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Okada Tomohiko

Academic OrganizationAcademic Assembly School of Science and Technology Institute of EngineeringTEL
Education and Research OrganizationInterdisciplinary Cluster for Cutting Edge Research Research Initiative for Supra-MaterialsFAX
PositionAssociate ProfessorMail Addresstomohiko(at)
Address4-17-1 Wakasato, Nagano 380-8553, JapanWeb site


Research Field
Material Chemistry
Inorganic-organic hybrids
Current Subject
Adsorptive properties of inorganic-organic nanocomposites
Keywords:Clay-organic intercalation compounds , Hollow Polyorganosiloxanes
Preparation of heterogeneous catalysts
Keywords:Metal or Metal Oxide Supported Hollow Silica , Nanoporous solids , Steam Reforming , Acid Solids
Dechlorination of poly(vinyl chloride) and reusing as solid-acid catalysts
Keywords:Zinc(II) Oxide , plastics
Magnetic properties of the hollow silica occulding magnetic nanoparticles
Keywords:Catalyst supports with magnetic recovery , Magnetite , Cobalt
Academic Background
Graduate School
Waseda Univ. , (Graduate School of Sci.&Eng.) , 2004
Waseda Univ. , (Graduate School of Sci.&Eng.) , 2001

Waseda Univ. , (Dept. Earth Sciences) , 1999

Dr.Sci. , Waseda Univ.
Research Career
Research Career
2015- , Shinshu Univ. Associate Professor
2007-2015 , Shinshu Univ. Assistant Professor
2006-2007 , Shinshu Univ. Research Associate
2004-2006 , Waseda Univ. Research Associate


Books, Articles, etc.
Adsorbents derived from layered solids
Springer , Inorganic Nanosheets and Nanosheet-Based Materials, Ed. by Nakato, T., Kawamata, J., Takagi, S. , :263-301 2017
Author:Okada, T., Ogawa, M.

Inorganic–organic interactions
Springer , Inorganic Nanosheets and Nanosheet-Based Materials, Ed. by Nakato, T., Kawamata, J., Takagi, S. , :163-186 2017
Author:Okada, T., Ogawa, M.

Immobilization of Organic Dyes on Clays Toward Controlled Photoinduced Events
The Clay Minerals Society Workshop Lectures Series (Materials and Clay Minerals) , 18:1-20 2014
Author:Ogawa, M., Sohmiya, M., Kakegawa, N., Okada, T.

Hydrated silicate layer formation on mica-type crystals
Langmuir,36:4933-4941 2020
Author:Sugiura, M., Sueyoshi, M., Seike, R., Hayashi, T., Okada, T.

A useful method for thorough dehydrochlorination of Poly(vinylidene chloride-co-vinyl chloride) using Zinc(II) oxide
Polym. Degrad. Stab.,171:109040 2020
Author:Okada, T., Sutoh, S., Sejima, K., Tomohara, H., Mishima, S.

Functional groups of organochlorosilanes influenced microporous structure in organosiloxane microcapsules synthesized using a water-in-oil emulsion template
Bull. Chem. Soc. Jpn.,92(5):912-917 2019
Author:Okada, T., Aizawa, T.

A Study of Stereoselective Adsorption in Smectites Using Thin-Layer Chromatography
Appl. Clay Sci.,70:13-20 2019
Author:Tajima, K., Okada, T.

Pore shape-reflecting morphosynthesis of lithium niobium oxide via mixed chloride flux growth in the presence of mesoporous silica.
Nanoscale Adv.,1:1726-1730 2019
Author:Sohmiya, M., Umehara, S., Enomoto, S., Ide, Y., Okada, T., Sugahara, Y., Ogawa, M.

Uniform-sized Silica Nanocapsules Produced by Addition of Salts to a W/O Emulsion Template
Langmuir,34:9500-9506 2018
Author:Okada, T.; Koide, T.

Variation in thickness of a layered silicate on spherical silica particles affected HPLC chiral chromatographic resolution.
Appl. Clay Sci.,163:72-80 2018
Author:Okada, T., Oguri, M., Tajima, K., Yamakami, T., Sato, H.,

Crystal Growth of Layered Silicate Grafted with Organic Groups on Monodisperse Spherical Silica Particles.
Clays Clay Miner.,66(2):104-113 2018
Author:Yamauchi, M., Okada, T.

