Aerosol-assisted synthesis of mesoporous organosilica microspheres with controlled organic contents
Yamauchi, Yusuke; Suzuki, Norihiro; Gupta, Prashant; Sato, Keisuke; Fukata, Naoki; Murakami, Miwa; Shimizu, Tadashi; Inoue, Satoru; Kimura, Tatsuo; Yamauchi, Yusuke; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; PRESTO, Japan Science and Technology Agency (JST); Suzuki, Norihiro; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Gupta, Prashant; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan;; Sato, Keisuke; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Fukata, Naoki; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; PRESTO, Japan Science and Technology Agency (JST); Murakami, Miwa; Advanced Nano Characterization Center, NIMS, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan; Shimizu, Tadashi; World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Advanced Nano Characterization Center, NIMS, 3-13 Sakura, Tsukuba, Ibaraki 305-0003, Japan; Inoue, Satoru; Nanoceramics Center, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan; Kimura, Tatsuo; Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Shimoshidami, Moriyama, Nagoya 463-8560, Japan
Журнал:
Science and Technology of Advanced Materials
Дата:
2009-04-01
Аннотация:
Periodic mesoporous organosilica (PMO) spherical particles with different organic contents were synthesized in one pot by reacting 1,2-bis(triethoxysilyl)ethane (BTSE) with tetraethylorthosilicate (TEOS) using a spray-drying technique. The scanning electron microscopy observation of spray-dried products clearly showed the formation of spherical particles. The <sup>29</sup>Si magic angle spinning nuclear magnetic resonance data revealed that the organic contents due to ethane fragments embedded in the frameworks were controllable and consistent with the BTSE/TEOS molar ratios of precursor solutions. Transmission electron microscopy, small-angle x-ray scattering, and N<sub>2</sub> adsorption data of PMO with controlled organic contents indicated that the ethane fragments were embedded in the frameworks with the formation of ordered mesostructures. PMO with a high organic content (BTSE/TEOS=0.50) only showed a hydrophobic property. According to the same procedure, benzene groups were also integrated to a similar degree in the frameworks by using 1,4-bis(triethoxysilyl)benzene.
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