Photoelectrochemistry of hetero-structured epitaxial TiO_2 electrodes

• Project/Area Number: 20360294
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: MATSUMOTO Yuji Tokyo Institute of Technology, 応用セラミックス研究所, 准教授 (60302981)
• Project Period (FY): 2008 – 2010
• Project Status: Completed (Fiscal Year 2010)
• Budget Amount: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000); Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2009: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000); Fiscal Year 2008: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
• Keywords: 表面・界面物性 / 光電気化学 / 酸化物 / 薄膜 / 電気化学 / 光化学 / 表面・界面

Research Abstract

In this research PJ, we have got the following achievements through studies on photoelectrochemistry of TiO_2 and its related titanates single crystals and epitaxial films.
(1) Electric field dependent permittivity of TiO_2 was first found via electrochemical approach.
(2) A new PLD-EC system was developed for in situ electrochemical analysis of oxygen vacancy dynamics in TiO_2 films.
(3) The role of V dopant in photodeposition of Ag on V:TiO_2 films was revealed.
(5) A new synthesis root by photocatalysis was discovered for silver-oxide clathrate.

Research Products

• [Journal Article] Electrochemical impedance analysis of electric field dependence of the permittivity of SrTiO_3 and TiO_2 single crystals (2011)
  • Author(s): Y.Matsumoto, S.Takata, R.Tanaka, A.Hachiya
  • Journal Title: J.Appl.Phys. 109
  • Peer Reviewed
• [Journal Article] Electrochemical impedance analysis electric field dependence of the permittivity of SrTiO3 and TiO2 single crystals (2011)
  • Author(s): Y.Matsumoto, S.Takata, R.Tanaka, A.Hachiya
  • Journal Title: J.Appl.Phys. Volume: 109 Pages: 14112-14112
  • Peer Reviewed
• [Journal Article] Photocatalytic Synthesis of Silver-Oxide Clathrate Ag_7O_8NO_3 (2010)
  • Author(s): R.Tanaka, S.Takata, M.Katayama, R.Takahashi, J.K.Grepstad, T.Tybell, Y.Matsumoto
  • Journal Title: J.ElectroChem. 157
  • Peer Reviewed
• [Journal Article] Chemical trend of Fermi-level shift in transition metal-doped TiO_2 films (2010)
  • Author(s): Y.Matsumoto, M.Katayama, T.Abe, T.Ohsawa, I.Ohkubo, H.Kumigashira, M.Oshima, H.Koinuma
  • Journal Title: J.Ceram.Soc.Jpn 118 Pages: 993-996
  • Peer Reviewed
• [Journal Article] Photocatalytic Synthesis of Silver-Oxide Clathrate Ag708NO3 (2010)
  • Author(s): R.Tanaka, S.Takata, M.Katayama, R.Takahashi, J.K.Grepstad, T.Tybell, Y.Matsumoto
  • Journal Title: J.ElectroChem. Volume: 157
  • Peer Reviewed
• [Journal Article] Chemical trend of Fermi-level shift in transition metal-doped TiO2 films (2010)
  • Author(s): Y.Matsumoto, M.Katayama, T.Abe, T.Ohsawa, I.Ohkubo, H.Kumigashira, M.Oshima, H.Koinuma
  • Journal Title: J.Ceram.Soc.Jpn Volume: Vol.118 Pages: 993-996
  • NAID: 130000420729
  • Peer Reviewed
• [Journal Article] Appl. Phys. Lett. (2008)
  • Author(s): R. Takahashi
  • Journal Title: Photochemical switching of ultrathin PbTiO3 films 92
  • Peer Reviewed
