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型过渡金属氮氧化物作为光催化剂用于水裂解，以提高其性能。建立了一种助熔剂辅助氮化法制备氮氧化物颗粒的新方法。以NaCl或Na_2CO_3为助熔剂，得到了结晶度高、分散性好的氮氧化物微粒。对于多组分氮氧化物的合成，助熔剂的加入改善了组分的混合状态，使得不同金属的掺杂成为可能。结果表明，低价金属阳离子的掺杂能有效地提高光催化剂的析氢活性。发现这种趋势适用于各种光催化剂。

项目成果

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

Defect Engineering of Photocatalysts by Doping of Aliovalent Metal Cations for Efficient Water Splitting

• DOI: 10.1021/jp908621e
• 发表时间: 2009-11-12
• 期刊: JOURNAL OF PHYSICAL CHEMISTRY C
• 影响因子: 3.7
• 作者: Takata, Tsuyoshi;Domen, Kazunari
• 通讯作者: Domen, Kazunari

Photocatalytic Overall Water Splitting under Visible Light Using ATaO2N (A = Ca, Sr, Ba) and WO3 in a IO3-/I- Shuttle Redox Mediated System

• DOI: 10.1021/cm803145n
• 发表时间: 2009-04-28
• 期刊: CHEMISTRY OF MATERIALS
• 影响因子: 8.6
• 作者: Higashi, Masanobu;Abe, Ryu;Domen, Kazunari
• 通讯作者: Domen, Kazunari

Highly-active Tantalum (V) nitride nanoparticles prepared from a mesoporous carbon nitride template for photocatalytic hydrogen evolution under visible light irradiation

• DOI: 10.1039/c0jm00341g
• 发表时间: 2010-05
• 期刊: Journal of Materials Chemistry
• 作者: L. Yuliati;Jae-Hun Yang;Xinchen Wang;K. Maeda;T. Takata;M. Antonietti;K. Domen

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