Abstract
Well-ordered and stable two dimensional mesoporous silica, SBA-15, was synthesized at room temperature (RT) from a silatrane precursor and a non-ionic triblock copolymer (EO20PO70EO20) as the structure-directing agent. Using a combination of small angle X-ray scattering, electron microscopy, and nitrogen gas absorption–desorption isotherms, the RT product was found to be equivalent to SBA-15 prepared using more elaborative microwave-assisted hydrothermal methods. Both synthesis routes yielded large surface areas (486–613 m2/g), pore diameters (45–67 Å) and channel volumes (0.6–0.8 cm3/g). All materials condensed as sinuous bundles of silica tubes in a morphology that approximates p6mm symmetry, but where long range order was absent. In addition, portions of the products consisted of fine crystalline mosaics or were aperiodic. The simplicity of the room temperature synthesis route may create an inexpensive and energy-saving process for the large scale production of thermally stable SBA-15 as a catalyst support.
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Acknowledgments
This research is financially supported by the Postgraduate Education and Research Program in Petroleum and Petrochemical Technology (ADB) Fund (Thailand), the Ratchadapisake Sompote Fund, Chulalongkorn University; and, the Thailand Research Fund (TRF). We thank Mr. Tan Teck Siong for assistance in collecting the secondary electron images, and the School of Materials Science & Engineering NTU for the partially financial support. Special thanks go to Mr. Robert Wright for the English proofreading.
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Samran, B., White, T.J. & Wongkasemjit, S. A novel room temperature synthesis of mesoporous SBA-15 from silatrane. J Porous Mater 18, 167–175 (2011). https://doi.org/10.1007/s10934-010-9367-3
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DOI: https://doi.org/10.1007/s10934-010-9367-3