Active Site Structure and Local Electronic States of Photocatalysts by Space-resolved Spectroscopy using STM

使用 STM 进行空间分辨光谱研究光催化剂的活性位点结构和局域电子态

• 批准号: 11450306
• 负责人: KOMIYAMA Masaharu
• 金额: $ 6.78万
• 依托单位: Okazaki National Research Institutes (2001)University of Yamanashi (1999-2000)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450306/
• 关键词: scanning tunneling microsopy; STM; photocatalyst; titamium oxide; (110)face; 光査型トンネル顕微鏡; 空間分解分光法; 光励起; トンネル発光

An apparent local surface structural change at nanoscale was observed by scanning tunneling microscopy (STM) on a TiOs surface upon illumination of ultra-violet (UV) light. This phenomenon was reversible with UV light irradiation, and was interpreted to be due to the local accumulation of photoexcited states. This is the first real-space observation of inhomogeneous local charge distribution under UV light irradiation at nanoscale on a semiconductive photocatalyst surface, which may help identifying the photocatalytic active sites and elucidating the reaction mechanisms over them.

在紫外 (UV) 光照射下，通过扫描隧道显微镜 (STM) 在 TiO2 表面观察到明显的纳米级局部表面结构变化。这种现象在紫外线照射下是可逆的，并被解释为由于光激发态的局部积累所致。这是首次在半导体光催化剂表面纳米级紫外光照射下观察到不均匀局部电荷分布，这可能有助于识别光催化活性位点并阐明其反应机制。

项目成果

Y.Li, D.Yin, M.Komiyama: "Local Electronic Structure on TiO_2 Surface under UV Light Irradiation"Japanese Journal of Applied Physics. (印刷中).

Y.Li、D.Yin、M.Komiyama：“紫外光照射下 TiO_2 表面的局域电子结构”，日本应用物理学杂志（出版中）。

Y.Li, D.Yin, M.Komiyama: "Local Electronic Structure on TiO_2 Surface under UV Light Irradiation"Japanese Journal of Applied Physics. (in press).

Y.Li，D.Yin，M.Komiyama：“紫外光照射下TiO_2表面的局域电子结构”日本应用物理学杂志。

D.Yin, M.Komiyama: "TiO_2(110) Surface Preparation by UV Light Irradiation for STM Observations"Japanese Journal of Applied Physics. 40. 4281-4284 (2001)

D.Yin，M.Komiyama：“用于 STM 观测的紫外光照射的 TiO_2(110) 表面制备”日本应用物理学杂志。

Y. Li, D. Yin and M. Komiyama: "Local Electronic Structure on TiO2 Surface under UV Light Irradiation"Jpn. J. Appl. Phys. (in press).

Y. Li、D. Yin 和 M. Komiyama：“紫外光照射下 TiO2 表面的局域电子结构”Jpn。

D. Yin and M. Komiyama: "TiO_2(11O) Surface Preparation by UV Light Irradiation for STM Observations"Jpn. J. AppL Phys. 40. 4281-4284 (2001)

D. Yin 和 M. Komiyama：“用于 STM 观察的紫外光照射的 TiO_2(11O) 表面制备”Jpn。