| عنوان
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Well-Shaped Sulfonic Organosilica Nanotubes with High Activity for Hydrolysis of Cellobiose
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| عنوان مجله
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Catalysts
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| نوع پژوهش
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مقاله چاپ شده
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| کلیدواژهها
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sulfonic solid acid catalysts; organosilica nanotubes; hydrolysis of cellobiose; acid density
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| چکیده
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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.
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| پژوهشگران
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JingSun (نفر اول)، شیائولیو (نفر دوم)، شین لیژو (نفر سوم)، هوآونگ (نفر چهارم)، صادقرستم نیا (نفر پنجم)، جینواهان (نفر ششم به بعد)
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