研究者詳細 - 小林　亮

論文 - 小林　亮

分割表示 134 件中 101 - 120 件目／全件表示 >>

Enhancement of luminescence properties of a KSrPO₄:Eu²+ phosphor prepared using a solution method with a water-soluble phosphate oligomer 査読有り国際誌

Kim Minsung, Kobayashi Makoto, Kato Hideki, Kakihana Masato

JOURNAL OF MATERIALS CHEMISTRY C 1 巻 ( 36 ) 頁： 5741 - 5746 2013年

Orange emission from new (Ba_1-XSr_X)₄Al₂S₇:Eu²⁺ thioaluminate phosphors with visible light excitation 査読有り国際誌

Takahiko Hasegawa, Hideki Kato, Yuji Takatsuka, Makoto Kobayashi, Hisanori Yamane, Masato Kakihana

ECS Journal of Solid State Science & Technology 2 巻 ( 2 ) 頁： R3107 - R3111 2013年

Photocatalytic activities of Cu_3xLa_1-xTa₇O₁₇ solid solutions for H₂ evolution under visible light irradiation 査読有り国際誌

Hideki Kato, Arisa Takeda, Makoto Kobayashi, Michikazu, Hara, Masato Kakihana

Catalysis Science & Technology 3 巻 ( 12 ) 頁： 3147 - 3154 2013年

Synthesis of spindle and square bipyramid-shaped anatase-type titanium dioxide crystals by a solvothermal method using ethylenediamine 査読有り国際誌

Kobayashi Makoto, Kato Hideki, Kakihana Masato

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 120 巻 ( 1407 ) 頁： 494 - 499 2012年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

Morphological control as well as formation of nanoparticles of anatase-type titanium dioxide has been achieved by a solvothermal treatment of a water-soluble citratoperoxotitanium (CPT) complex using ethylenediamine (EDA) as a key solvent in the presence of a given amount of water. When the EDA concentration in the whole solvent (EDA + H2O) remained low less than 12 M, the powder obtained after the solvothermal treatment consisted of spindle-like anatase particles. With an increase of the EDA concentration in the solvent, the shape of the obtained particles changed from spindle to square bipyramid. When another water-soluble oxoglycolatoperoxotitanate complex or TiCl4 was used as a starting source of Ti, similar shaped anatase particles could be obtained by a careful choice of synthetic conditions. Using a mixed solvent of EDA and water, sheet-like titanic acid was produced as an intermediate phase, regardless of the EDA concentration. Therefore, the formation of anatase in the current system may take place through dissolution-recrystallization of titanic acid. The formation of square bipyramidal anatase particle achieved in the present study is not agreement with a reported theoretical calculation of equilibrium phase, because the calculation reveals that truncated square bipyramid-like anatase is obtained under an acidic condition and spindle-like anatase was formed under a basic condition. An adsorption of EDA on particle surface and the pH of the solvent may contribute to the achievement of morphological control.

DOI： 10.2109/jcersj2.120.494

Web of Science

researchmap

Synthesis of new thioaluminate phosphors (Ba_1-XSr_X)₄Al₂S₇:Eu and their luminescence properties 査読有り

Takahiko Hasegawa, Makoto Kobayashi, Hideki Kato, Hisanori Yamane, Masato Kakihana

Technical digest of the 12th International Meeting on Information Display 頁： 640-641 2012年8月

Impact of synthesis methodology on the optimization of photoluminescence emission intensity of NaBaScSi₂O₇:Eu²⁺ phosphor 査読有り国際誌

Sudeshna Ray, Kenji Toda, Shinnosuke Kamei, Tadashi Ishigaki, Kazuyoshi Uematsu, Mineo Sato, Hideki Kato, Makoto Kobayashi, Masato Kakihana

Technical digest of the 12th International Meeting on Information Display 頁： 128 - 129 2012年8月

Synthesis of the new compound in a Na-Sc-Si-O system and Luminescence properties activated by Eu²⁺ 査読有り国際誌

Jihong Min, Hideki Kato, Makoto Kobayashi, Hisanori Yamane, Masato Kakihana

Technical digest of the 12th International Meeting on Information Display 頁： 638-639 2012年8月

Synthesis of new thioaluminate phosphors (Ba_1-xSr_x)₄Al₂S₇:Eu and their luminescence properties 査読有り国際誌

