ISIR

The Institute of Scientific and Industrial Research, Osaka University

大阪大学
産業科学研究所

LAST UPDATE 2017/07/28

  • 研究者氏名
    Researcher Name

    趙成訓　CHO Sunghun
    助教　Assistant Professor

  • 所属
    Professional Affiliation

    大阪大学産業科学研究所
    The Institute of Scientific and Industrial Research, Osaka University

    先端ハード材料研究分野
    Department of Advanced Hard Materials

  • 研究キーワード
    Research Keywords

    ナノセラミック材料
    光触媒
    チタネート構造
    メカニズム分析
    水分解
    DSSCs
    Nano ceramic materials
    Photocatalyst
    Titanate structure
    Mechanism analysis
    Water splitting
    DSSCs
研究テーマ
Research Subject
チタネートのナノ構造の制作及び特性分析
Titanate nanostructures analysis and characterizations

研究の背景 Background

チタネートナノ構造体は高いイオン交換効率及びロード、チューブ、リボンなどの多様な形態を利用して様々な所に応用できる。本研究者はこのような点に注目し、チタネートの形成メカニズムを分析しこれを利用して光触媒ナノ材料の作成及び環境にやさしい材料の応用を把握し、水分解水素生産材料及びDSSCの応用研究を進めている。

Titanate nanostructures can be potential materials in the various fields of application due to their inherent ion-exchange capabilities and unique morphologies. I focus on the parameters on formation of Titanate nanostructure materials for the photo-catalyst nano-materials for environmental cleaning, water splitting system(hydrogen generation), and Dye Sensitized Solar Cell (DSSC).

研究の目標 Outcome

本研究は“水熱合成法を利用して作製したチタネートのナノ構造分析及び特徴”を介してそれぞれのチタネートナノ構造形成を把握し、それぞれの形態が形成される条件をマイクロ波水熱合成法及びアルカリ水溶液法を用いて実施する。またこれを利用して新たな光触媒材料を発展させ、その特徴を発展させる。

The main objective of the research is “Titanate nanostructures analysis and characterizations using hydrothermal process” is aimed to investigate synthesis parameters on the formation of titanate nanostructures from titanium dioxide powders through the Microwave assisted hydrothermal and  Aqueous solution with alkali process. Apply this knowledge for development of new photocatalyst materials with improved performance.

研究図Research Figure

TEM micrographs of Ag doped TiO2 nanotube. This confirms that silver nano particle of 3 to 5 nm size is added nanotube structure having 10nm size. Fig.2. The photocatalytic efficiency of different Titanate nanostructures was evaluated. Higher degree of organic dye adsorption was observed in the nanorod, nanosheet and nanotubes in comparison to particle phase.

Fig.3. When photocatalyst TiO2 absorbs UV radiation from sunlight or illuminated light source, it will produce pairs of electrons and holes. The electron of the valence band of titanium dioxide becomes excited when illuminated by light. The positive-hole of photocatalysts breaks apart the water molecule to form hydrogen gas and hydroxyl radical. The negative-electron reacts with oxygen molecule to form super oxide anion.

文献 / Publications

Catalysis Today., 266, 46 (2016). Materials Chemistry and Physics., 145, 297 (2014).

研究者HP