Kazuyuki KURODA

Kazuyuki KURODA

  • Inorganic Chemistry
  • Professor
  • Office: Room 65-405
  • Phone: +81-3-5286-3199
  • Fax: +81-3-5286-3199
  • Email : kuroda@waseda.jp

Research Interests

The aim of our team is to create novel functional materials with highly organized structures on the nano- and meso-scales. Motivated by the current situations of the environment, energy, and resources, we have positioned mesoscale materials design of inorganic-organic systems utilizing molecular assemblies as one of the main subjects of our research, which we believe will lead to creation of a new field of chemistry.

Preparation of mesostructured materials with highly controlled compositions and structures

1) Mesoporous materials have attracted keen interest because of their wide range of potential applications, including use as adsorbents and catalysts. Mesoporous silica was first prepared from layered silicates by reaction with quaternary organoammonium salts and the subsequent removal of the surfactants. By reflecting the framework of the silicates, preparation of mesoporous silica with molecularly ordered frameworks with squared one-dimensional channels was proved, which is one advantage of this method.
2) We are currently investigating preparation of mesoporous silica films with uniaxially oriented mesochannels. Such mesoporous silica films can be prepared by using anisotropic surfaces on substrates or in a highly magnetic field. Films with mesochannels aligned both parallel and perpendicular to substrates have been prepared. Guest substances, incorporated into the aligned mesochannels, have shown anisotropic characteristics macroscopically. The alignment of the mesochannels is also demonstrated through collaborative top-down and bottom-up approaches. Mesochannels can be aligned along walls formed by lithographic techniques. This approach is applicable to various systems.
3) Mesoporous metals and alloys with various pore sizes, compositions, structures, and morphologies can be prepared by utilizing lyotropic liquid crystals.
4) Organotrialkoxysilanes with long-chain alkyl groups can be converted to silica-based hybrid nanostructured materials with ordered structures by self-organization. By designing starting organosilanes, we can tailor hybrid materials with various nanostructures and morphologies.

Mesoscale materials design utilizing layered materials

Layered materials can be regarded as inorganic polymers with sheet structures. Various molecules and ions are intercalated into the interlayer spaces to form mesoscale inorganic-organic mesostructures with anisotropic characteristics. A bottom-up approach to constructing novel silicate frameworks can be realized by interlayer surface silylation of layered octosilicate by alkoxychlorosilanes. Nanosheets and nanotubes can be prepared from various inorganic layered materials.

FIGURES

img_01-5
Ideal structure (left) and TEM image (right) of mesoporous silica with squared channels
img_02-3
Ideal structure (left) and TEM image (right) of mesoporous silica with squared channels

Biography

B.S. Waseda University (1974); Ph.D., Waseda University (1979); Research Associate, Waseda University (1979-1982); British Council Scholarship, University of Aberdeen (1980-1981); Assistant Professor, Waseda University (1982-1984); Associate Professor, Waseda University (1984-1989); Professor, Waseda University (1989-); He has been appointed as an affiliated professor of Stockholm University since 2007. He was a principal investigator for the CREST program (JST; 2002-2007). He is currently President of International Mesostructured Materials Association. He also serves as an editor of Microporous & Mesoporous Materials (official journal Int. Zeolite Assoc.). His primary research interest is in materials chemistry at nano- and meso-length scales, including materials synthesis based on inorganic-organic interactions. He has received several awards including the award of Synthetic Chemistry of Catalysts (1994), the Clay Science Society of Japan Award (1996) and the academic award of the Ceramic Society of Japan (2007).

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