Takahiko Hasegawa, Makoto Kobayashi, Hideki Kato, Hisanori Yamane, Masato Kakihana

Technical digest of the 12th International Meeting on Information Display 頁： 640-641 2012年8月

Synthesis of KSrPO₄:Eu²⁺ Phosphor with High Luminescence Property Using a Water-Soluble Phosphorus Precursor 査読有り国際誌

Minsung Kim, Makoto Kobayashi, Hideki Kato, Masato Kakihana

Technical digest of the 12th International Meeting on Information Display 頁： 130-131 2012年8月

Preparation of Hollow TiO² Spheres of the Desired Polymorphs by Layer-by-Layer Assembly of a Water-Soluble Titanium Complex and Hydrothermal Treatment 査読有り国際誌

Katagiri Kiyofumi, Inami Hitoshi, Koumoto Kunihito, Inumaru Kei, Tomita Koji, Kobayashi Makoto, Kakihana Masato

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY ( 20 ) 頁： 3267 - 3272 2012年7月

Morphology-Controlled Synthesis of W₁₈O₄₉ Nanostructures and Their Near-Infrared Absorption Properties 査読有り国際誌

Guo Chongshen, Yin Shu, Yan Mei, Kobayashi Makoto, Kakihana Masato, Sato Tsugio

INORGANIC CHEMISTRY 51 巻 ( 8 ) 頁： 4763 - 71 2012年4月

Hydrothermal synthesis of brookite-type titanium dioxide with snowflake-like nanostructures using a water-soluble citratoperoxotitanate complex 査読有り国際誌

Makoto Kobayashi, Valery Petrykin, Koji Tomita, Masato Kakihana

Jpurnal of Crystal Growth 337 巻 ( 1 ) 頁： 30 - 37 2011年12月

Hydrothermal synthesis of hierarchical TiO₂ microspheres using a novel titanium complex coordinated by picolinic acid 査読有り国際誌

Quang Due Truong, Kobayashi Makoto, Kato Hideki, Kakihana Masato

JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 119 巻 ( 1390 ) 頁： 513 - 516 2011年

記述言語：英語掲載種別：研究論文（学術雑誌）

Phase- and morphology-control of TiO2 was performed by a facile hydrothermal method using a novel water-soluble titanium–picolinato complex as a precursor. Single-phase rutile or brookite type titania can be obtained by tailoring the pH of the complex solution. Rutile with a hierarchical microstructure was synthesized using an excess amount of ligand as an additive and the final product consisted of microspheres with mesopores formed by a self-assembly of nanorods. The anisotropic growth of nanorods with a high aspect ratio was explained by a capping mechanism.

DOI： 10.2109/jcersj2.119.513

Web of Science

Scopus

researchmap

Application of Water-Soluble Titanium Complexes as Precursors for Synthesis of Titanium-Containing Oxides via Aqueous Solution Processes 招待有り査読有り国際誌

Masato Kakihana, Makoto Kobayashi, Koji Tomita, Valery Petrykin

Bulletin of Chemical Society of Japan 83 巻 ( 11 ) 頁： 1285 - 1308 2010年11月

記述言語：英語掲載種別：研究論文（学術雑誌）

The growing significance of nanocrystalline inorganic functional materials in the fields of catalysis, electronics, and energy conversion together with the increasing demand of the society for safer, softer, and “greener” technologies has drawn considerable attention of the researchers toward water-based solution processes for synthesis of such materials. In this respect complex oxides, containing d0-transition metals, such as Ti, Nb, Ta, or Si represent an outstanding challenge for materials chemists due to the extremely narrow range or almost complete absence of suitable precursor compounds compatible with aqueous systems. In the recent 10 years, a remarkable progress has been achieved in the development of new water-soluble complexes of titanium and considerable experience was accumulated in the application of these compounds for synthesis of nanocrystalline titanium-containing materials. The essential knowledge of coordination chemistry of such water-soluble titanium complexes is reviewed in this work, which succeeded to identify the key structural features responsible for stability of the compounds against hydrolysis and to provide guidelines for synthesis of these complexes. Finally, an extensive overview of highly selective aqueous solution based synthesis of TiO2 polymorphs as well as complex oxide materials with the help of the novel water-soluble titanium complexes is provided.

