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日　時：平成２９年４月１２日（水）　１４：４０～１６：１０
場　所：信州大学繊維学部 講義棟２７番講義室
世話人：杉本　渉（環境・エネルギー材料科学研究所／繊維学部）

講師：Makoto Ogawa教授（VISTEC, Thailand)
題目：Deposition of Nanoporous Silica Layer on Particle Surface
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概要：After the successful preparation of mesostructured and mesoporous silica films on solid supports by the solvent evaporation method, the preparation of mesoporous silica films have been extensively investigated partly due to the wide range of application of mesoporous silica films. The deposition of mesoporous silica layer on powders have also been reported extensively.
Here, we report the deposition of homogeneous nanoporous silica thin layer on a variety of solids surfaces especially micrometer size powders. The present reaction is very simple, where substrates (both plate and powder) were put into a homogeneous solution containing tetraethoxysilane, hexadecyltrimethylammonium chloride, methanol, water and ammonia. The present synthesis is a versatile method to prepare nanoporous silica thin layers on solid substrate especially when the reported procedure is not applicable; substrate with complex morphology and/or unstable in acidic solutions such as hydrotalcite and metal oxides. Mesoporous silica coating is regarded as a way to modify the surface property of powders as well as to impart new functions such as molecular sieving one on catalysts and adsorbents. Moreover, the surface modification of silica shell through grafting is possible to make the application of the core-shell particles more versatile.

講師の紹介：Makoto Ogawa was born in Shizuoka, Japan, in 1964. He received his BS and MS degrees in Applied Chemistry from Waseda University in 1987 and 1989. His doctorate was earned at Waseda University in 1992 under the direction of Professor Chuzo Kato. He moved to The Institute of Physical and Chemical Research (RIKEN) as a special researcher for the basic science program, Science and Technology Agency, Japan. He moved to Department of Earth Sciences, Waseda University in 1995 where he became a Professor in 2004. He was a researcher of PRESTO, Japan Science and Technology Corporation (JST) from 1995 to 2000. From 2014, he moved to Vidyasirimedhi Institute of Science and Technology (VISTEC) as a professor of School of Energy Science and Engineering. Presently, he is a council of International Association for the Study of Clays (AIPEA).
His research interests include the syntheses and applications of layered materials and porous materials and their host-guest systems from the preparation to the application. He has authored more than 200 original research papers and several tens of reviews and book chapters. The number of citation is over 9,000 times and his present h-index is 46.