Papers - OHE Kaoru
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Mechanism of gold adsorption by persimmon tannin gel
Nakajima A., Ohe K., Baba Y., Kijima T.
Analytical Sciences 19 ( 7 ) 1075 - 1077 2003.7
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Analytical Sciences
Gold adsorption by persimmon tannin (PT) gel from a solution containing hydrogen tetrachloroaurate(III) was examined. A flow-rate examination in a column system indicated the reduction of Au(III) ion to Au(0). XRD patterns clarified the existence of Au(0) on the gel which adsorbed gold. The gel could also adsorb colloidal Au(0) prepared independently. A model consisting of ligand exchange, Au(III) reduction to Au(0), and resulting Au(0) adsorption by PT gel was presented for the gold adsorption mechanism.
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Removal of nitrate anion by carbonaceous materials prepared from bamboo and coconut shell
Ohe K., Nagae Y., Nakamura S., Baba Y.
Journal of Chemical Engineering of Japan 36 ( 4 ) 511 - 515 2003.4
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of Chemical Engineering of Japan
The adsorption behavior of nitrate anion was investigated from aqueous solution using activated carbon (AC) prepared from coconut shells and charcoal (CB) prepared from bamboo. The adsorption of nitrate anions on these adsorbents exhibited maximum values in the region of equilibrium pH 2-4, and was explained by the adsorption of the Langmuir type. The adsorption capacity and the adsorption equilibrium constant for AC were 2.66 × 10 -1 mmol·g -1 , and 2.72 dm 3 ·mmol -1 , respectively, and those for CB were 1.04 × 10 -1 mmol·g -1 and 3.53 dm 3 ·mmol -1 , respectively, at 303 K. The order of the adsorption capacity was the same as the order of their specific surface areas. This suggests that the specific surface area is one of the factors that determine the adsorption ability for nitrate anions. The theoretical curves calculated using these values were in good agreement with the experimental data. From the obtained thermo-dynamic parameters, it was found that the adsorption of nitrate anions on AC and CB contributes to the hydrophobic interaction.
DOI： 10.1252/jcej.36.511
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OHE Kaoru, OKAMOTO Kenzo, NAKAMURA Shigeo, BABA Yoshinari
日本イオン交換学会誌 14 ( 0 ) 325 - 328 2003
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Ion Exchange
New adsorbents (AP, AMP, AHMP and MG) were prepared by introducing the aminoalcohol groups such as 3-amino-1, 2-propanediol, 2-amino-2-methyl-1, 3-propanediol, 2-amino-2-hydroxymethyl-1, 3-propandiol and N-methyl-D (-) -glucamine, respectively, to glycidyl methacrylate-divinylbenzene microspheres (GD) in order to investigate the adsorption properties of boron. All experiments were carried out using a batch method. The amount of OH group introduced to microspheres is the following order: MG>AMP>AHMP>AP. The adsorption of boron showed maximums at pH 6-8 for all adsorbents. The adsorption capacity and the adsorption equilibrium constant were determined using the Langmuir equation. Their adsorption capacities for boron are the following order: AHMP>MG>AP>AMP. Although the amount of OH group introduced to AP is less than AMP, the adsorption capacity of AP is higher than AMP. This result suggests that boron prefers the five-membered chelating ring to the six-membered chelating ring. Boron adsorbed on AMP was easily desorbed using 1 mol·dm<SUP>-3</SUP> hydrochloric acid.
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Molecularly Imprinted Mesoporous Silicas for the Separation of Metal Ions by Sol-Gel Method
BABA Yoshinari, OHE Kaoru, NAKAMURA Shigeo
日本イオン交換学会誌 14 ( 0 ) 161 - 164 2003
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Japan Society of Ion Exchange
The mesoporous silicas doubly imprinted with both surfactant micelles and metal ions acting as templates were prepared to develop highly selective adsorbents by cocondensation of tetraethoxysilane (TEOS) and copper-3- (2-aminoethylamino) propyltrimethoxysilane (Cu (appts) <SUB>2</SUB><SUP>2+</SUP>) in the presence of structure-directing cationic cetyltrimethylammonium bromide (CTAB) surfactant micelles. Removal of the metal ion and the surfactant results in the formation of different-sized imprints within adsorbents: the pores that give the gel enhanced selectivity for the target metal ion and the cylindrical pores that give the gel an overall porosity which includes large surface areas and excellent metal ion transport kinetics. The measurement of adsorption equilibri-um and kinetics of copper ion on these adsorbents provided the high adsorption capacity and selectivity, coupled with fast kinetics, for copper ions used as templates.
