Carbon quantum dots as a visible light sensitizer to significantly increase the solar water splitting performance of bismuth vanadate photoanodes

被引：320
|
作者：
Ye, Kai-Hang [1 ,3 ]
Wang, Zilong [2 ,3 ]
Gu, Jiuwang [2 ]
Xiao, Shuang [3 ]
Yuan, Yufei [2 ]
Zhu, Yi [1 ]
Zhang, Yuanming [1 ]
Mai, Wenjie [1 ,2 ,4 ]
Yang, Shihe [3 ]
机构：
[1] Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China
[2] Jinan Univ, Guangzhou Key Lab Vacuum Coating Technol & New En, Siyuan Lab, Dept Phys, Guangzhou 510632, Guangdong, Peoples R China
[3] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China
[4] Jinan Univ, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China
来源：
ENERGY & ENVIRONMENTAL SCIENCE | 2017年 / 10卷 / 03期
基金：
中国国家自然科学基金;
关键词：
PHOTOELECTROCHEMICAL PERFORMANCE; PHOTOCATALYTIC PERFORMANCE; CO-PI; ENHANCEMENT; CELLS; BIVO4; NANOSTRUCTURES; NANOWIRES; CATALYST; ARRAYS;
D O I：
10.1039/c6ee03442j
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Here, we demonstrate that carbon quantum dots (CQDs), as a low cost, chemically stable, and environmentally friendly photosensitizer, can dramatically broaden the light absorption range to the entire visible range. Consequently, the NiOOH/FeOOH/CQD/BiVO4 (NFCB) photoanode has achieved a remarkable photocurrent density of 5.99 mA cm(-2) at 1.23 V vs. RHE under AM 1.5G in KH2PO4 aqueous solution without a hole scavenger (pH = 7) and a record high applied bias photon-to-current efficiency of 2.29% at 0.6 V vs. RHE for BiVO4-based photoanodes. This novel NFCB photoanode could operate stably for 10 h with a Faraday efficiency of similar to 95%, demonstrating the great potential of using CQDs for solar water splitting.
引用
收藏
页码：772 / 779
页数：8
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