• [Presentation] Semiconductor electrochemistry on well-defined TiO_2 single crystal surfaces (2010)
  • Author(s): Y.Matsumoto, R.Tanaka, S.Takata, A.Hachiya
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] Electric Field dependence of the permittivity for atomically flat TiO_2 single crystals investigated by electrochemical approach (2010)
  • Author(s): S.Takata, A.Hachiya, R.Tanaka, Y.Matsumoto
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] Photocatalytic synthesis of silver-oxide clathrate Ag_7NO_<11> (2010)
  • Author(s): Ryohei Tanaka, S.Takata, R.Takahashi, J.Grepstad, T.Tybell, Y.Matsumoto
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] In-situ electrochemical analyses of TiO_2 single crystals and thin films (2010)
  • Author(s): Shinataro Takata、Yuji Matsumoto
  • Organizer: ISIMME2010
  • Place of Presentation: Holiday Inn Changzou Wujin, Changzou, China
• [Presentation] クラスレート型Ag_6O_8AgNo_3の光電気化学合成 (2010)
  • Author(s): 田中亮平、高田真太郎、高橋竜太、Jostein Grepstad, Thomas Tybell, 松本祐司
  • Organizer: 2010年秋季 第71回 応用物理学会学術講演会
  • Place of Presentation: 長崎大学 文教キャンパス
• [Presentation] V:TiO_2/Nb:TiO_2 (110)電極の光電流・光銀析出反応の表面V濃度依存 (2010)
  • Author(s): 蜂谷篤史, 松本祐司
  • Organizer: 2010年秋季 第71回 応用物理学会学術講演会
  • Place of Presentation: 長崎大学 文教キャンパス
• [Presentation] 電気化学的手法による酸化物半導体物性のin-situ評価法の開発 (2010)
  • Author(s): 高田真太郎, 蜂谷篤史、田中亮平、松本祐司
  • Organizer: 2010年秋季 第71回 応用物理学会学術講演会
  • Place of Presentation: 長崎大学 文教キャンパス
• [Presentation] In-situ electrochemical analyses of Tio2 single crystals and thin films (2010)
  • Author(s): Shinataro Takata、Yuji Matsumoto
  • Organizer: ISIMME2010
  • Place of Presentation: Holiday INN Changzou Wujin, Changzou, China
• [Presentation] Semiconductor electrochemistry on well-defined TiO2 single crystal surfaces (2010)
  • Author(s): Yuji Matsumoto、R.Tanaka, S.Takata, A.Hachiya
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] Photocatalytic synthesis of silver-oxide clathrate Ag7NO11 (2010)
  • Author(s): Ryohei Tanaka, S.Takata, R.Takahashi, J.Grepstad, T.Tybell, Y.Matsumoto
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] Electric Field dependence of the permittivity for atomically flat TiO2 single crystals investigated by electrochemical approach (2010)
  • Author(s): S.Takata, A.Hachiya, R.Tanaka, Y.Matsumoto
  • Organizer: The International Chemical Congress of Pacific Basin Societies
  • Place of Presentation: Sheraton Waikiki Honolulu
• [Presentation] TiO_2単結晶電極のフラットバンド電位の結晶面依存性 (2010)
  • Author(s): 高田真太郎、蜂谷篤史、松本祐司
  • Organizer: 電気化学第77回大会
  • Place of Presentation: 富山大学 五福キャンパス
• [Presentation] V:TiO_2/Nb:TiO_2(110)ヘテロエピタキシャル電極の作製と電気化学評価 (2010)
  • Author(s): 蜂谷篤史,高田真太郎、小室雄太郎、松本祐司
  • Organizer: 電気化学第77回大会
  • Place of Presentation: 富山大学 五福キャンパス
• [Presentation] クラスレート型銀酸化物(Ag_6O_8AgNO_3)の光触媒合成 (2009)
  • Author(s): 田中亮平
  • Organizer: 電気化学第7 6回大会
  • Place of Presentation: 京都大学吉田キャンパス
  • Year and Date: 2009-03-31
• [Presentation] SrTi0_3(100)単結晶電極を用いた硝酸銀水溶液中での光電気化学反応 (2009)
  • Author(s): 高田真太郎
  • Organizer: 電気化学第7 6回大会
  • Place of Presentation: 京都大学吉田キャンパス
