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Dinitrogen Fixation Using Conducting Polymer/Titanium Oxide Junction

Research Project

Project/Area Number 13640590
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 物質変換
Research InstitutionChiba University

Principal Investigator

HOSHINO Katsuyoshi  Department of Information and Image Sciences, Faculty of Engineering, Chiba University, Associate Professor, 工学部, 助教授 (50192737)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥2,900,000 (Direct Cost: ¥2,900,000)
KeywordsNitrogen Fixation / Titanium Oxides / Conducting Polymers / Organics / Inorganics Hybrid Materials / Semiconductors / Electrochemistry / Photocatalysts / Material Conversion
Research Abstract

Nitrogen fixation systems driven by white light under mild conditions was investigated. The typical system consists of titanium oxide (TiO_x) and poly(3-methylthiophene)(P3MeT), and their heterojunction is previously shown to produce ammonium salt crystals (NH_4ClO_4) when exposed to white light in air at 20℃ and 40%RH. The purpose of this study is to identify the nitrogen-fixation products and to obtain the information on the fixation mechanism. X-ray photoelectron spectroscopic analyzes of the junctions before and after the photoirradiation revealed that ammonia is also formed as one of the fixation products. Additionaly, the combination of quantification of the products and electron-dispersive analysis of X-rays revealed that the reaction is initiated by annmonia formation (at the TiO_x/P3MeT interface) and followed by its partial conversion into NH_4ClO_4 in the P3MeT bulk. Further investigations showed the contribution of water molecules and polaron/biporaron species in the P3MeT film to the fixation reaction. These results led to the materials/device structures and increasing the efficiency of the light-to-chemical energy conversion.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 星野 勝義: "有機/無機半導体接合を用いた空中窒素固定"触媒. 44. 323-327 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tomohisa Ogawa: "Visible-Light Sensitive, Highly-Reactive, and Long-Standing Nitrogen Fixation under Ordinary Pressure and Temperature"Journal of Physical Chemistry B. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 星野 勝義(共著): "無機/高分子ナノ界面制御"高分子学会. 36 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Katsuyoshi Hoshino: "Dinitrogen Fixation Using Organic/Inorganic Hybrid Junctions"Catalysts & Catalysis. 44-5. 323-327 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tomohisa Ogawa: "Visible-Light Sensitive, Highly-Reactive, and Long-Standing Nitrogen Fixation under Ordinary Pressure and Temperature"Journal of Physical Chemistry B. in press.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Katsuyoshi Hoshino: "Improvement in Organics/Inorganics Junction Interfaces , Control of Inorganics/Polymers Nano-Interfaces"the Society of Polymer Science. 36 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 星野 勝義: "有機/無機半導体接合を用いた空中窒素固定"触媒. 44・5. 323-327 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 星野 勝義 (共著): "無機/高分子ナノ界面制御"高分子学会. 36 (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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