کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
75098 49108 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A mild method to remove organic templates in periodic mesoporous organosilicas by the oxidation of perchlorates
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
A mild method to remove organic templates in periodic mesoporous organosilicas by the oxidation of perchlorates
چکیده انگلیسی

A new method of ammonium perchlorate (AP) oxidation has been developed to remove organic templates of mesoporous materials at relatively low temperature (80–120 °C). Periodic mesoporous organosilicas (PMOs) with ethane-bridged prepared by using triblock copolymers P123 as a template are chosen as an example to demonstrate the AP treatment method. The resultant template-free PMO-80 products at 80 °C have a larger pore size (7.2 nm) and volume (1.40 cm3/g) compared to solvent-extracted sample (6.9 nm and 1.06 cm3/g). No framework shrinkage is observed based on XRD results. TEM images show that PMO-80 sample has a highly ordered mesostructure. This template removal strategy can be extended to prepare other nanoporous materials like pure mesoporous silicas.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 118, Issues 1–3, 1 February 2009, Pages 513–517
نویسندگان
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