DOI： 10.1246/bcsj.20100103

Web of Science

researchmap

酸化チタンのテーラメイド合成招待有り査読有り

小林亮, 垣花眞人

現代化学 465 巻 ( 12 ) 頁： 57-62 2009年11月

新規水溶性チタン錯体を用いた水熱法による酸化チタン多形の選択的合成招待有り査読有り国際誌

垣花眞人, 小林亮, Petrykin Valery, 冨田恒之

粉体および粉末冶金 56 巻 ( 4 ) 頁： 188-193 2009年4月

記述言語：日本語掲載種別：研究論文（学術雑誌）

A panel of new stable and water soluble complexes of titanium (IV) with natural hydroxy-carboxylic acids such as citric, tartaric, lactic or glycolic acid as ligands was developed. A typical structure of these complex ions includes a peroxo-group, and a hydroxy-carboxylic acid molecule attached to the metal ion by carboxylic and hydroxylic groups to form stable species. The tight coordination and negative charge of complex ions are responsible for stability of these new compounds in water solutions in a wide range of temperatures and pH. Use of natural non-toxic ligands and ammonium as counterions make such titanium compounds convenient reagents for "green" synthesis of titanium containing materials by aqueous solution methods. The architecture of titanium complexes includes structural motifs of different polymorphic forms of TiO2, which allows for application of these compounds as building blocks (tecton) for synthesis of titania with different crystal structures by a simple hydrothermal processes. In this way anatase, rutile, TiO2(B) and brookite were prepared in a reproducible and highly selective way. For the first time TiO2(B) and brookite were synthesized as single phase nano-crystals by a "one-pot" hydrothermal process, and their outstanding photo-catalytic activities were revealed.

DOI： 10.2497/jjspm.56.188

researchmap

Hydrothermal synthesis of brookite type TiO₂ photocatalysts using a water-soluble Ti-complex coordinated by ethylenediaminetetraacetic acid 査読有り国際誌

Yusuke Morishima, Makoto Kobayashi, Valery Petrykin, Shu Yin, Tsugio Sato, Masato Kakihana, Koji Tomita

Journal of the Ceramic Society of Japan 117 巻 ( 1363 ) 頁： 320 - 325 2009年3月

Photocatalytic activity of nanocrystalline TiO₂(B) synthesized from titanium glycolate complex by hydrothermal method 査読有り国際誌

Kazuhiro Yamamoto, Hironori Shimoita, Koji Tomita, Kazumi Fujita, Makoto Kobayashi, Valery Petrykin, Masato Kakihana

Journal of the Ceramic Society of Japan 117 巻 ( 1363 ) 頁： 347 - 350 2009年3月

記述言語：英語掲載種別：研究論文（学術雑誌）

The metastable phase of TiO_2(B), one of the polymorphs of titanium dioxide (TiO_2), was prepared by a hydrothermal treatment of a titanium glycolate complex ([Ti_4(C_2H_2O_3)_4(C_2H_3O_3)_2(O_2)_4O_2]^<6->) at 473K for 1-72h in the presence of H_2SO_4. Characterization by X-ray diffraction (XRD) and transmission electron microscopy (TEM) revealed that the obtained samples were composed of single phase TiO_2(B) and the particles had plate-like morphology. After post-synthetic hydrothermal crystal growth (PHCG) applied to the as-prepared sample, thicker plate-like shaped particles were obtained. The photocatalytic activities of the samples obtained by the hydrothermal treatment and after the subsequent PHCG were evaluated in terms of methanol decomposition.

DOI： 10.2109/jcersj2.117.347

Web of Science

Scopus

researchmap

チタン錯体水溶液からの酸化チタン光触媒の合成招待有り査読有り

小林亮, Petykin Valery, 垣花眞人, 冨田恒之

化学工業 60 巻 ( 1 ) 頁： 71-77 2009年1月

Hydrothermal Synthesis and Photocatalytic Activity of Whisker-Like Rutile-Type Titanium Dioxide 査読有り国際誌

Makoto Kobayashi, Valery Petrykin, Masato　Kakihana, Koji Tomita

Journal of the American Ceramic Society 92 巻 ( 1 ) 頁： S21 - S26 2009年1月

　前のページ - 次のページ　

<小林 亮>

論文 - 小林 亮

<小林　亮>

論文 - 小林　亮