銀ナノシートを用いた酸化チタン非接触光触媒活性の評価

中田 武志, 楊 菲, 吉田 晃人, 立間 徹, 玉田 薫

研究成果: Contribution to journalArticle査読

抄録

Remote photocatalytic reaction of a Pt-modified TiO<SUB>2</SUB> thin film was investigated by using Ag nanosheet as a marker. The Ag nanosheet is a two-dimensional crystalline film composed of myristate-capped silver nanoparticles (d = 5 nm), which has a strong localized plasmon absorption band at <I>λ</I><SUB>max</SUB> = 470 nm. The Ag nanosheet on a 50 nm gold film was set on a measurement cell at 10 μm distance from the Pt-modified TiO<SUB>2</SUB> film. Then the refractive index change of Ag nanosheet was real-time monitored by a surface plasmon resonance (SPR) technique under UV light irradiation (wavelength: 365 nm) from the back side of the TiO<SUB>2</SUB> film. The plasmon resonance angle shifted to lower angle in consequence of the degradation of Ag nanosheet due to the remote photocatalytic reaction. We found the reaction was continued even after stopping UV irradiation, i.e., a chain reaction in Ag nanosheet was suggested. The chain reaction was influenced by N<SUB>2</SUB> gas purge as well as the ligand exchange of myristate capping molecules to alkyl thiolate.
寄稿の翻訳タイトルCharacterization of Remote Photocatalytic Activity of TiO_2 with Ag Nanosheet
本文言語日本語
ページ(範囲)727-732
ページ数6
ジャーナル表面科学 : hyomen kagaku = Journal of the Surface Science Society of Japan
32
11
DOI
出版ステータス出版済み - 11 10 2011

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