Magnetic field effects on the amount of active oxygen species released from semiconductor photocatalysts on light irradiation

磁场对半导体光催化剂在光照射下释放的活性氧数量的影响

• 批准号: 18550011
• 负责人: NAKAGAKI Ryoichi
• 金额: $ 2.45万
• 依托单位: Kanazawa University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18550011/
• 关键词: Photofunctional material; Active oxygen species; Surface reactions; Magnetic field effects; Radical reactions; Chemiluminescence; Photocatalysts; 酸化チタン

Superoxide anion radical (O_(2-)) and OH radical generations in suspensions of Ag metal^(-), Ag_(2)O^(-), or AgO-loaded TiO_(2) and BiVO_(4)photocatalysts in alkaline condition (at pH=12.0) were examined by means of luminal chemiluminescence(CL) and spin-trapping fluorescence technique where terephthalic acid reacts with an OH radical to afford the highly fluorescence 2-hydmxyterephthalic acie (TAOH). The observed luminal CL intensity was remarkably enhanced by the AgO loading on TiO_(2) and BiVO_(4), This can be explained in terms of augmentation of 0_(2-) production on the AgO-loaded photocatalysts due to synergetic effects on the thermocatlytic activity on the AgO surface and efficient electron-hole separation at the photocatalyst/Ag0 interface. On the other hand, the loading effects of AgO on the TAOH formation rates for the 1102 samples were much larger than those for the BiVO_(4) catalysts by ca. three orders of magnitude. The properties of 0_(2)-and OH radical generations on these photocatalysts are discussed on the basis of the luminal CL kinetids and approximate band edge positions of 710_(2), BiVO_(4), and silver oxides. No significant magnetic field effects were observed on the amount of active oxygen species released from semiconductor photocatalysts on light irradiation.

Ag金属^（-）、Ag_（2）O^（-）、Ag_（2）O_（-）悬浮液中超氧阴离子自由基和OH自由基的产生在碱性条件下，AgO负载的TiO_2和BiVO_4光催化剂（在pH=12.0时），用Luminal化学发光（CL）和自旋捕集荧光技术研究了对苯二甲酸与OH自由基反应产生的高荧光2-羟对苯二甲酸（TAOH）。在TiO 2和BiVO 4上负载AgO后，光致发光强度显著增强，这是由于AgO表面的热催化活性和光催化剂/Ag 0界面的有效电子-空穴分离协同作用，增加了AgO负载光催化剂上O2-的产生。AgO的负载量对1102催化剂TAOH生成速率的影响远大于BiVO 4催化剂。三个数量级。根据710_2、BiVO_4和银氧化物的光化学发光动力学和近似带边位置，讨论了这些光催化剂产生O_2-和OH自由基的性质。磁场对半导体光催化剂在光照下的活性氧释放量没有明显的影响。

项目成果

物理系薬学IV演習編

物理药剂 IV 练习

• 发表时间: 2008
• 作者: R. Nakagaki;K. Takahashi;S. Kohtani;日本薬学会(分担執筆)
• 通讯作者: 日本薬学会(分担執筆)

Technol., Deradation of benzo[a]pyrene using TiO_<2> and Ag-loaded BiVO_<4>

技术，使用 TiO_<2> 和负载 Ag 的 BiVO_<4> 去除苯并[a]芘

• 发表时间: 2007
• 期刊: photocatalysts : Evaluation by the Ames assay(J. Adv. Oxid. Technol) 10
• 作者: S. Kohtani;Y. Inaoka;K. Hayakawa;R. Nakagaki J. Ad. Oxid
• 通讯作者: R. Nakagaki J. Ad. Oxid

Photochemistry of large ring 2-phenylcycloalkanone in the presence of molecular oxygen

• DOI: 10.1016/j.jphotochem.2006.08.021
• 发表时间: 2007-02
• 期刊: Journal of Photochemistry and Photobiology A-chemistry
• 影响因子: 4.3
• 作者: Kazuya Takahashi;Takeyuki Watanabe;Shigeru Kohtani;R. Nakagaki

Photobiol A : Chemistry, Magnetic field and methylene chain Length effects on photochemistry of bichromophoric chain Species containing 7-nitro-2-fluorenyloxy and aniline Chromophores

Photobiol A：化学、磁场和亚甲基链长度对双发色团链光化学的影响含有 7-硝基-2-芴氧基和苯胺发色团的物种

• 发表时间: 2007
• 期刊: J. Photochem. Photobiol, A : Chemistry 191
• 作者: K. Takahashi;S. Kohtani;R. Nakagaki;J. Photochem
• 通讯作者: J. Photochem

Magnetic field and methylene chain length effect on photochemistry of Bichromophoric chain species containing 7-nitro-2-fluorenyloxy and Anilino chromophores

磁场和亚甲基链长度对含有 7-硝基-2-芴氧基和苯胺基发色团的双发色链物种光化学的影响

• 发表时间: 2007
• 期刊: Journal of Photochemistry and Photobiology A: Chemistry 191
• 作者: K. Takahashi;S. Kohtani;R. Nakagaki
• 通讯作者: R. Nakagaki