13
Place of publication New York, NY, United States
Publisher Springer
Collection year 2013
Language eng
Formatted abstract
Using the surface charged and acid dissolvable melamine formaldehyde (MF) microspheres as sacrificial hard templates, silica coated MF core-shell composite microspheres, denoted as MF@SiO 2, were synthesized via a surfactant-assisted sol-gel process by using tetraethyl orthosilicate (TEOS) as silica source. Hollow SiO 2 spheres with mesoporous shells were then obtained after selective removal of the MF cores and the pore directing surfactant by hydrochloric acid etching or calcinations in air. Interesting shrinkage phenomena were observed in both the hollow products derived from hydrochloric acid etching and calcinations. The influence of the ratio of MF sphere to TEOS and the removal method of the MF core on the size of the hollow spheres, the shell thickness and the shell surface roughness have been studied. The composition, the thermal stability, the morphology, the surface area and pore size distribution, the wall thickness and adsorption properties of the hollow spheres derived from hydrochloric acid etching and calcinations were also investigated and compared based on the FTIR, SEM, TEM, TGA, Nitrogen adsorption-desorption and spectrophotometer techniques or measurements.
Keyword Hollow spheres
MF microspheres
Electrostatic assembly
Mesoporous materials
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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