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Photocatalytic degradation of water contaminants using π-conjugated polymers

Research Project

Project/Area Number 10680538
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 環境保全
Research InstitutionToyama University

Principal Investigator

HASEGAWA Kiyoshi  Toyama University, Chemistry, Professor, 工学部, 教授 (20019186)

Co-Investigator(Kenkyū-buntansha) KAGAYA Shigehiro  Toyama University, Chemistry, Assistant, 工学部, 助手 (50272894)
KANBARA Takaki  Toyama University, Chemistry, Assistant Professor, 工学部, 助教授 (90204809)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 1999: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1998: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsAgrochemicals / Visible light-induced photocatalytic degradtion / π-Conjugated polymer / Polyoctylthiophene film / Photosensitized reaction / Photo-Phenton reaction / Active oxygen species / Treatment of waste water / 光触媒 / 光触媒反応
Research Abstract

Visible light-induced photocatalytic degradation of iprobenfos pesticide using poly(3-octylthiophene-2,5-diyl) (POTh) film was studied. Addition of FeィイD12+ィエD1 to an aqueous solution of the pesticide and the use of the POTh film blend with sensitizers and/or radical scavengers promoted the degradation of iprobenfos. Active oxygen species formed on the POTh film and degradation mechanism of iprobenfos by the OH radical was also examined. Following results were obtained.
1. An aqueous solution of Iprobenhos (10 ppm) was put into a test tube coated with POTh and the solution was irradiated under light of λ>380 nm by varying oxygen pressure of bubbling gas.
2. The formation process of the active oxygen species (02・ィイD1-ィエD1 → HィイD22ィエD20ィイD22ィエD2 → OH) was elucidated.
3. The acceleration of the degradation by FeィイD12+ィエD1 addition was explained by the increase in the concentration of the OH radical formed via the photo-Fenton reaction.
3. Enhancement of the degradation rate and the stabilization of the film was accomplished by blending perylene (sensitizer) and N,N,N',N'-tetramethylbenzidine (cation scavenger) with the POTh film. The result can be explained by energy transfer and/or electron transfer from excited perylene (Per*) to POTh.
4. The degradation path which the OH radical attacks on the benzene ring and the side group of iprobenfos was suggested.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] C. Wen: "Visible light-induced catalytic degradation of iprobenfos fungicide by poly(3-octythiophene-2,5-deyl) film"J. Photocem. Photobiol. A.. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] C. Wen: "Visible light-induced catalytic degradation of iprobenfos fungicide by poly(3-octylthiophene-2,5-diyl) film"J. Photochem. Photobiol. A. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Hasegawa et al.: "Visible light-induced catalytic degradation of iprobenfos fungicide by poly(3-octylthiophene-2,5-diyl) film"J. Photocem. Photobiol. A. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Hasegawa: "Photocatalyzed degradation of agrochemicals using poly(2,5-dihexoxy-p-phenylene) and poly(3-octylthiophene-2,5-diyl) films" JOURNAL OF MATERIALS SCIENCE LETTERS. 18印刷中. (1999)

    • Related Report
      1998 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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