Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry

Dou, Baojuan, Hu, Qin, Li, Jinjun, Qiao, Shizhang and Hao, Zhengping (2011) Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry. Journal of Hazardous Materials, 186 2-3: 1615-1624. doi:10.1016/j.jhazmat.2010.12.051


Author Dou, Baojuan
Hu, Qin
Li, Jinjun
Qiao, Shizhang
Hao, Zhengping
Title Adsorption performance of VOCs in ordered mesoporous silicas with different pore structures and surface chemistry
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
1873-3336
Publication date 2011-02
Year available 2010
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2010.12.051
Volume 186
Issue 2-3
Start page 1615
End page 1624
Total pages 10
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2012
Language eng
Abstract Ordered mesoporous silicas with different pore structures, including SBA-15, MCM-41, MCM-48 and KIT- 6, were functionalized with phenyltriethoxysilane by a post-synthesis grafting approach. It was found that phenyl groups were covalently anchored onto the surface of mesoporous silicas, and the long-range ordering of the mesoporous channels was well retained after the surface functionalization. The static adsorption of benzene and the dynamic adsorption of single component (benzene) and bicomponent (benzene and cyclohexane) on the original and functionalized materials were investigated. As indicated by the adsorption study, the functionalized silicas exhibit improvement in the surface hydrophobicity and affinity for aromatic compounds as compared with the original silicas. Furthermore, the pore structure and the surface chemistry of materials can significantly influence adsorption performance. A larger pore diameter and cubic pore structure are favorable to surface functionalization and adsorption performance. In particular, the best adsorption performance observed with phenyl-grafted KIT-6 is probably related to the highest degree of surface functionalization, arising from the relatively large mesopores and bicontinuous cubic pore structure which allow great accessibility for the functional groups. In contrast, functionalized MCM-41 exhibits the lowest adsorption efficiency, probably owing to the small size of mesopores and 1D mesoporous channels.
Keyword Ordered mesoporous silicas
Functionalization
Pore structure
Hydrophobicity
VOCs adsorption
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Published online 17 December 2010

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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