TiO_2光触媒および窒素ドープTiO_2光触媒を用いたCN^-イオンの酸化分解 Oxidation Decomposition of Cyanide Ion Using TiO_2 and N-doped TiO_2 Photocatalysts

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著者

    • 佐貫 須美子 SANUKI Sumiko
    • 富山大学大学院理工学研究部 Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University
    • 片田 夕美 KATADA Yumi
    • 富山大学工学部物質生命システム工学科 Department of Material Systems Engineering and Life Science, Faculty of Engineering, Toyama University
    • 持舘 正輝 MOTTATE Masateru
    • 富山大学大学院理工学研究科 物質生命システム工学専攻 Graduate School of Science and Engineering, Toyama University

抄録

Oxidation decomposition reaction of CN<SUP>-</SUP> ion was studied using two types of TiO<SUB>2</SUB> photocatalysts and related nitrogen-doped photocatalysts. Although the oxidation products of CN<SUP>-</SUP> ion using TiO<SUB>2</SUB> powder consisting 30% rutile and 70% anatase demonstrated CNO<SUP>-</SUP>, followed by NO<SUB>3</SUB><SUP>-</SUP> and CO<SUB>3</SUB><SUP>2-</SUP>, the generation of CNO<SUP>-</SUP> was inhibited and the formation of molecular nitorogen was detected with TiO<SUB>2</SUB> composed of 100% anatase. Doping nitrogen to TiO<SUB>2</SUB> photocatalysts facilitates their use under visible light irradiation. Particularly, nitrogen-doped anatase type TiO<SUB>2</SUB> photocatalyst oxidized CN<SUP>-</SUP> ion to N<SUB>2</SUB> directly, while CNO<SUP>-</SUP> formation was greatly suppressed under the irradiation by sunlight. The use of nitrogen-doped anatase type TiO<SUB>2</SUB> photocatalyst under sunlight irradiation is useful as a novel decomposition method for spent CN<SUP>-</SUP> solution. Redox potential determination is effective to monitor CN<SUP>-</SUP> ion decomposition reaction.

収録刊行物

  • Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan  

    Journal of MMIJ : journal of the Mining and Materials Processing Institute of Japan 124(3), 190-195, 2008-03-25 

    The Mining and Materials Processing Institute of Japan

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各種コード

  • NII論文ID(NAID)
    10021121406
  • NII書誌ID(NCID)
    AA12188381
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    18816118
  • NDL 記事登録ID
    9440860
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-315
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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