Dye Modification Effects on TaON for Photocatalytic Hydrogen Production from Water

被引:20
|
作者
Hagiwara, Hidehisa [1 ,2 ]
Nagatomo, Masakiyo [1 ]
Seto, Chihiro [2 ]
Ida, Shintaro [1 ,2 ]
Ishiahara, Tatsumi [1 ,2 ]
机构
[1] Kyushu Univ, Dept Appl Chem, Nishi Ku, Fukuoka 8190395, Japan
[2] Int Inst Carbon Neutral Energy Res I2CNER, Nishi Ku, Fukuoka 8190395, Japan
来源
CATALYSTS | 2013年 / 3卷 / 03期
关键词
(oxy)nitride; porphyrin; photocatalyst; hydrogen; VISIBLE-LIGHT IRRADIATION; H-2; OXIDE; DEGRADATION; OXYNITRIDE; ATAO(3); DRIVEN; TA3N5; O-2; NA;
D O I
10.3390/catal3030614
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Modification effects of porphyrin dyes on the photocatalytic activity of tantalum (oxy)nitride (TaON) were investigated. The nitrogen content in tantalum (oxy)nitride was increased by increasing the heat treatment period. The optimized nitridation conditions were found to be calcination at 800 degrees C for 14 h under a NH3 gas flow (25 mL min(-1)). Among the porphyrin dyes examined, pentamethylene bis[4-(10,15,20-triphenylporphine-5-yl)benzoate]-dizinc (II) (Zn-TPPD) showed the most positive effect on the photocatalytic activity of TaON for H-2 production from Na2S aqueous solution. From the results of the photocatalytic reaction using various combinations of catalyst components, it was found that the modification dye and PtOx co-catalysts were necessary to achieving photocatalytic H-2 formation. In the PtOx/Zn-TPPD/TaON photocatalyst, the expected charge transfer mechanism was a two-step excitation of both TaON and Zn-TPPD, and the oxidation and reduction sites were TaON and PtOx co-catalyst, respectively. These results indicate that dye modification has the potential to improve the photocatalytic activity of various (oxy)nitride photocatalysts.
引用
收藏
页码:614 / 624
页数:11
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