Effect of particle size and local disorder on specific surface area of layered double hydroxides upon calcination-reconstruction.
J. Solid State Chem.,263:60-64 2018
Author:Kim, B.-K., Gwak, G.-H., Okada, T., Oh, J.-M.

Direct Crystallization of Layered Silicates on the Surface of Amorphous Silica
Chem. Rec.,18:829-839 2018
Author:Okada, T.

Photoluminescence by Intercalation of a Fluorescent β-Diketone Dye into a Layered Silicate
Langmuir,33:13515-13521 2017
Author:Hirose, M., Ito, F., Shimada, T., Takagi, S., Sasai, R., Okada, T.

Kinetics of Interlayer Expansion of a Layered Silicate Driven by Caffeine Intercalation in the Water Phase Using Transmission X–ray Diffraction
J. Phys. Chem. B,121:6919-6925 2017
Author:Okada, T., Yoshida, T., Iiyama, T.

Photoinduced structural changes of cationic azo dyes confined in two dimensional nanospace by two different mechanisms
RSC Adv.,7:8077-8081 2017
Author:Okada, T., Nozaki, N., Seo, J., Kwon J. E., Park, S. Y., Hashizume, H. Sasaki, T., Ogawa, M.

Effects of fluoride and urea on the crystal growth of a hectorite-like layered silicate on a silica surface
Appl. Clay Sci.,132-133:320-325 2016
Author:Okada, T., Kobari, H., Haeiwa, T.

Water-Floatable Organosilica Particles for TiO2 Photocatalysis
Chem. Eng. J.,299:367-372 2016
Author:Maki, Y.; Ide, Y.; Okada, T.

Application of Hectorite-Coated Silica Gel Particles as a Packing Material for Chromatographic Resolution
J. Chromatogr. Sci.,54:1238-1243 2016
Author:Okada, T., Kumasaki, A., Shimizu, K., Yamagishi, A., Sato, H.

An Inorganic Anionic Polymer Filter Disc: Direct Crystallization of a Layered Silicate Nanosheet on a Glass Fiber Filter
RSC Adv.,6:26130-26136 2016
Author:Okada, T., Shimizu, K., Yamakami, T.

In situ crystallization of Al-containing silicate nanosheets on monodisperse amorphous silica microspheres
Langmuir,31:13842-13849 2015
Author:Okada, T., Sueyoshi, M., Minamisawa, H. M.

Crystal growth of a hectorite-like layered silicate on monodisperse spherical silica particles with different diameters
Clay Sci.,19:45-51 2015
Author:Okada, T., Suzuki, A.,

Crystal architectures of a layered silicate on monodisperse spherical silica particles cause the topochemical expansion of the core-shell particles
Microporous Mesoporous Mater.,215:168-174 2015
Author:Okada, T.; Suzuki, A.; Yoshido, S.; Minamisawa, H. M.

Preparation of Porous Thin-film Polymethylsiloxane Microparticles in a W/O Emulsion System.
Polym. J.,47:449-455 2015
Author:Mishima, S., Okada, T., Sakai, T., Kiyono, R., Haeiwa, T.

Photochromic intercalation compounds
Struct. Bond.,166:177-211 2015
Author:Okada, T., Sohmiya, M., ,Ogawa, M.,

Organoclays in water cause expansion that facilitates caffeine adsorption
Langmuir,31:180-187 2015
Author:Okada, T., Oguchi, J., Yamamoto, K., Shiono, T., Fujita., M., Iiyama, T.

Concentration of 2-Phenylphenol by Organoclays from Aqueous Sucrose Solution
Appl. Clay Sci.,109-110:64-67 2015
Author:Seki, Y., Ide, Y., Okada, T., Ogawa, M.

Magnetic rattle-type core-shell particles containing iron compounds with acid-tolerance by dense silica.
Ind. Eng. Chem. Res.,53:8759-8765 2014
Author:Okada, T., Ozono, S., Okamoto, M., Takeda, Y., Minamisawa, H. M., Haeiwa, T., Sakai, T., Mishima, S.

Chemically Stable Magnetic Nanoparticles for Metal Adsorption and Solid Acid Catalysis in Aqueous Media.
J. Mater. Chem. A,2(16):5751-5758 2014
Author:Okada, T., Takeda, Y., Watanabe, N., Haeiwa, T., Sakai, T., Mishima, S.

