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

被引：336

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

页码：772 / 779

页数：8

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