Synthesis and hydrophobic adsorption properties of microporous/mesoporous hybrid materials

Hu, Qin, Qiao, Shizhang, Hao, Zhenping, Tian, Hua, Ma, Chuyan and He, Chi (2009) Synthesis and hydrophobic adsorption properties of microporous/mesoporous hybrid materials. Journal of Hazardous Materials, 164 2-3: 1205-1212. doi:10.1016/j.jhazmat.2008.09.023


Author Hu, Qin
Qiao, Shizhang
Hao, Zhenping
Tian, Hua
Ma, Chuyan
He, Chi
Title Synthesis and hydrophobic adsorption properties of microporous/mesoporous hybrid materials
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 0304-3894
Publication date 2009-05-01
Year available 2008
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2008.09.023
Open Access Status
Volume 164
Issue 2-3
Start page 1205
End page 1212
Total pages 8
Place of publication Netherlands
Publisher Elsevier BV
Language eng
Subject C1
0907 Environmental Engineering
Abstract Hybrid materials of silicalite-1 (Sil-1)-coated SBA-15 particles (MSs) have been successfully synthesized by crystallization process under hydrothermal conditions. These MSs materials were characterized by X-ray diffraction, nitrogen adsorption/desorption and TEM techniques, which illustrated that the silicalite-1-coated SBA-15 particles were successfully prepared and had large pore volume and hierarchical pore size distribution. Further experimental studies indicated that longer crystallization time under basic condition caused the mesostructure of SBA-15 materials to collapse destructively and higher calcination temperature tended to disrupt the long-range mesoscopic order while they had little influence on the phase of microcrystalline silicalite-1 zeolite. The resultant MSs materials were investigated by estimating dynamic adsorption capacity under dry and wet conditions to evaluate their adsorptive and hydrophobic properties. The hydrophobicity index (HI) value followed the sequence of silicalite-1 > MSs > SBA-15, which revealed that the SBA-15 particles coated with the silicalite-1 seeds enhanced the surface hydrophobicity, and also were consistent with FTIR results. Our studies show that MSs materials combined the advantages of the ordered mesoporous material (high adsorptive capacity, large pore volume) and silicalite-1 zeolite (super-hydrophobic property, high hydrothermal stability), and the presence of micropores directly led to an increase in the dynamic adsorption capacity of benzene under dry and wet conditions.
Keyword SBA-15
Silicalite-1
Hybrid materials
Hydrophobic property
Dynamic adsorption
Q-Index Code C1
Q-Index Status Confirmed Code
Grant ID 20725723
2006AA06A310
Institutional Status UQ

 
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Created: Sat, 06 Jun 2009, 01:35:37 EST by Siona Saplos on behalf of Office of Sponsored Research