Establishment of photocatalyst systems act on the overall splitting of H_2O with high efficiency

光触媒系统的建立作用于H_2O的整体高效分解

• 批准号: 21550191
• 负责人: SAKATA Yoshihisa
• 金额: $ 3.16万
• 依托单位: Yamaguchi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21550191/
• 关键词: 光触媒; 水分解反応; 高活性化; 酸化ガリウム; タンタル混合酸化物; 金属イオン添加; 調製法; 助触媒; 水の完全分解; 量子収率; 光強度依存性; タンタル; 混合酸化物; チタン; チタン混合酸化物; 修飾; 水素製造; バリウムータンタル複合酸化物; Znイオンドープ

The influences of modifications to Ga_2O_3 and Ba-Ta mixed oxide photocatalysts towards the photocatalytic activity of H-2O splitting are investigated to develop photocatalyst systems which act on the overall splitting of H_2O with high efficiency. As the results, combination of the modifications as the suppression of the reverse reaction of the intermediates over the photocatalyst surfaces by the combination of effective co-catalyst, the suppression of the recombination of photo-produced electron and hole in the bulk of photocatalyst by controlling the bulk states by the addition of metal ions, and controlling the morphology by changing the preparation condition makes the photocatalytic activity improved remarkably, where the quantum yields shows more than 50%. Moreover, we also show that the quantum yield of photocatalytic H_2O splitting depends on the photon density of the irradiated light. On the basis of the result, we try to improve the photocatalytic performance on titanium mixed oxide photocatalysts.

研究了Ga_2O_3和Ba-Ta混合氧化物光催化剂的修饰对H-2O光催化分解活性的影响，以开发高效整体分解H_2O的光催化剂体系。结果表明，通过有效助催化剂的组合抑制中间体在光催化剂表面上的逆反应，通过控制光催化剂本体中光生电子和空穴的复合来抑制光催化剂内部光生电子和空穴的复合。通过添加金属离子形成体态，并通过改变制备条件控制形貌，使光催化活性显着提高，量子产率超过50%。此外，我们还表明光催化H_2O分裂的量子产率取决于照射光的光子密度。在此结果的基础上，我们尝试提高钛混合氧化物光催化剂的光催化性能。

项目成果

Preparation of a semiconductive compound obtained by the pyrolysis of urea under N2 and the photocatalytic property under visible light irradiation

N2下尿素热解半导体化合物的制备及可见光照射下的光催化性能

• 发表时间: 2011
• 影响因子: 5.3
• 作者: Y.Sakata

Remarkable Improvement of Photocatalytic Activity of Ga2O3 Towards Overall Splitting of H2O

Ga2O3 对 H2O 整体分解的光催化活性显着提高

• 发表时间: 2011
• 影响因子: 8.4
• 作者: Y.Sakata

金属イオンを添加したGa_2O_3光触媒の水の完全分解反応に対する特性

添加金属离子的Ga_2O_3光催化剂完全分解水的特性

• 发表时间: 2011
• 作者: 安永怜

酸化ガリウム光触媒による水の完全分解反応に対する金属イオンの添加効果

金属离子的添加​​对氧化镓光催化剂完全分解水反应的影响

• 发表时间: 2010
• 作者: 酒多喜久

Photocatalytic property of a semiconducting compound prepared from urea under visible light irradiation

可见光照射下尿素制备的半导体化合物的光催化性能

• 发表时间: 2010
• 作者: Y. Sakata; K. Yoshimoto; K. Kawaguchi; H. Imamura; S. Higashimoto
• 通讯作者: S. Higashimoto