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Photo-Chemical Energy Conversion by Pillared Hydrotalcite

Research Project

Project/Area Number 63550570
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 無機工業化学
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

SATO Tsugio  Tohoku University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (90091694)

Co-Investigator(Kenkyū-buntansha) ENDO Tadashi  Tohoku University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (30176797)
SHIMADA Masahiko  Tohoku University, Faculty of Engineering, Professor, 工学部, 教授 (80029701)
Project Period (FY) 1988 – 1989
Project Status Completed (Fiscal Year 1989)
Budget Amount *help
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1989: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1988: ¥1,300,000 (Direct Cost: ¥1,300,000)
KeywordsHydrotalcite / Pillaered Compound / Photo-Chemical Energy Conversion / Photocatalyst / CdS / ZnS / Ultrafine powder
Research Abstract

CdS and CdS-ZnS mixed semiconductor particles were incorporated into the interlayer of hydrotalcite by the chemical reactions between Cd(edta)^<2-> and S^<2-> in the interlayer. The incorporated particles seemed to be small as less than 0.4 nm in thickness. The band gap energies of CdS and sequentially precipitated CdS followed by ZnS in the interlayer were slightly larger than that of normal-crystalline CdS. On the other hand, the band gap energy of CdS/ZnS mixture coprecipitated in the interlayer was almost equal to the average value of those of normal-crystalline CdS and ZnS. The CdS and CdS/ZnS mixture incorporated into hydrotalcite were capable of efficient hydrogen evolution by irradiation with visible light in the presence of Na_2S and/or Na_2SO_3 as a sacrificial donor. The hydrogen production activities of the catalyst incorporated in hydrotalcite were in the order of sequentially precipitated CdS followed by ZnS > simultaneously precipitated CdS-ZnS mixture >> CdS. Mass transfer problems of the products through the interlayer restricted the efficiency of the semiconductor incorporated into hydrotalcite for the visible light induced hydrogen evolution. Almost the same amounts of S_2O_6^<2-> and SO_4^<2-> were formed by the photochemical oxidation of SO_3^<2-> aqueous solution with unsupported CdS/ZnS, but that of S_2O_6^<2-> produced in the same reaction with CdS/ZnS incorporated into hydrotalcite significantly decreased.

Report

(3 results)
  • 1989 Annual Research Report   Final Research Report Summary
  • 1988 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] Tsugio Sato,Hiroshi Fujita,Tadashi Endo,Masahiko Shimada and Atsumu Tunashima: "Synthesis on Hydrotalcite-like Compounds and Their Physico-Chemical Properties" Reactivity of Solids. 5. 219-228 (1988)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Tsugio Sato,Hirosi Okuyama,Tadashi Endo and Masahiko Shimada: "Photocatalytic Properties of CdS Incorporated into Interlayer of Hydrotalcite" Reactivity of Solids.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Tsugio Sato, Hiroshi Fujita, Tadashi Endo, Masahiko Shimada and Atsumu Tsunashima: "Synthesis of Hydrotalcite-like Compounds and Their Physico-Chemical Properties" Reactivity of Solids, 5, 219-228, 1988.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Tsugio Sato, Hiroshi Okuyama, Tadashi Endo and Masahiko Shimada: "Photocatalytic Properties of CdS Incorporated into Interlayer of Hydrotalcite" Reactivity of Solids.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1989 Final Research Report Summary
  • [Publications] Tsugio Sato,Hiroshi Fujita,Takashi Endo,Masahiko Shimada and Atsumu Tunashima: "Synthesis on Hydrotalcite-like Compounds and Their Physico-Chemical Properties" Reactivity of Solids. 5. 219-228 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] Tsugio Sato,Hirosi Okuyama,Tadashi Endo and Masahiko Shimada: "Photocatalytic Properties of CdS Incorporated into Interlayer of hydrotalcite" Reactivity of Solids.

    • Related Report
      1989 Annual Research Report
  • [Publications] Tsugio,Sato.,Hiroshi,Fujita.,Tadashi,Endo.,Masahiko,Shimada: Reactivity of Solids. 5. 219-228 (1988)

    • Related Report
      1988 Annual Research Report
  • [Publications] Tsugio,Sato.,Hiroshi,Okuyama.,Tadashi,Endo.,Masahiko,Shimada: Reactivity of Solids.

    • Related Report
      1988 Annual Research Report

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Published: 1988-04-01   Modified: 2016-04-21  

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