A new oxynitride-based solid state Z-scheme photocatalytic system for efficient Cr(VI) reduction and water oxidation

被引：38
|
作者：
Zhou, Yansong [1 ]
Chen, Gang [1 ]
Yu, Yaoguang [1 ]
Zhao, Lichen [1 ]
Sun, Jingxue [1 ]
He, Fang [1 ]
Dong, Hongjun [1 ]
机构：
[1] Harbin Inst Technol, Dept Chem, Harbin 150001, Peoples R China
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2016年 / 183卷
关键词：
Oxynitride semiconductors; Photocatalysis; Solid-state; Z-scheme; Energy conversion; VISIBLE-LIGHT IRRADIATION; HYDROGEN EVOLUTION PHOTOCATALYST; COMPOSITE PHOTOCATALYSTS; OXYGEN-EVOLUTION; TAON PHOTOANODE; PERFORMANCE; SEMICONDUCTOR; DRIVEN; MECHANISM; FABRICATION;
D O I：
10.1016/j.apcatb.2015.10.040
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：
Achieving ideal photocatalytic systems by mimicking Z-scheme mechanism in natural photosynthesis results in highly efficient artificial photosynthesis. A new oxynitride-based solid state Z-scheme photocatalytic system containing (GaxZn(1-x))(NxO(1-x)) and Nb3.49N4.56O0.44 was constructed. Nb-3.49 N4.56O0.44/(GaxZn(1-x))(NxO(1-x))(6.0) exhibits the highest rate for complete reduction of Cr(VI) within 30 min under simulated sunlight irradiation as well as extremely high apparent quantum efficiency of 68% at 350 nm 24.4% at 420 nm for photocatalytic water oxidation: A similar solid state Z-scheme photocatalytic system was also obtained when. compositing Nb3.49N4.56O0.44 with TaON. It's expected that Nb3.49N4.56O0.44 can also be composed with other oxynitride semiconductor to construct more oxynitride-based solid state Z-scheme photocatalytic systems. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：176 / 184
页数：9
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