Improvement of photocatalytic activity of tantalum nitride by ammonothermal treatment at high pressure

被引：14

作者：

Kishida, Kazuhisa ^{[1
]}

Watanabe, Tomoaki ^{[1
]}

机构：

[1] Meiji Univ, Sch Sci & Technol, Dept Appl Chem, Tama Ku, Kawasaki, Kanagawa 2148571, Japan

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2012年 / 191卷

基金：

日本学术振兴会;

关键词：

Photocatalyst; Water splitting; Ta3N5; Nitride; High pressure; Ammonothermal; TITANIUM(IV) OXIDE PHOTOCATALYST; VISIBLE-LIGHT-DRIVEN; TERNARY NITRIDES; OXYNITRIDE; EVOLUTION; HYDROGEN; ENHANCEMENT; CALCINATION; PARTICLES; TINXOYFZ;

D O I：

10.1016/j.jssc.2012.02.060

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Tantalum nitride (Ta3N5) was treated under ammonothermal conditions with the ammonia pressure of 10 to 100 MPa at 823 K for 24 h to enhance the photocatalytic activity for hydrogen evolution from aqueous methanol solution under visible light irradiation. The rates of hydrogen evolution for all treated Ta3N5 were faster than those for untreated Ta3N5. Treated Ta3N5 showed higher enhanced activity for hydrogen evolution when treated with high-pressure ammonia at more than 50 MPa. The photocatalytic activity for hydrogen evolution of treated Ta3N5, related to the amount of defects, is due to reduced tantalum species. The enhancement in the activity is brought about by a decrease in surface defects, which contributes to improved electron transfer from the surface of Ta3N5 to the loaded Pt co-catalyst. (C) 2012 Elsevier Inc. All rights reserved.

引用

页码：15 / 18

页数：4

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