Encapsulation of a Polyoxometalate into an Organosilica Microcapsule for Highly Active Solid Acid Catalysis
ACS Catal.,4:73-78 2014
Author:Okada, T., Miyamoto, K., Sakai, T., Mishima, S.

Designed Nanostructures of Clay for Controlled Adsorption of Organic Compounds
J. Nanosci. Nanotech.,14:2121-2134 2014
Author:Okada, T., Seki, Y., Ogawa, M.

Magnetic and electronic properties of bimagnetic materials comprising cobalt particles within hollow silica decorated with magnetite nanoparticles.
J. Appl. Phys.,114(12):124304 2013
Author:Okada, T., González-Alfaro, Y., Espinosa, A., Watanabe, N., Haeiwa, T., Sonehara, M. Mishima, S., Sato, T., Muñoz-Noval, A., Aranda, P., Garcia-Hernández, M., Ruiz-Hitzky, E.

Layered Clay Aerogels by A Freeze-Drying Process for A Platinum-Supported Catalyst.
Ind. Eng. Chem. Res.,52:12018-12024 2013
Author:Okada, T., Kato, T., Yamaguchi, T., Sakai, T., Mishima, S.

Titania/CnTAB Nanoskeleton as adsorbent and photocatalyst for removal of alkylphenols dissolved in water
J. Hazard. Mater.,248-249:487-495 2013
Author:Sakai, T., Da Loves, A., Okada, T., Mishima S.

Block copolymer-mediated synthesis of gold nanoparticles in aqueous solutions: Segment effect on gold ion reduction, stabilization and particle morphology
J. Colloid Interface Sci.,394:124-131 2013
Author:Sakai, T., Horiuchi, Y., Alexandridis, P., Okada, T., Mishima S.

Swellable Microsphere of a Layered Silicate Produced by Using Monodispersed Silica Particles
J. Phys. Chem. C,116:21864-21869 2012
Author:Okada, T., Yoshido, S., Miura, H., Yamakami, T., Sakai, T., Mishima, S.

Organic-inorganic hybrids based on ultrathin oxide layers -Designed nanostructures for molecular recognition.
Chem. Asian J.,,7:1980-1992 2012
Author:Okada, T., Ide, Y., Ogawa, M.

Characteristics and mechanism of low temperature dehydrochlorination of poly(vinyl chloride) in the presence of zinc(II) oxide
Polym. Degrad. Stab.,97:584-591 2012
Author:Kosuda, T., Okada, T., Nozaka, S., Matsuzawa, Y., Shimizu, T., Hamanaka, S., Mishima, S.

Multi-shaped gold nanoparticles synthesized using an amino-terminated poly(ethylene oxide)–poly(propylene oxide) block copolymer in aqueous solutions
Chem. Lett.,40:501-502 2011
Author:Sakai, T. Ishigaki, M., Okada, T., Mishima, S.

Vesicle formation in mixture of a PEO-PPO-PEO block copolymer (Pluronic P123) and a nonionic surfactant (Span 65) in water.
Colloid Surf. A,389:82-89 2011
Author:Sakai, T. Kurosawa, H., Okada, T., Mishima, S.

Organo-smectite adsorbents; Designed nanostructures for smart adsorbents
Clay Sci.,15:103-110 2011
Author:Okada, T., Ogawa, M.

Fabrication of acid-tolerant magnetic Co@SiO2 core-shell particles with dense silica shell
Chem. Lett.,40:106-107 2011
Author:Okada, T., Watanabe, N., Sakai, T., Haeiwa, T., Mishima, S.

Adsorption of 4-nonylphenol on 1,1’-dioctyl-4,4’-bipyridinium-smectite intercalation compounds from aqueous solution
Clay Sci.,14:191-196 2010
Author:Okada, T., Ogawa, M.

A facile route of gold nanoparticle synthesis and surface modification using amino-terminated poly(ethylene oxide)-poly(propylene oxide) block copolymers
J. Nanosci. Nanotech.,10:919-926 2010
Author:Sakai, T. Ishigaki, M., Okada, T., Mishima, S.

