Synthesis of highly crystallized particles of transition metal oxynitrides and construction of a photocatalytic system for visible light water splitting.

过渡金属氮氧化物高度结晶颗粒的合成以及可见光分解水的光催化系统的构建。

• 批准号: 20760526
• 负责人: TAKATA Tsuyoshi
• 金额: $ 2.75万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760526/
• 关键词: 光触媒; オキシナイトライド; エネルギー変換; 水分解; 可視光; フラックス; 異元素ドーピング; 微粒子; 水素; フラックス法; ドーピング

Some d0-type transition metal oxynitrides were studied as photocatalyst for water cleavage to improve their performance. A new route to obtain oxynitride particles by flux assisted nitridation method was established. Highly crystallized and mono-disperse fine particles of oxyntrides were obtained by the addition of NaCl or Na_2CO_3 as a flux. Regarding the synthesis of multi-components-oxynitrides, the addition of flux resulted in the improvement of the mixing state of constituents, which enabled the doping of different metals. It was found that the doping of metal cations with lower valence than that of the parent cation was effective to enhance the photocatalytic activity of H_2 evolution. This tendency was found to be applicable to various photocatalysts.

研究了一些D0型过渡金属氧气作为水裂解的光催化剂，以提高其性能。建立了通过通量辅助硝化方法获得氧硝酸盐颗粒的新途径。通过添加NaCl或Na_2CO_3作为通量，获得了高度结晶和单分散的氧气细胞。关于多组分 - 氧气硝酸盐的合成，添加通量会改善成分的混合状态，从而使不同金属的掺杂。发现具有低于父阳离子的金属阳离子的掺杂可有效增强H_2进化的光催化活性。发现这种趋势适用于各种光催化剂。

项目成果

Z-scheme overall water splitting on modified-TaON photocatalysts under visible light(λ<500nm)

可见光下改性TaON光催化剂的Z型整体水分解（λ<500nm）

• 发表时间: 2008
• 期刊: Chem. Lett 37
• 作者: M. Higashi;R. Abe;A. Ishikawa;T. Takata;B. Ohtani K. Domen
• 通讯作者: B. Ohtani K. Domen

Defect enginnering of photocatalyst by Doping of Aliovalent Metal Cations for Efficient Water Splitting

通过掺杂异价金属阳离子进行光催化剂的缺陷工程以实现高效水分解

• 发表时间: 2009
• 期刊: J.Phys.Chem.C 133
• 作者: T.Takata;K.Domen
• 通讯作者: K.Domen

Two step water splitting into H2 and O2 under visible light by ATaO2N(A=Ca, Sr, Ba)and WO3 with lO3-/l- shuttle redox mediator

ATaO2N(A=Ca,Sr,Ba)和WO3与lO3-/l-穿梭氧化还原介体在可见光下两步将水分解成H2和O2

• 发表时间: 2008
• 期刊: Chem. Phys. Lett 37
• 作者: M. Higashi;R. Abe;K. Teramura . T. Takata. B. Ohtani K. Domen
• 通讯作者: K. Teramura . T. Takata. B. Ohtani K. Domen

光触媒を用いた水分解による水素製造

利用光催化剂分解水制氢

• 发表时间: 2008
• 作者: 堂免一成;高田剛
• 通讯作者: 高田剛

Photocatalytic activity of Ta3N5 prepared by flux method

助熔剂法制备Ta3N5的光催化活性

• 发表时间: 2008
• 作者: Tsuyoshi Takata;Kazunari Domen
• 通讯作者: Kazunari Domen