Adsorption of octadecyltrichlorosilane on mesoporous SBA-15

作者：Mirji SA^*; Halligudi SB; Sawant DP; Jacob NE; Patil KR; Gaikwad AB; Pradhan SD

来源：Applied Surface Science, 2006, 252(12): 4097-4103.

DOI：10.1016/j.apsusc.2005.06.009

• SBA-15
• OTS
• self-assembly
• adsorption
• thermal stability

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.

• 出版日期2006-4-15