研究者業績

島津 省吾

シマヅ ショウゴ  (Shogo Shimazu)

基本情報

所属
千葉大学 大学院工学研究院 教授
学位
PhD(Chemistry)(Texas A&M University)
(BLANK)(Osaka University)

J-GLOBAL ID
200901000282099479
researchmap会員ID
1000010477

外部リンク

研究キーワード

 2

論文

 100
  • Yamanaka Nobutaka, Hara Takayoshi, Ichikuni Nobuyuki, Shimazu Shogo
    CHEMISTRY LETTERS 47(8) 971-974 2018年8月  査読有り
  • Leo Saputra, Takashi Kojima, Takayoshi Hara, Nobuyuki Ichikuni, Shogo Shimazu
    Molecular Catalysis 453 132-138 2018年7月1日  査読有り
    We successfully prepared Pd-containing perovskite strontium titanate (Pd-STO) by a relatively low-temperature hydrothermal method (i.e., 373 K) without posterior calcination. The particle size and porosity of the STO perovskite could be tuned by changing the molar ratio of H2O/NH3 (e.g., 5.0, 12.5 and 25.0) during the preparation of the amorphous titania sources. The mesoporous contained Pd-STO(12.5) showed superior catalytic performance compared to that of the other Pd-STO(x) (x = H2O/NH3) perovskites for alcohol oxidation with molecular oxygen. Both the refluxing of the non-polar solvents and addition of molecular sieves enhanced the reaction yield significantly. The Pd-incorporated perovskite (Pd-STO) showed better recyclability compared with that of the impregnated perovskite (imp-Pd/STO).
  • Takuro Sasaki, Nobuyuki Ichikuni, Takayoshi Hara, Shogo Shimazu
    Catalysis Today 307 29-34 2018年6月1日  査読有り
    Supported NiO catalysts were prepared by different precursor, support and temperature of the calcination in air. XAFS measurements revealed that Ni-O-Si complex structure formed with NiO nanocluster on catalysts prepared by using [Ni(NH3)6]2+ and SiO2 as a precursor and support, respectively. Coexistence of Ni-O-Si complex structure with NiO nanocluster resulted in the higher activity for 1-phenylethanol oxidation compared to NiO nanocluster only, which indicated that Ni-O-Si complex structure had the promoting effect for this reaction.
  • Rodiansono, Maria Dewi Astuti, Dwi Rasy Mujiyanti, Uripto Trisno Santoso, Shogo Shimazu
    Molecular Catalysis 445 52-60 2018年2月1日  査読有り
    A novel preparation method for bimetallic nickel-indium alloy catalysts supported on amorphous alumina (Ni-In(x)/AA x = Ni/In molar ratio) catalysts has been developed and evaluated for the highly selective hydrogenation of biomass-derived furfural. Ni-In(x)/AA catalysts were obtained via the hydrothermal treatment of Raney® nickel supported on aluminium hydroxide (R-Ni/AlOH) and an InCl2·H2O solution in an ethanol/H2O mixture at 423 K for 2 h, followed by reduction with H2 at 573–873 K for 1.5 h. The formation of Ni-In alloy phases such as Ni3In2, Ni3In, Ni2In, and NiIn in Ni-In(2.0)/AA was clearly observed after reduction with H2 at 873 K for 1.5 h. Ni-In(2.0)/AA contained a Ni2In alloy as the major phase, which exhibited the best catalytic performance for the selective hydrogenation of furfural into furfuryl alcohol and was stable for at least five consecutive reaction runs.
  • Husni Wahyu Wijaya, Takayoshi Hara, Nobuyuki Ichikuni, Shogo Shimazu
    Chemistry Letters 47(1) 103-106 2018年  査読有り
    A Ni-Y2O3 catalyst containing ruthenium (Ru/Ni-Y2O3) was synthesized and applied to the hydrogenolysis of tetrahydrofurfuryl alcohol (THFA) to produce 1,5-pentanediol (1,5-PeD), which showed superior catalytic performance over that of the Ni-Y2O3 catalyst itself. The optimized ruthenium-containing catalyst, which was prepared by impregnation of 1.0 wt% ruthenium in Ni-Y2O3, showed high catalytic activity for producing 1,5-PeD, giving an 86.5% yield at 93.4% conversion of THFA under 2.0 MPa of H2 at 423K after 40 h. The formation of Ru-Ni0-Y2O3 boundaries was proposed to accelerate the C-O bond scission of the tetrahydrofuran ring to give 1,5-PeD.

