Visible-Light Activity of Low-Temperature Plasma Treated TiO<SUB>2</SUB> and Its Dependence on the Raw Material TiO<SUB>2</SUB>

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  • 低温プラズマ処理酸化チタンの可視活性と原料酸化チタンの影響
  • テイオン プラズマ ショリ サンカ チタン ノ カシ カッセイ ト ゲンリョウ サンカ チタン ノ エイキョウ
  • Visible-Light Activity of Low-Temperature Plasma Treated TiO2 and Its Dependence on the Raw Material TiO2

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Vis activity was evaluated by the measurement of CO2 that was formed from 2-propanol under vis light irradiation in the presence of TiO2.<BR>It was found that plasma-treated ST-01 had the vis activity twice of a rutyl-type TiO2 (JRC-TIO-3). From TEM observation, crystalline size of a rutyl-type TiO2 (JRC-TIO-4) without a vis activity was found to correspond to that calculated according to Scherrer's equation, and the well arranged crystal array in the particle was confirmed. On the other hand, in ST-01, the crystal array was arranged with more turbulence and more amorphous region was observed. It was thought that this crystal condition influenced the vis-activity development.

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