Adsorption of octadecyltrichlorosilane on mesoporous SBA-15

被引：31
|
作者：
Mirji, S. A. [1 ]
Halligudi, S. B.
Sawant, Dhanashri P.
Jacob, Nalini E.
Patil, K. R.
Gaikwad, A. B.
Pradhan, S. D.
机构：
[1] Natl Chem Lab, Div Phys Chem, Pune 411008, Maharashtra, India
[2] Natl Chem Lab, Inorgan & Catalysis Div, Pune 411008, Maharashtra, India
[3] Natl Chem Lab, Ctr Mat Characterizat, Pune 411008, Maharashtra, India
来源：
APPLIED SURFACE SCIENCE | 2006年 / 252卷 / 12期
关键词：
SBA-15; OTS; self-assembly; adsorption; thermal stability;
D O I：
10.1016/j.apsusc.2005.06.009
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Adsorption of octadecyltrichlorosilane (OTS) on mesoporous SBA-15 has been studied by using Brunauer-Emmett-Teller (BET) surface area analysis, scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and thermo-gravimetric analysis (TGA) techniques. BET surface area analysis shows decrease of surface area from 930 to 416 m(2)/g after OTS adsorption. SEM pictures show close attachment of SBA-15 particles. EDAX measurements show increase of carbon weight percentage and decrease of oxygen and silicon weight percentage. XPS results closely support EDAX analysis. FTIR spectra shows presence of methyl (-CH3) and methylene (-CH2) bands and oriented OTS monolayer on SBA-15. Thermo-gravimetric analysis shows that the OTS adsorbed on SBA-15 are stable up to a temperature of 230 degrees C and that the OTS monolayers decompose between 230 and 400 degrees C. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：4097 / 4103
页数：7
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