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
- 来源:
- 关键词:
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,已知涉及用于分解NOx的TiO 2光催化剂的光催化反应仅在UV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与各种过渡金属离子,如V和Cr,它被发现,可以开发新的TiO 2光催化剂,吸收和有效地运行在可见光照射下的NOx的分解。原位ESR和XAFS研究表明,注入的V离子以V D14+ V D1的形式取代Ti D14 + V D1的晶格位置,使TiO 2的吸收带向可见光区移动。另一方面,通过离子交换法固定在Y-沸石的孔结构内的高度分散的TiO 2催化剂(Ti-Y沸石)与粉末TiO 2相比表现出更高的光催化活性。在Ti-Y沸石上的V或Cr离子注入也导致催化剂的吸收带向可见光区域的偏移,并且发现这些V或Cr离子注入的Ti-Y沸石在用长于450 nm的可见光照射下成功地分解NOx,同时保持与应用离子注入之前观察到的一样高的光催化活性。此外,原位ESR和FT-IR研究表明,光催化剂活性中心的电子转移到NO的p反键轨道上,导致N-O键的弱化,引发NO分子的分解。可以说,目前的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具有重要意义,也是太阳能利用的重要突破。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
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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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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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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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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Masakazu ANPO: "Generation of Superoxide Ions at Oxide Surfaces"Topics in Catal.. 8. 189-198 (1999)
Masakazu ANPO:“在氧化物表面生成超氧离子”主题在 Catal.. 8. 189-198 (1999)
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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)