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Yada M., Kuroki S., Kuroki M., Ohe K., Kijima T.
Langmuir 18 ( 22 ) 8714 - 8718 2002.10
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Langmuir
The coexistence of SO 4 2- , F - , and H 2 PO 2 - anions in the synthesis of mesostructured alumina and gallium oxides is effective for preparing porous solids with a mesostructure comprised of different inorganic frameworks depending on the degree of interaction between Al 3+ or Ga 3+ and such anions. The approach may thus be applicable to the conversion of any other mesostructured metal oxides labilized by template removal into stable mesoporous solids.
DOI： 10.1021/la020113r
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OHE Kaoru, NAKAYAMA Rie, NAKAMURA Shigeo, BABA Yoshinari
8 ( 2 ) 168 - 169 2002.7
Language：Japanese Publishing type：Research paper (scientific journal)
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FUJIMOTO Kanji, OHE Kaoru, NAKAMURA Shigeo, BABA Yoshinari, SHIMIZU Masataka, NAKASHIMA Tadao
8 ( 2 ) 170 - 171 2002.7
Language：Japanese Publishing type：Research paper (scientific journal)
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Porous yttrium aluminum oxide templated by alkyl sulfate assemblies
Yada M., Ohya M., Ohe K., Machida M., Kijima T.
Langmuir 16 ( 4 ) 1535 - 1541 2000.2
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Langmuir
Mesostructured hexagonal yttrium aluminum oxides templated by alkyl sulfate assemblies were synthesized by the homogeneous precipitation method using urea. The unit cell parameter a of the hexagonal mesophases is controllable by the alkyl chain length of the incorporated surfactant molecules as in the aluminum-based end member system, although the cell dimension of the yttrium-based system is little dependent on the alkyl chain length. The hexagonal yttrium aluminum based dodecyl sulfate mesophases with Al/(Al+Y) molar ratios of 0.54 or above were obtained as a single phase, whereas those with lower Al/(Al+Y) ratios coexisted with the yttrium-based mesophase. The Y-Al based hexagonal mesophases with 0.54 ≤ Al/(Al+Y) ≤ 0.74 were converted into an ordered porous material with a specific surface area of 662-797 m 2 g -1 by the anion exchange of alkyl sulfate surfactants with acetate ions, in contrast to the collapse of the hexagonal mesophases with Al/(Al+Y) > 0.74 by the same treatment. The much higher stability of the former hexagonal phase upon acetate treatment was attributed to the increased ratio of 6-coordinate to 4-coordinate Al polyhedra.
DOI： 10.1021/la990493p
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Durable solid products prepared by calcining Fe<inf>3</inf>O<inf>4</inf>-rich ash and glass waste
Ohe K., Kuroki S., Kijima T., Machida M.
Journal of the Ceramic Society of Japan 108 ( 7 ) 687 - 689 2000
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Ceramic Society of Japan
Solidified ash products were obtained by mixing and heating of powdered bottom Fe 3 O 4 -rich ash and glass waste paste in an inclined rotary incinerator. The chemical composition and structure of the product were analyzed by X-ray diffraction (XRD), scanning electron microscope/energy dispersive X-ray spectrometer (SEM/EDX), Fourier transformation infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The bulk sample mainly consisted of Fe 3 O 4 and NaAlSiO 4 , and glassy grain boundaries, which strongly bonded the ash to form a solid product. On the other hand, the surface of the product was covered by a Fe-free glassy layer of ∼10 μm in thickness. The glassy surface layer was effective in preventing the dissolution of heavy metals (Pb, Cr) into aqueous acid solutions (2 < pH < 7).
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Lithium-iodine intercalation in the ferroelectric layered compound butijoi
Kijima T., Kimura S., Kawahara Y., Ohe K., Yada M., Machida M.
