Design and Development of Unique Photocatalytic Systems for the Decomposition of NOx

设计和开发用于分解氮氧化物的独特光催化系统

基本信息

  • 批准号:
    10044170
  • 负责人:
  • 金额:
    $ 2.05万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B).
  • 财政年份:
    1998
  • 资助国家:
    日本
  • 起止时间:
    1998 至 1999
  • 项目状态:
    已结题

项目摘要

Until now, photocatalytic reactions involving TiO2 photocatalysts for the decomposition of NOx were known to proceed only under UV light irradiation. In this research project, by the application of advanced metal ion-implantation with various transition metal ions such as V and Cr, it was found that novel TiO2 photocatalysts which absorb and operate efficiently under visible light irradiation for the decomposition of NOx could be developed. In-situ ESR and XAFS investigations revealed that the implanted V ions which exist as VィイD14+ィエD1 at the lattice position in place of TiィイD14+ィエD1 ion play a significant role in the shift in the absorption bands of TiO2 toward visible light regions. On the other hand, highly dispersed TiO2 catalysts anchored within the pore structure of the Y-zeolite by an ion-exchange method (Ti-Y zeolite) exhibited higher photocatalytic activity as compared to powdered TiO2. V or Cr ion-implantation on the Ti-Y zeolite also leads to a shift in the absorption band of the catalyst toward visible light regions and it was found that these V or Cr ion-implanted Ti-Y zeolites successfully decompose NOx under irradiation with visible light longer than 450nm, while maintaining just as a high photocatalytic activity as observed before applying ion-implantation. Furthermore, in-situ ESR and FT-IR investigations *lucidated the electron transfer from the photo-excited active site of the photocatalyst into the p anti-bonding molecular orbital of NO which led to a weakening of the N-O bond and initiated the decomposition of the NO molecule. It can be said that the present research has opened the way to many innovative possibilities, significantly to address urgent environmental problem and also as an important breakthrough in the utilization of solar energy.
到目前为止,利用TiO2光催化剂降解NOx的光催化反应仅在紫外光照射下进行。在本研究项目中,通过应用先进的金属离子注入各种过渡金属离子,如V和Cr,可以开发出新型的TiO2光催化剂,该催化剂在可见光照射下能够高效地吸收和运行于分解NOx。原位电子自旋共振和X射线光电子能谱研究表明,V离子以VィイD14+ィエD1形式存在于晶格位置,取代了TiィイD14+ィエD1离子,对TiO2光吸收谱带向可见光方向移动起着重要的作用。另一方面,通过离子交换方法固定在Y型沸石孔结构中的高分散TiO2光催化剂表现出比粉状TiO2光催化活性更高的光催化活性。V或Cr离子注入到Ti-Y分子筛上后,催化剂的吸收带向可见光方向移动,在450 nm以上的可见光照射下,这些分子筛成功地分解了NOx,同时保持了与注入前一样高的光催化活性。此外,现场ESR和FT-IR研究表明,电子从光催化剂的光激发活性中心转移到NO的p反键分子轨道上,导致N-O键减弱,启动了NO分子的分解。可以说,本研究为许多创新的可能性开辟了道路,对解决紧迫的环境问题意义重大,也是太阳能利用的重要突破。

项目成果

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专利数量(0)
山下弘巳: "イオンビームを利用する酸化チタン光触媒/活性炭素繊維系の創製"炭素. 185. 296-298 (1998)
Hiromi Yamashita:“使用离子束创建氧化钛光催化剂/活性碳纤维系统”Carbon。185. 296-298 (1998)
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安保正一: "可視光利用を目指した第二世代酸化チタン光触媒(季刊化学総説)(印刷中)" 学会出版センター, (1998)
安房庄一:“旨在利用可见光的第二代氧化钛光催化剂(化学评论季刊)(正在印刷中)”学会出版中心,(1998)
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Masakazu ANPO: "The Relationship between the Local Structure of Copper (I) Ions on Cu+/ZeoliteCatalysts and Their Photocatalytic Reacrivities for the Decomposition of Nox into N2 and O2 at 275K"Coord. Chem. Rev.. 171. 175-184 (1998)
Masakazu ANPO:“Cu/沸石催化剂上铜 (I) 离子的局域结构与其在 275K 下将 Nox 分解为 N2 和 O2 的光催化反应性之间的关系”Coord。
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    0
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Stanislaw DZWIGAJ: "Probing Different Kinds of Vanadium Species in the Vsib Zeolite by Diffuse Reflectance UV-Visible and Photoluminescence Spectroscopies"J. Phys. Chem. B. 102. 6309-6312 (1998)
Stanislaw DZWIGAJ:“通过漫反射紫外-可见光和光致发光光谱探测 Vsib 沸石中不同种类的钒形态”J。
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    0
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Masakazu ANPO: "Design and Cevelopment of Unique Titanium Oxide Photocatalysts Capable of Operating under Visible Light Irradiation by an Advanced Metal Ion-implantation Method"Stud. Surf. Sci. Catal. 121. 104-105 (1999)
Masakazu ANPO:“通过先进金属离子注入方法设计和开发能够在可见光照射下工作的独特氧化钛光催化剂”Stud。
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ANPO Masakazu其他文献

ANPO Masakazu的其他文献

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{{ truncateString('ANPO Masakazu', 18)}}的其他基金

Development of Efficient Water Splitting System Enabling Separate Evolution of H_2 and O_2 from Water Using an Unique Titanium Oxide Thin Film and Solar Light
开发高效水分解系统,利用独特的氧化钛薄膜和太阳光从水中分离出 H_2 和 O_2
  • 批准号:
    20360366
  • 财政年份:
    2008
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
The Design and Development of Novel Titanium Oxide Photocatalysts Prepared on the Various Plate Materials by an Advanced Ion Engineering Techniques
采用先进离子工程技术在各种板材上制备新型氧化钛光催化剂的设计与开发
  • 批准号:
    10650816
  • 财政年份:
    1998
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
Design and Development of Second-generation TiO2 Photocatalyst Operating under Solar Beam Irradiation for the Decomposition of NOx
太阳光照射下分解氮氧化物的第二代TiO2光催化剂的设计与开发
  • 批准号:
    09555272
  • 财政年份:
    1997
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Design of Active Photocatalytic System for Removal of NOx
活性光催化脱硝系统设计
  • 批准号:
    05044110
  • 财政年份:
    1993
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
Preparation of Photocatalysts in Micro-pores of Zeolite and Their Reaction Dynamics
沸石微孔光催化剂的制备及其反应动力学
  • 批准号:
    05453123
  • 财政年份:
    1993
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (B)
Design of Highly Active Photocatalytic System for the Removal of NOx
高活性光催化脱硝系统设计
  • 批准号:
    02044125
  • 财政年份:
    1990
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for international Scientific Research
Preparation of Ultra-Thin-Film Anchored Metal Oxide Catalysts Via Laser Excitation and Their Photocatalytic Activities
激光激发超薄膜锚定金属氧化物催化剂的制备及其光催化活性
  • 批准号:
    01550632
  • 财政年份:
    1989
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
Preparation of Highly Dispersed Anchored Catalysts by Photochemical Activation of Adsorbed Species and Their Photocatalytic Activities
吸附物质光化学活化制备高分散锚定催化剂及其光催化活性
  • 批准号:
    62550595
  • 财政年份:
    1987
  • 资助金额:
    $ 2.05万
  • 项目类别:
    Grant-in-Aid for General Scientific Research (C)
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