Studies into the Yb-doping effects on photoelectrochemical properties of WO3 photocatalysts

被引：6
作者：
Liew, Siao Li [1 ]
Subramanian, Gomathy Sandhya [1 ]
Chua, Chin Seng [1 ]
Luo, He-Kuan [1 ]
机构：
[1] Agcy Sci Technol & Res, Inst Mat Res & Engn, 2 Fusionopolis Way,08-03 Innovis, Singapore 138634, Singapore
来源：
RSC ADVANCES | 2016年 / 6卷 / 23期
关键词：
VISIBLE-LIGHT; TUNGSTEN TRIOXIDE; WATER OXIDATION; THIN-FILMS; DRIVEN; PERFORMANCE; PHOTOANODE; DYNAMICS;
D O I：
10.1039/c5ra26254b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Yb-doped WO3 photocatalysts were prepared by co-sputtering Yb and WO3 on FTO glass and then sintering at elevated temperatures in air. At sintering temperatures between 450 and 550 degrees C, the photocurrent densities of Yb-doped WO3 photocatalysts were higher and more stable than those of pristine WO3 photocatalysts. The Yb-doping effects on the photoelectrochemical properties were investigated using Raman, transient absorption and electrochemical impedance spectroscopies. Compared to pristine WO3 photocatalysts, Yb-doped photocatalysts sintered at up to 550 degrees C consist of sub-stoichiometric WO3-x due to the substitution of W6+ cations with Yb3+ dopants, displaying shorter electron-hole recombination times and higher levels of donor densities.
引用
收藏
页码：19452 / 19458
页数：7
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