量子点
分解水
材料科学
试剂
光催化
化学计量学
碳纤维
催化作用
辐照
光化学
纳米技术
复合材料
化学
物理化学
复合数
物理
核物理学
生物化学
作者
Xiuqin Wu,Jing‐Tai Zhao,Feng Guo,Liping Wang,Weilong Shi,Hui Huang,Yang Liu
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2016-01-01
卷期号:8 (39): 17314-17321
被引量:122
摘要
Carbon dot and BiVO4 quantum dot composites (CDs/BiVO4 QDs) show a significantly improved photocatalytic activity and high stability for overall water splitting. By using 5% CDs/BiVO4 QDs as photocatalysts, the H2 evolution of 0.92 μmol h−1, was achieved under solar light irradiation without any cocatalysts or sacrificial reagents, which is about 4 times that of BiVO4 QDs (0.21 μmol h−1). Note that, for the CD/BiVO4 QD catalyst, the produced H2 and O2 are approximately equal to the stoichiometric ratio (H2 : O2 = 1.80 : 1), while that of BiVO4 QDs is nonstoichiometric (about only 0.06 : 1). In addition, the present water splitting occurs via a two-electron pathway and CDs and BiVO4 QDs served as the reduction and oxidation reaction active sites, respectively.
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