  • Year and Date: 2009-03-31
• [Presentation] Epilayer Control of Photocatalysis at Well-defined Oxide Surface and Interface (2009)
  • Author(s): Y.Matsumoto
  • Organizer: Hokkaido University CRC International Symposium on "Innovation Driven by Catalysis-past, present and future"-dedicated to the 20th anniversary of CRC
  • Place of Presentation: Hokkaido Univ.CRC(invited)
• [Presentation] Photocatalytic synthesis of Silver-Oxide Clathrate Ag_6O_8AgNO_3 (2009)
  • Author(s): Ryohei Tanaka、Yuji Matsumoto
  • Organizer: ISIMME2009
  • Place of Presentation: Sichuan University.
• [Presentation] Electrochemical approach to studies on heterointerfaces of transition metal oxides (2009)
  • Author(s): Y.Matsumoto
  • Organizer: ISIMME2009
  • Place of Presentation: Sichuan University.
• [Presentation] Precision Analysis of Mott-Schottky Plot for A Heavily Doped N-Type SrTiO_3(001) (2009)
  • Author(s): Y.Matsumoto, R.Tanaka, S.Takata
  • Organizer: STAC-3
  • Place of Presentation: Yokohama
• [Presentation] Precision Analysis of Mott-Schottky Plot for A Heavily Doped N-Type SrTiO_3(001) (2009)
  • Author(s): 松本祐司、田中亮平、高田真太郎
  • Organizer: The Third International Conference on the Science and Technology for Advanced Ceramics (STAC-3)
  • Place of Presentation: メルパルク横浜
• [Presentation] 遷移金属酸化物界面の電気化学的アプローチ (2009)
  • Author(s): 松本祐司
  • Organizer: 基盤研究A「遷移金属酸化物界面における新規強相関電子状態の放射光分光と探索」研究会
  • Place of Presentation: 筑波温泉ホテル(招待)
• [Presentation] Nb:SrTiO3 単結晶基板上のエピタキシャルBaTiO3薄膜の光触媒反応と自己分析現象 (2009)
  • Author(s): 田中亮平、高田真太郎、組頭広志、尾嶋正治、松本祐司
  • Organizer: 2009電気化学秋季大会
  • Place of Presentation: 東京農工大学
• [Presentation] NbドープTiO2(110)単結晶の誘電率電界依存症の電気化学評価 (2009)
  • Author(s): 高田真太郎、蜂谷篤史、田中亮平、松本祐司
  • Organizer: 2009電気化学秋季大会
  • Place of Presentation: 東京農工大学
• [Presentation] Photocatalytic synthesis of Silver-Oxide Clathrate Ag6O8AgNO3 (2009)
  • Author(s): Ryohei Tanaka、Yuji Matsumoto
  • Organizer: The 4^<th> International Symposium on Integrated Molecular/Materials Engineering (ISIMME2009)
  • Place of Presentation: Sichuan University
• [Presentation] Electrochemical approach to studies on heterointerfaces of transition metal oxides (2009)
  • Author(s): Yuji Matsumoto
  • Organizer: The 4^<th> International Symposium on Integrated Molecular/Materials Engineering (ISIMME2009)
  • Place of Presentation: Sichuan University
• [Presentation] Epilayer Control of Photocatalysis at Well-defined Oxide Surface and Interface (2009)
  • Author(s): 松本祐司
  • Organizer: Hokkaido University CRC International Symposium on "Innovation Driven by Catalysis-past, present and future"-dedicated to the 20th anniversary of CRC
  • Place of Presentation: 北海道大学 触媒化学研究センター(招待)
• [Presentation] 酸化物ヘテロナノ構造の光電気化学 (2008)
  • Author(s): 松本 祐司
  • Organizer: ワークショップ「酸化物ナノ構造の基礎と応用-化学と物理の融合」
  • Place of Presentation: 東北大学 金属材料研究所
  • Year and Date: 2008-11-17
• [Presentation] クラスレート型銀酸化物(Ag_6O_8AgN0_3)の光触媒合成 (2008)
  • Author(s): 田中 亮平
  • Organizer: ワークショップ「酸化物ナノ構造の基礎と応用-化学と物理の融合」
  • Place of Presentation: 東北大学 金属材料研究所
  • Year and Date: 2008-11-17