Fine Chemical Synthesis on Metal Nanoparticle Photocatalysts

金属纳米粒子光催化剂的精细化学合成

• 批准号: 23360349
• 负责人: HIRAI Takayuki
• 金额: $ 12.06万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23360349/
• 关键词: 光触媒; 有機合成; 金属ナノ粒子; 金; 白金; パラジウム; 合金; 半導体酸化物; 可視光; イミン; ワンポット; 部分酸素化

Efficient and selective photocatalytic reactions have been achieved with the photocatalysts loaded with metal nanoparticles. We clarified that several reactions such as secondary amine synthesis from alcohol and nitroaromatics, dehalogenation of aromatic halides, and hydrogen peroxide production by the catalysts loaded with Pd, Pt-Pd alloy, and Au-Ag alloy nanoparticles. In particular, we found that Au or Pt nanoparticles when loaded on titanium dioxide promotes efficient aerobic oxidation via the absorption of visible light by the particles followed by the transfer of excited electrons to semiconductor conduction band. In addition, supported Au-Cu alloy particles efficiently promote aerobic oxidation, although the activity decreases with by the oxidation of surface Cu atoms. We found that visible light irradiation successfully reduces the oxidized surface Cu via the visible light absorption by Au atoms, thus maintaining high oxidation activity.

负载金属纳米粒子的光催化剂实现了高效、选择性的光催化反应。我们澄清了几种反应，如从醇和硝基芳烃合成仲胺，芳香卤化物的脱卤，过氧化氢的催化剂负载钯，pt -钯合金和金-银合金纳米颗粒。特别是，我们发现，当负载在二氧化钛上时，Au或Pt纳米粒子通过吸收可见光促进有效的有氧氧化，然后将激发的电子转移到半导体导带。此外，负载型Au-Cu合金颗粒能有效促进好氧氧化，但活性随着表面Cu原子的氧化而降低。我们发现可见光照射通过Au原子对可见光的吸收，成功地还原了被氧化表面的Cu，从而保持了较高的氧化活性。

项目成果

Pt-Cu bimetallic alloy nanoparticles supported on anatase TiO2: highly active catalysts for aerobic oxidation driven by visible light.

• DOI: 10.1021/nn403954p
• 发表时间: 2013-09
• 期刊: ACS nano
• 影响因子: 17.1
• 作者: Yasuhiro Shiraishi;Hirokatsu Sakamoto;Yoshitsune Sugano;S. Ichikawa;T. Hirai

One-pot synthesis of imines from alcohols and amines with TiO2 loading Pt nanoparticles under UV irradiation.

• DOI: 10.1039/c0cc05615d
• 发表时间: 2011-04
• 期刊: Chemical communications
• 影响因子: 4.9
• 作者: Yasuhiro Shiraishi;M. Ikeda;D. Tsukamoto;S. Tanaka;T. Hirai

Pt Nanoparticles Supported on anatase TiO2 as Highly Active Plasmonic Photocatalysts for Aerobic Oxidation

锐钛矿型 TiO2 负载的 Pt 纳米粒子作为高活性等离子光催化剂用于有氧氧化

• 作者: 菅野義経;ら;白石康浩;金澤俊介;平川裕章;平川裕章;菅野 義経
• 通讯作者: 菅野 義経

Rutile Crystallites Isolated from Degussa (Evonik) P25 TiO2: Highly Efficient Photocatalyst for Chemoselective Hydrogenation of Nitroaromatics

• DOI: 10.1021/cs400532p
• 发表时间: 2013-09
• 期刊: ACS Catalysis
• 影响因子: 12.9
• 作者: Yasuhiro Shiraishi;H. Hirakawa;Yoshiki Togawa;Yoshitsune Sugano;S. Ichikawa;T. Hirai

白金ナノ粒子担持酸化タングステンによるシクロヘキサンの選択的可視光部分酸化

使用铂纳米粒子负载的氧化钨选择性可见光部分氧化环己烷

• 发表时间: 2010
• 作者: 菅野義経;白石康浩;平井隆之
• 通讯作者: 平井隆之