Nanospace engineering inthe interlayer space of hectorite-like layered silicates with varied layer charge density for the adsorbents design
J. Phys. Chem. C,114:539-545 2010
Author:Okada, T. Matsutomo, T., Ogawa, M.

Preparation of quaternary diammonium-montmorillonites and their vapor adsorption properties
Microporous Mesoporous Mater.,129:30-35 2009
Author:Seki, Y., Okada, T., Ogawa, M.

Preparation of iron containing hectorite-like swelling silicate
Bull. Chem. Soc. Jpn.,82:408-412 2009
Author:Ogawa, M., Matsutomo T., Okada, T.

One-pot Synthesis of Inorganic-Organic Hollow Microsphere Solid-Acid Catalysts in a W/O Microemulsion System
Chem. Lett.,39:32-33 2009
Author:Okada, T., Mishima, S., Yoshihara, S.

Adsorption of tetrakis(p-sulfonatophenyl)porphyrin on kaolinite.
J. Porous Mater.,16(6):623-629 2009
Author:Tanaka, Y., Okada, T., Ogawa, M.

Luminescence quenching of tris(2,2’-bipyridine)ruthenium(II) in the interlayer space of saponite by sulfur dioxide
Clay Sci.,14:43-48 2008
Author:Okada, T., Konno, T., Ogawa, M.

Preparation of hectorite-like swelling silicate with controlled layer charge density.
J. Ceram .Soc. Jpn.,116:1309-1313 2008
Author:Ogawa, M., Matsutomo T., Okada, T.

The effect of the molecular structure of a cationic azo dye on the photoinduced intercalation of phenol in a montmorillonite
Appl. Clay Sci.,40:187-192 2008
Author:Okada, T., Sakai, H., Ogawa M.

Adsorption of europium ion on smectites and fluor-tetrasilicic mica
Clays Clay Miner.,55:348-353 2007
Author:Okada, T., Ehara, Y., Ogawa M.

Adsorption andpossible luminescence detection of 4-nonylphenol by Eu3+-smectites
Chem. Lett.,35:638-639 2006
Author:Okada, T., Ehara, Y., Ogawa M.

Preparation and properties of trans-2-butene-1,4-bis(triphenylphosphonium)-saponite
J. Porous Mater.,13:157-161 2006
Author:Tanaka, Y., Okada, T., Ogawa, M.

Adsorption of phenols onto transition-metal complex-clay intercalation compounds from aqueous solutions.
Author:Okada, T; Morita, T; Ogawa, M;

Photoregulation of adsorption behavior of phenol for azobenzene-clay intercalation compounds
J. Mater. Chem.,15:987-992 2005
Author:Okada, T., Watanabe, Y., Ogawa, M.

Tris(2,2’-bipyridine)ruthenium(II)-clays as adsorbents for phenol and chlorinated phenols from aqueous solution
Appl. Clay Sci.,29:45-53 2005
Author:Okada, T., Morita, T., Ogawa, M

Adsorption behavior of phenol for mono, bis and tris(2,2’-bipyridine)nickel(II)- and tris(ethylenediamine)nickel(II)-saponite intercalation compounds from aqueous solution
Clay Sci.,12:277-284 2004
Author:Okada, T., Morita, T., Ogawa, M.

Photocontrol of the adsorption behavior of phenol for azobenzene-montmorillonite intercalation compound
Chem. Commun.,:320-321 2004
Author:Okada, T, Watanabe, Y., Ogawa, M.

p-Phenylenediammonium-smectites as adsorbents with colorimetric detection ability for phenols in water
Bull. Chem. Soc. Jpn.,77:1165-1170 2004
Author:Okada, T., Ogawa, M.

1,1’-Dimethyl-4,4-bipyridinium-smectites as a novel adsorbent of phenols from water through charge-transfer interactions
Chem. Commun.,:1378-1379 2003
Author:Okada, T., Ogawa, M.

Adsorption of phenols onto 1,1’-dimethyl-4,4’-bipyridinium-smectites.
Chem. Lett.,31:812-813 2002
Author:Okada, T., Ogawa, M.

Research Activities
Other Research Activities
2012-2013 , International Symposium on Materials Chemistry of Intercalation Compounds (MCIC2013) , 組織委員
2012-2019 , 日本化学会研究会「低次元光機能材料研究会」 , 役員
2005-2005 , International Symposium on Physics and Chemistry of Smectites , 組織委員