کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
55982 47068 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
3D net-linked mesoporous silica monolith: New environmental adsorbent and catalyst
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
3D net-linked mesoporous silica monolith: New environmental adsorbent and catalyst
چکیده انگلیسی

This paper reported the synthesis, characterization, adsorption and catalysis of new morphology-assisted functional SBA-15, the 3D net-linked mesoporous silica monolith, and its actual function in selective reducing tobacco specific nitrosamines (TSNA) level of smoke, in order to explore the new route elevating the efficiency of environment adsorbents/catalysts through their morphology controlling. It is feasible to control the hydrolization and condensation of silica source in synthesis, and then piloting the formation and the secondary arrangement of primary particles, finally forming the monolith with 3D net-linked morphology. The resulting sample not only had the shape of monolith, but also possessed a considerable mechanical intensity hence it could be directly sieved for use without molding. With the assistant of net-linked morphology, this monolith sample could intercept the particles with μm sizes in tobacco smoke, and selectively capture the TSNA adhered on the particle, providing new functional material for environment protection. Through dry-impregnation it is also successful to modify the monolith with zirconia guest without damage of 3D net-linked morphology, dramatically increasing the activity of the composite in the instantaneous adsorption of volatile nitrosamine such as N-nitrosopyrrolidine (NPYR) and the temperature programmed surface reaction (TPSR) of N′-nitrosonornicotine (NNN), offering a powerful environmental catalyst to degrade carcinogenic pollutants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Catalysis Today - Volume 166, Issue 1, 30 May 2011, Pages 39–46
نویسندگان
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