期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 11, 期 3, 页码 566-571出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ee03592f
关键词
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资金
- National Natural Science Foundation of China [21422104]
- Natural Science Foundation of Tianjin City [17JCJQJC44700, 16JCZDJC30600]
- Volkswagen Foundation (Freigeist Fellowship) [89592]
Polymeric carbon nitride (PCN) is a promising earth-abundant photocatalyst for solar energy conversion. However, the photocatalytic activities of PCN-based materials remain moderate because of their poor dispersion in water and their fast electron-hole recombination. Here, a facile two-step continuous thermal treatment strategy is presented to endow the bulk PCN nanosheets with an atomically-thin structure, strong hydrophilicity and Lewis basicity to dramatically enhance the photocatalytic hydrogen (H-2) generation performance. The formation of the oxygen-containing and amino groups in the atomically-thin PCN sheets improves the charge separation and provides rich active sites for the surface reaction. Such synergistic effects lead to a superior visible-light-driven photocatalytic activity and its H-2 evolution rate (1233.5 mu mol h(-1)g(-1)) is more than 11 times higher than the bulk PCN using Ni as a cocatalyst. Additionally, the H-2 evolution rate can reach 20948.6 mu mol h(-1)g(-1) using Pt as a cocatalyst under AM1.5G solar irradiation.
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