کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
55767 | 47063 | 2011 | 5 صفحه PDF | دانلود رایگان |
Hydrophobic modification of single-site Ti-oxide moieties containing mesoporous silica (TiSBA-15) surfaces was performed by using triethoxyfluorosilane (TEFS) as a silylation reagent. The pore structure as well as the high surface area of TiSBA-15 was retained even after modification of these surfaces. TiSBA-15 modified with suitable amount of TEFS exhibited higher catalytic performance for the selective oxidation of cyclooctene to 1,2-epoxy cyclooctane using aqueous H2O2 as an oxidant than the unmodified TiSBA-15. The improvement of surface hydrophilic–hydrophobic properties of TiSBA-15 is quite effective for the enhancement of catalytic activity.
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► The post functionalization by TEFS enables to improve the surface hydrophilic–hydrophobic properties of TiSBA-15.
► The mesoporous structure of TiSBA-15 and local structure of single-site Ti-oxide moieties are retained even after surface modification.
► The grafting of suitable amount of TEFS onto TiSBA-15 is effective for enhancement of catalytic performances for the selective epoxidation of cyclooctene using aqueous H2O2.
Journal: Catalysis Today - Volume 175, Issue 1, 25 October 2011, Pages 393–397