Selective Synthesis and Photocatalytic Oxygen Evolution Activities of Tantalum/Nitrogen-Codoped Anatase, Brookite and Rutile Titanium Dioxide

被引：8
作者：
Nishioka, Shunta [1 ,2 ]
Kobayashi, Makoto [3 ]
Lu, Daling [4 ]
Kakihana, Masato [3 ]
Maeda, Kazuhiko [1 ]
机构：
[1] Tokyo Inst Technol, Sch Sci, Dept Chem, Meguro Ku, 2-12-1-NE-2 Ookayama, Tokyo 1528550, Japan
[2] Japan Soc Promot Sci, Chiyoda Ku, Kojimachi Business Ctr Bldg,5-3-1 Kojimachi, Tokyo 1020083, Japan
[3] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[4] Tokyo Inst Technol, Tech Dept, Suzukakedai Mat Anal Div, Midori Ku, 4259 Nagatsuta Cho, Yokohama, Kanagawa 2268503, Japan
来源：
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2019年 / 92卷 / 06期
关键词：
Heterogeneous photocatalysis; Water splitting; Oxynitrides; VISIBLE-LIGHT; ELECTRON MEDIATOR; TIO2; IRRADIATION; SRTIO3; OXIDE;
D O I：
10.1246/bcsj.20190037
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Tantalum/nitrogen codoped titanium dioxide (TiO2:Ta,N) having a rutile structure has recently been reported to be a good photocatalyst for visible-light water oxidation. In this work, three different polymorphs of TiO2:Ta,N (anatase, brookite and rutile) were synthesized by a hydrothermal method using water-soluble titanium/tantalum complexes as precursors, followed by thermal nitridation with dry ammonia gas. Effects of the physicochemical properties on photocatalytic activity for O-2 evolution from an aqueous silver nitrate solution under visible light (lambda > 400 nm) were investigated. Experimental results indicated that defect formation during the nitridation procedure was the dominant factor for photocatalytic activity. Anatase TiO2:Ta,N was the most active for O-2 evolution among the three polymorphs, and also served as an O-2 evolution photocatalyst in Z-scheme overall water splitting in combination with Rh-doped strontium titanate (SrTiO3:Rh) and an Fe3+/Fe2+ redox-shuttle mediator.
引用
收藏
页码：1032 / 1038
页数：7
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