Development of Femtosecond Diffuse Reflectance Spectroscopy and Its Application to TiO2 Powder Catalysts.

• FURUBE Akihiro

  Department of Applied Physics, Osaka University

• ASAHI Tsuyoshi

  Department of Applied Physics, Osaka University

• MASUHARA Hiroshi

  Department of Applied Physics, Osaka University

Bibliographic Information

Other Title

• フェムト秒拡散反射分光法の開発と酸化チタン光触媒粉末への応用
• フェムトビョウ カクサン ハンシャ ブンコウホウ ノ カイハツ ト サンカ チタン ヒカリ ショクバイ フンマツ エ ノ オウヨウ

Abstract

Femtosecond diffuse reflectance spectroscopy for studying ultrafast photophysical and photochemical processes of optically scattering materials has been developed and applied to photocatalytic TiO₂ powders. It is demonstrated that the spectroscopy has the similar spectroscopic and temporal resolutions to those of transmittance mode transient absorption one. Temporal behavior of diffuse reflected light is analysed by extended Kubelka-Munk model and simulated numerically. Excitation energy relaxation processes of TiO₂ powders are measured directly in femtosecond to nanosecond time domains, and electron-hole charge separa-tion and recombination dynamics, and charge transfer to adsorbed molecules on TiO₂ surface are made clear. The results are discussed in terms of physical and structural properties of TiO₂ and environmental conditions.

Journal

• Journal of the Spectroscopical Society of Japan

  Journal of the Spectroscopical Society of Japan 48 (4), 143-153, 1999

  The Spectroscopical Society of Japan

Keywords

• diffuse reflectance
• ultrafast spectroscopy
• multiple scattering
• TiO<SUB>2</SUB>
• Photocayalyst

Details

• CRID: 1390001206258266624
• NII Article ID: 10002582831
• NII Book ID: AN00222531
• DOI: 10.5111/bunkou.48.143
• ISSN: 18846785
• ISSN: 00387002
• NDL BIB ID: 4833159
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4833159
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed