مشخصات پژوهش

عنوان	Well-Shaped Sulfonic Organosilica Nanotubes with High Activity for Hydrolysis of Cellobiose
نوع پژوهش	مقاله چاپ‌شده در مجلات علمی
کلیدواژه‌ها	sulfonic solid acid catalysts; organosilica nanotubes; hydrolysis of cellobiose; acid density
چکیده	Sulfonic organosilica nanotubes with different acidity densities could be synthesized through the co-condensation of ethenyl- or phenylene-bridged organosilane and 3-mercaptopropyltrimethoxysilane followed by sulfhydryl (–SH) oxidation. Transmission electron microscopy (TEM) analysis and nitrogen adsorption-desorption experiment clearly exhibit the hollow nanotube structures with the diameters of about 5 nm. The compositions of the nanotube frameworks are confirmed by solid state 13C nuclear magnetic resonance (NMR) while X-ray photoelectron spectroscopy (XPS) shows that about 60–80% of SH groups were oxidized to sulfonic acid (SO3H). The acid contents were measured by both elemental analysis (CHNS mode) and acid-base titration experiment, which revealed that the acid density was in the range of 0.74 to 4.37 µmol·m−2 on the solid. These nanotube-based acid catalysts exhibited excellent performances in the hydrolysis of cellobiose with the highest conversion of 92% and glucose selectivity of 96%. In addition, the catalysts could maintain high activity (65% conversion with 92% selectivity) even after six recycles.
پژوهشگران	جینوا هان (نفر ششم به بعد)، صادق رستم نیا (نفر پنجم)، هوآ ونگ (نفر چهارم)، شین لی ژو (نفر سوم)، شیائو لیو (نفر دوم)، Jing Sun (نفر اول)