MISC

 60
  • AJ O'Connor, A Hokura, JM Kisler, S Shimazu, GW Stevens, Y Komatsu
    SEPARATION AND PURIFICATION TECHNOLOGY 48(2) 197-201 2006年3月  
    Mesoporous molecular sieves are promising as adsorbents for purification of biological molecules, such as arm no acids, due to their tuneable mesopore sizes and high surface area. In this study, the adsorption of the basic amino acid, lysine, onto MCM-41, a siliceous mesoporous molecular sieve, has been investigated Under a range of solution conditions. It was found to adsorb according to a Langmuir-type isotherm with a maximum capacity at pH 6 of 0.21 mmol/g. The extent of adsorption depends strongly on the pH and ionic strength of the adsorbate solution, due to a combination of ion exchange and electrostatic interactions governing the adsorption process. (c) 2005 Elsevier B.V. All rights reserved.
  • Y Permana, S Shimazu, N Ichikuni, T Uematsu
    CATALYSIS COMMUNICATIONS 6(6) 426-430 2005年6月  
    Two series of zirconium beta-diketonates: tris(benzoylacetonato)zirconium (IV) perchlorate (3b) and tris(dibenzoylmethanato)zirconium (IV) perchlorate (3c) were synthesized. The complexes were synthesized by a reaction of zirconium tetrachloride with corresponding ligands in a 1:3 molar ratio, followed by a reaction with silver perchlorate. Characterization was by elemental analyses, UV-Vis, FTIR and H-1 NMR spectroscopies. The complexes were prospective to serve as Lewis acid catalysts for ring opening reactions of oxiranes with alcohols for synthesizing primary alkoxyalcohols. Previously reported tris(acetylacetonato)zirconium (IV) chloride (2a) was used as comparison. The effect of phenyl ring on ligand frame towards enhancement of Lewis acidity of zirconium is focused. Other factors, such as nucleophile strength of alcohols and alkyl substituent of oxiranes are also discussed. (c) 2005 Elsevier B.V. All rights reserved.
  • Shin-Ichi Nagamatsu, Nobuyuki Ichikuni, Shogo Shimazu, Takashi Fujikawa, Kenzo Fukuda, Takayoshi Uematsu
    Physica Scripta T T115 756-758 2005年  
    Alumina supported gold catalyst prepared by spray reaction method (spr) provides gold particles with about 20nm diameter. The gold particle size is larger than for conventional gold catalysts. However, the spr catalyst shows catalytic activity for NO-CO reaction. In the present paper, we discuss the local structures of spr-Au/Al2O3 catalyst by using Au L3-edge XANES spectra. In order to investigate the local structures of Au-sites, multiple scattering approach to XANES analysis was applied. Calculated Au L3-edge XANES spectrum for fcc-Au and Au 2O3 were in good agreement with the observed spectra. XANES spectra for spr-Au/Al2O3 were characterized by 4 types of Au sites (bulk, interface, surface and peripheral). In this case, almost all gold sites (&gt 90%) are bulk sites. Less than 10% of the gold particles are in interface sites. However, the experimental result for spr-Au/Al2O3 requires about 30% of gold oxide or hydroxide. Bulk of Al2O3 contains a certain number of gold nano-particles, which was incorporated in the Al2O3 support. In the interface area, gold oxide forms a few layers. This result was also supported by DV-Xα electronic structure calculations. © Physica Scripta 2005.
  • N. Ichikuni, H. Hachiya, K. K. Bando, S. Shimazu, T. Uematsu
    Physica Scripta T T115 807-809 2005年  
    Mesoporous silica supported Nb catalyst (imp Nb/SBA-3) was prepared by impregnation of NbCl5 to the SBA-3 support. The mesoporous silicate-wall incorporated Nb catalyst (inc Nb-SBA-3) was synthesized by introducing NbCl5 into an SBA-3 precursor solution. Both catalysts were carburized by a temperature programmed reaction (TPR) method under CH 4/H2 gas stream. Nb K-edge in-situ XAFS analysis revealed that Nb2O5 was reduced to NbO2 in the first stage of TPR and converted into NbC in the second stage. The silica-wall incorporated Nb species were highly dispersed and hardly reduced nor fully carburized. The difference in the carburization process between imp Nb/SBA-3 and inc Nb-SBA-3 was clarified. © Physica Scripta 2005.
  • H. Murayama, N. Ichikuni, K. K. Bando, S. Shimazu, T. Uematsu
    Physica Scripta T T115 825-827 2005年  
    Silica supported molybdenum oxide catalysts were prepared from Mo dimer complex (Mo2(CH3CO2)4) by using photochemical anchoring (PCA) method. The local environments of Mo atoms on both attached and oxidized catalysts were investigated by Mo K-edge EXAFS, XANES, Raman spectroscopy and thermal gravimetric analysis. The bond distance between dimeric Mo atoms could be changed depending on the energy of UV irradiation. By using the lower irradiation energy (λ &gt 350 nm), the attached structure was close to the original Mo dimer complex. After oxidation of the catalyst, dimeric structure was formed with bridging oxygen and the Mo-(O)-Mo bond distance was 0.316 nm. On the other hand, in the case of higher irradiation energy (λ &gt 250 nm), the Raman spectrum of the attached catalyst had bands due to acetate ligands except a band at 405 cm-1 due to Mo-Mo skeleton bond. It means that Mo2(CH3CO2) 4 is decomposed by UV irradiation. The oxidized form of the higher energy irradiated catalyst showed monomer-pair structure. © Physica Scripta 2005.

書籍等出版物

 11

講演・口頭発表等

 9

Works(作品等)

 29