Materials Research Society Symposium - Proceedings 547 151 - 155 1999.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Materials Research Society Symposium - Proceedings
The reaction of Bi-4ijO-4-x with lithium iodide under an atmosphere of iodine at 4000 was found to afford a novel intercalation compound Li-4BMTijOii. The brownish red bismuth titanate is monoclinic with the lattice parameters of a=5.7417(2), b=5.4016(2), c=36.787(1)A and 0=88.93(1) deg. The pathway to the new intercalation compound is proposed on the basis of X-ray, XPS, SEM and compositional observations. «1999 Materials Research Society.
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Intercalation of Dendritic Polyamines by α- and γ-Zirconium Phosphates
Kijima Tsuyoshi, Ohe Kaoru, Sasaki Fumie, YADA Mitsunori, MACHIDA Masato
Bulletin of the Chemical Society of Japan 71 ( 1 ) 141 - 148 1998.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Chemical Society of Japan
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Intercalation of Dendritic Polyamines by α and γ-Zirconium Phosphates
Kijima T., Ohe K., Sasaki F., Yada M., Machida M.
Bulletin of the Chemical Society of Japan 71 ( 1 ) 141 - 148 1998.1
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Bulletin of the Chemical Society of Japan
Tridentate polyamines, N(CH 2 CH 2 NH 2 ) 3 and N(RNH 2 ) 3 (R = CH 2 CH 2 CONHCH 2 CH 2 ), react with both α- and γ-zirconium phosphates to give an intercalated phase in which the amine molecules are fully loaded as an interdigitating monolayer with their flatted molecular planes highly titles relative to the inorganic layers. On the other hand, although hexadentate polyamine. N(RN(RNH 2 ) 2 ) 3 , forms a more expanded intercalate from its dilute solution, the longer chain amine can not be intercalated from its concentrated solution, due to the entanglement of dissolved molecules.
DOI： 10.1246/bcsj.71.141
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Yada M., Hiyoshi H., Ohe K., Machida M., Kijima T.
Inorganic Chemistry 36 ( 24 ) 5565 - 5569 1997.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Inorganic Chemistry
The morphologically controlled synthesis of aluminum-based surfactant mesophases by the homogeneous precipitation method using urea is demonstrated, together with a model for the templating mechanism pathway. Dodecyl sulfate surfactant initially forms a layered mesophase with an interlayer spacing of 3.5 nm in which the surfactant molecules are arranged as a bilayer between the linked sheets of aluminum oxyhydroxide groups. The aluminate sheets consist mostly of octahedral Al but contain some fraction of tetrahedral Al dependent on urea concentration. On further hydrolysis of urea, the layered mesophase is transformed into a hexagonal form through the interlayer condensation and cross-linking of the Al-OH groups in any adjacent aluminate sheets. The structural transition accompanies the rearrangement of the bilayered surfactant molecules into a rodlike assembly, followed by the additional growth into enlarged particles. The hexagonal mesophase resulting from the lamellae containing comparatively large amounts of tetrahedral Al forms a ringed or curved wormlike morphology, while the phase grown from octahedral Al-enriched forms appears in versatile patterns including spherical, funneled, and tubular particles. Such morphologically versatile characteristics of the hexagonal mesophases reflect those of their precursors produced by the folding of aluminum-based flexible sheets of aluminum oxyhydroxide octahedral groups mixed with their tetrahedral ones at a fraction dependent on urea concentration.
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Kijima T., Watanabe S., Ohe K., Machida M.
Journal of the Chemical Society, Chemical Communications ( 1 ) 75 - 76 1995.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Chemical Society, Chemical Communications
The reaction of n-alkylamines C n H 2n+1 NH 2 (n=1-10) with a partially phosphated zirconium carboxyethyl-phosphonate shows that only heptylamine (n=7) is preferentially intercalated to form a bilayer, demonstrating a new class of host-guest process based on molecular assembly recognition.
DOI： 10.1039/C39950000075
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Kijima Tsuyoshi, Kato Yoshikuni, Ohe Kaoru, Machida Masato, Matsushita Yohichi, Matsui Takanao
Bulletin of the Chemical Society of Japan 67 ( 8 ) 2125 - 2129 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan
The uptake of two different types of cationic calix[4]areneoctols by Cu(II)–montmorillonite was studied at 25 °C. <i>p</i>-Aminobezylated calix[4]areneoctol <b>1</b> forms an intercalated phase in which the guest molecules are arranged as a 10.8 Å thick monolayer, with a cone-type conformation and with their cavity axes perpendicular to the inorganic layers. Thermogravimetric and copper(II) release data suggest that the calixareneoctol molecules are taken up in their divalent form and act as a prop to yield a vacant space of 42% in interlayer porosity. The molecules of dimethylammoniomethylated calix[4]areneoctol <b>2</b> are also intercalated as a monolayer, but initially in their divalent form and finally in the di- and mono-valent mixed form to fully occupy the interlayer space. The striking contrast between the two calixareneoctols as guest species is substantially due to the difference in bulkiness of their ammonio-substituted groups.
