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Dye-sensitized mesoporous Ta3N5 photocatalysts for water splitting under visible light with longer wavelengths up to ~600 nm

Research Project

Project/Area Number 26810125
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Inorganic industrial materials
Research InstitutionKyushu University

Principal Investigator

GUO LIMIN  九州大学, カーボンニュートラル・エネルギー国際研究所, 学術研究員 (60700143)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsphotocatalysis / photocatalyst / mesoporous / crystalline / Ta3N5 / water splitting / organic dye
Outline of Final Research Achievements

On the basis of sol-gel method, high surface area mesoporous Ta2O5 (117 m2/g) and crystalline mesoporous Ta3N5 (44 m2/g), which can adsorb visible light up to 600 nm, has been successfully synthesized. For the crystalline mesoporous Ta2O5, the photocatalytic performace demonstrated three times higher than that of noporous courtpart. For the Ta3N5, however, the performance are not ideal. Although the surface area of mesoporous Ta3N5 were dramatically increased comparing with bulk counterparts, the crystallinity was still low, which is disadvantage and easily results in the combination of photo-induced electron and hole. Several organic dyes have been used to improve the charge separation and photocatalytic activity of the catalysts. Some interesting phenomena was observed, although the overall water splitting has not be achieved. The correponding results will be published in near future. Now, I am trying to increase the crystallinity of the as-synthesized mesoporous Ta3N5.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (5 results)

All 2016 2015 2014

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] In situ carbonization of a soft-template to directly synthesize crystalline mesoporous metal oxides with high surface areas2014

    • Author(s)
      Guo, L., Ida, S., Daio, T., Hagiwara, H., Ishihara, T.
    • Journal Title

      New Journal of Chemistry

      Volume: 38 Issue: 12 Pages: 5846-5855

    • DOI

      10.1039/c4nj01034e

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] Direct way to crystalline mesoporous Ta2O5 and its photocatalytic activity for overall water splitting2016

    • Author(s)
      Limin GUO
    • Organizer
      Pure and Applied Chemistry International Conferences 2016
    • Place of Presentation
      Bangkok, Thailand
    • Year and Date
      2016-02-09
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Water oxidation on mesoporous Ta3N5 photocatalysts under visible light2015

    • Author(s)
      Limin GUO
    • Organizer
      The International Chemical Congress of Pacific Basin Societies 2015
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2015-12-15
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Direct access to crystalline mesoporous Ta2O5, Ta3N5, and their photocatalytic activity for overall water splitting2014

    • Author(s)
      Limin GUO
    • Organizer
      Materials Research Society of USA
    • Place of Presentation
      Boston, USA
    • Year and Date
      2014-12-04
    • Related Report
      2014 Research-status Report
  • [Presentation] Soft-Templating Method to Access Crystalline Mesoporous Tantalum Oxide/Nitride2014

    • Author(s)
      Limin GUO
    • Organizer
      2014 INTERNATIONAL CONFERENCE FOR TOP AND EMERGING MATERIALS SCIENTISTS
    • Place of Presentation
      Zhuhai, China
    • Year and Date
      2014-07-20
    • Related Report
      2014 Research-status Report
    • Invited

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Published: 2014-04-04   Modified: 2017-05-10  

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