Photoreduction of Ag ion on ZnO single crystal

Kinuyo Kawano, Manabu Komatsu, Yoshiyuki Yajima, Hajime Haneda, Hideyuki Maki, Taisei Yamamoto

研究成果: Article査読

33 被引用数 (Scopus)

抄録

The photoreduction of Ag ion was studied on ZnO single-crystal surface: Zn polar surface (0 0 0 1) and O polar surface (0 0 0 1̄). The single crystals were prepared by a hydrothermal process. Although Ag precipitate did not grow on a non-photocatalytic crystal, such as Al 2 O 3 , under UV irradiation, Ag ion in aqueous solution was rapidly reduced on ZnO single-crystal surface under UV irradiation. We found that the reactivity of Zn polar surface was higher than that of O polar surface and that the Ag deposition modes differed. To clarify the reaction mechanism, we performed a chemical analysis of the solution and Ag precipitates on ZnO surfaces by ICP and measured the pH of the solution. The results show that zinc ions were dissolved into solution from ZnO single-crystal surface, i.e., by photolysis, but there was less photolysis at the Zn than O polar surface.

本文言語English
ページ(範囲)265-270
ページ数6
ジャーナルApplied Surface Science
189
3-4
DOI
出版ステータスPublished - 2002 4 28
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)
  • 凝縮系物理学
  • 物理学および天文学(全般)
  • 表面および界面
  • 表面、皮膜および薄膜

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