DOI： 10.1246/bcsj.67.2125
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Intercalation of (Pt(en)2)2+ and (PtCl2(en)2)2+ Ions by Na-Montmorillonite.
Kijima Tsuyoshi, Sakaguchi Kenji, Ohe Kaoru
Bulletin of the Chemical Society of Japan 67 ( 5 ) 1281 - 1285 1994
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan
The individual and mixed uptakes of [Pt(en)<sub>2</sub>]<sup>2+</sup> and [PtCl<sub>2</sub>(en)<sub>2</sub>]<sup>2+</sup> ions by Na-montmorillonite have been studied at 25 °C. In the individual uptakes, the Pt(IV) complex ions are intercalated beyond the cation exchange capacity of the host, which is in striking contrast to the Pt(II) complex ions which are taken up through the capacity. Both complex ions are arranged as a monolayer in which their square-planar Pt<sup>II</sup>(en)<sub>2</sub> and Pt<sup>IV</sup>(en)<sub>2</sub> planes are parallel and perpendicular to the silicate layers, respectively. The uptake reaction with an equimolar solution of both complexes results in the predominant intercalation of the Pt(II) complex ions, while that with a Pt(IV)-riched mixed solution yields a co-intercalated monolayer in which the Pt(IV) complex ions are held with their square-planar planes tilted by ca. 52° with respect to the silicate layer.
DOI： 10.1246/bcsj.67.1281
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Intercalation of 2-aminoethylamino-substituted β-cyclodextrin by γ-zirconium phosphate
Kijima T., Ohe K.
Journal of the Chemical Society, Dalton Transactions ( 19 ) 2877 - 2879 1992.12
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：Journal of the Chemical Society, Dalton Transactions
The uptake of [6-(2-aminoethylamino)-6-deoxy]-β-cyclodextrin (cden) by γ-zirconium phosphate Zr(HPO 4 ) 2 ·2H 2 O has been studied at 25°C. The intercalation behaviour of cden for the γ phosphate is in marked contrast to that observed previously with α-zirconium phosphate Zr(HPO 4 ) 2 ·H 2 O. The γ phosphate forms initially an intercalated phase in which the cden molecules are arranged as a bilayer of thickness 31.3 Å with cavity axes parallel to the phosphate layers. With further increase in the amount of cden added, the thickness of the intercalant layer rapidly decreases to 24.7 Å, with an accompanying appreciable decrease in the cden content.
DOI： 10.1039/DT9920002877
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Intercalation of a Trimethylammoniomethylated Calix(4)arene by Cu(II)-Montmorillonite.
Kijima Tsuyoshi, Ohe Kaoru, Shinkai Seiji, Nagasaki Takeshi
Bulletin of the Chemical Society of Japan 65 ( 9 ) 2510 - 2513 1992
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：The Chemical Society of Japan
The uptake of 5,11,17,23-tetrakis(trimethylammoniomethyl)-25,26,27,28-tetramethoxycalix[4]arene tetrachloride by Cu(II)-montmorillonite was examined at 25 °C. The mineral forms an intercalated phase in which the calixarene molecules are arranged as a 9.5 Å thick monolayer, with a cone-type conformation, with their cavity axes perpendicular to the silicate layers. Thermogravimetric and copper(II) release data suggest that the guest molecules are taken up in their tetra- and tri-valent forms during the initial and final uptake stages, respectively.
DOI： 10.1246/bcsj.65.2510
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22 オオムギ幼植物の各種要素欠乏とグルコサミン(九州支部講演会要旨(その2))
高木 浩, 大脇 淳一, 丸山 真理子, 大栄 薫, 村田 麻美, 長友 秀昌
日本土壌肥料学会講演要旨集 ( 34 ) 1988.3
Language：Japanese Publishing type：Research paper (scientific journal) Publisher：一般社団法人日本土壌肥料学会