Hybridization of Photoactive Titania Nanoparticles with Mesoporous Silica Nanoparticles and Investigation of Their Photocatalytic Activity

• Norihiro Suzuki

  World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

• Xiangfen Jiang

  World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

• Logudurai Radhakrishnan

  World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

• Kimiko Takai

  World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

• Kotaro Shimasaki

  Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology (FIT)

• Yu-Tzu Huang

  Department of Bioenvironmental Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University

• Nobuyoshi Miyamoto

  Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology (FIT)

• Yusuke Yamauchi

  World Premier International (WPI) Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS)

抄録

Here we demonstrate that photoactive titania (titanium dioxide) nanoparticles are successfully hybridized with an optimized amount of mesoporous silica (silicon dioxide) nanoparticles to realize drastic improvement of photocatalitic activity of the titania nanoparticles. Various types of mesoporous silica/titania composites are prepared by changing the amounts of doped mesoporous silica. Low-angle XRD patterns and N2 adsorption–desorption isotherms reveal that the original mesostructures and pore sizes of mesoporous silica nanoparticles are well maintained even after hybridization with the titania nanoparticles. From SEM and TEM observation, it is confirmed that both the nanoparticles are homogeneously dispersed in the composite matrix. The obtained mesoporous silica/titania composites show excellent photocatalytic activity in the decomposition of methylene blue (MB), in comparison with titania nanoparticles without mesoporous silica. By hybridization with mesoporous silica, the photogenerated radicals from titania surfaces can efficiently react with many MB molecules captured inside the mesopores.

収録刊行物

• Bulletin of the Chemical Society of Japan

  Bulletin of the Chemical Society of Japan 84 (7), 812-817, 2011-06-25

  Oxford University Press (OUP)

詳細情報

• CRID: 1360846644026945920
• NII論文ID: 130004152940
• DOI: 10.1246/bcsj.20110027
• ISSN: 13480634
• ISSN: 00092673
• Web Site: https://academic.oup.com/bcsj/article-pdf/84/7/812/56272726/bcsj.20110027.pdf
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