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1996 Fiscal Year Final Research Report Summary

Molecular Assemblies Confined in a Controlled Angstrom-Range Solid Space

Research Project

Project/Area Number 06403013
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 機能・物性・材料
Research InstitutionChiba University

Principal Investigator

KANEKO Katsumi  Chiba University Faculty of Science Professor, 理学部, 教授 (20009608)

Co-Investigator(Kenkyū-buntansha) SUZUKI Takaomi  Chiba University Faculty of Science Assistant, 理学部, 助手 (20196835)
Project Period (FY) 1994 – 1996
KeywordsNanospace / Molecular adsorption / H_2O / CCl_4 / Intermolecular interaction / Radial distribution / Molecular simulation / Activated carbon
Research Abstract

We dispersed four kinds of graphitic angstrom-range spaces : the graphitic slit micropores of heat-treated activated carbon fibers (ACFs), graphitic films of oriented slit-micropores, point defect-induced pore spaces in C60 crystals, and micropore-donated carbon aerogels. Their atomic and pore structures were determined by X-ray diffraction and molecular probe method, respectively. The nano-oriented structure of the pore oriented graphitic film was characterized by atomic force microscopy (AFM). AFM showed that slit-pores have a considerably good mutual orientation. The fine micropore structures were determined by N_2 adsorption at 77 K and He adsorption at 4.2 K In particular, He adsorption was effective for elucidation of ultramicropore structures. The structure of H_2O and CCl_4 confined in a slit-micropore of ACFs having different widths from 0.7 nm to 1.3 nm were determined by in situ X-ray diffraction at the temperature range of -150 to 30゚C.The electron radial distribution function of H_2O confined in the micropore at 30゚C was completely different from that of bulk liquid water 30゚C.The structure of H_2O molecules in micropores did not change even at -150゚C.On the other hand, CCl_4 molecules confined in micropores of pore widths except for 1.0 nm had a liquid like structure, but ones in 1.0 nm-width pores had a plastic cystalline structure. The Grand Canonical Monte Calro simulation anticipated this structural anomaly for CCl_4 molecules in micropores of the 1.0 nm width. The activated carbon aerogels had bimodal distribution of uniform mesopores and micropores, of which pore widths can be controlled by the preparation conditions. The pore geometry could be approximated by a cylinder form. The molecular defets in C_<60> crystals could be controlled by the recrystallization and it was shown that a plenty of molecular defects form the connected micropores.

  • Research Products

    (18 results)

All Other

All Publications (18 results)

  • [Publications] M,Sato,K,Kaneko et al: "Suface fracfal dinensior of less-cryzfalline carbon nanespace-walls" J. Phys. Chem.(1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Iiyama,K.Kaneko et al: "Apore-width sensitive ordered structwe of water molewles in a cavbor,micvopove" Characfevization of Porous Soficls IV. (1997)

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      「研究成果報告書概要(和文)」より
  • [Publications] T,Suzuki,K.Kaneko et al: "Pone widsh-sensitive filling mechanism of CCl_4 molecoles in a graphitic micropore by Conpvter simvlation" Langmuiv. (1997)

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      「研究成果報告書概要(和文)」より
  • [Publications] T,Suzuki,K.Kaneko et al: "Grand canonical Monte Calro Simulation for nitrogen adsovption in graphitic slit micropores" Cavbon. 34. 909-912 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] R,Restootsev,K.Kaneko et al: "Recnptallizafion-induced defect porous natwe of C_<60> cnjstals" Adsovption. 2. 153-156 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] N,Setoyama,K,Kaneko et al: "Ultramicropone Characfevizafion of micvoporous Carbons at low temperafure veliom adsorptior" J. Phys : Chem.100. 10331-10336 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] 金子克美: "コロイド科学I、基礎および分散・吸着" 東京化学同人, 46 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] 金子克美: "コロイド科学IV コロイド科学実験法" 東京化学同人, 30 (1996)

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      「研究成果報告書概要(和文)」より
  • [Publications] M.Sato, T.Sukegawa, T.Suzuki, K.Kaneko: "Surace fractal dimension of less-crystalline carbon nanospace-walls" J.Phys.Chem. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y.Hanzawa and K.Kaneko: "Activated carbon aerogels" Langmuir. 25. 6167-6169 (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] K.Kaneko and K.Murata: "An analytical method of micropore filling of a supercritical gas" Adsorption. 3. 197-208 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Taku Iiyama, Takaomi Suzuki, Katsumi Kaneko: "An imperfect packing of CCl_4 molecules confined in a graphitic slit nanospace" Chem.Phys.Lett.259. 37-40 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.suzuki, K.Kaneko, N.Setoyama, M.Maddox, and K.E.Gubbins: "Garand canonical Monte Calro simulation for nitrogen adsorption in graphitic slit micropores : Effect of interlayr distance" Carbon. 34. 909-912 (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] R.Rostovtsev, C.Ishii, N.Setoyama, N.Uekawa, and K.Kaneko: "Recrystallization-induced defect porous nature of C_<60> crystals" Adsorption. 2. 153-156 (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] P.Branton, K.Kaneko, N.Setoyama, K.S.W.Sing, S.Inagaki, and Y.Fukushima: "Physisorption of nitrogen by mesoporous modified kanemite" Langmuir. 12. 599-600 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Setoyama, K.Kaneko, and F.Rodriguez-Reinoso: "Ultramicropore characterization of microporous carbons at low temperature helium adsorption" J.Phys.Chem.100. 10331-10336 (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] T.Iiyama, K.Nishikawa, T.Otowa, K.Kaneko: "Organized moleculara states in carbon micropores" Fundamentals of Adsorption. 401-408 (1996)

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      「研究成果報告書概要(欧文)」より
  • [Publications] H.Kanoh and K.Kaneko: "Magnetic Spin Sates of O_2 confined in a graphitic slit-nanospace at low temperature" J.Phys.Chem.100. 755-759 (1996)

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Published: 1999-03-09  

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