期刊
NANO RESEARCH
卷 12, 期 9, 页码 2385-2389出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-019-2357-0
关键词
graphitic carbon nitride; holey nanotubes; photocatalysis; visible-light response; hydrogen evolution
类别
资金
- National Key R&D Program of China [2018YFB1502002, 2017YFA0206904, 2017YFA0206900, 2016YFB0600901]
- National Natural Science Foundation of China [51825205, U1662118, 51772305, 51572270, 21871279, 21802154]
- Beijing Natural Science Foundation [2191002, 2182078, 2194089]
- Beijing Municipal Science and Technology Project [Z181100005118007]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
- Royal Society-Newton Advanced Fellowship [NA170422]
- International Partnership Program of Chinese Academy of Sciences [GJHZ1819]
- K. C. Wong Education Foundation
- Energy Education Trust of New Zealand
- University of Auckland Faculty Research Development Fund
A simple one-step thermal polymerization method was developed for synthesis of holey graphitic carbon nitride nanotubes, involving direct heating of mixtures of melamine and urea or melamine and cyanuric acid in specific mass ratios. Supramolecular structures formed between the precursor molecules guided nanotube formation. The porous and nanotubular structure of the nanotubes facilitated efficient charge carrier migration and separation, thereby enhancing photocatalytic H-2 production in 20 vol.% lactic acid under visible light irradiation. Nanotubes synthesized using melamine and urea in a 1:10 mass ratio (denoted herein as CN-MU nanotubes) exhibited a photocatalytic hydrogen production rate of 1,073.6 mu mol center dot h(-1)center dot g(-1) with Pt as the cocatalyst, a rate of 4.7 and 3.1 times higher than traditional Pt/g-C3N4 photocatalysts prepared from graphitic carbon nitride (g-C3N4) obtained by direct thermal polymerization of melamine or urea, respectively. On the basis of their outstanding performance for photocatalytic H-2 production, it is envisaged that the holey g-C3N4 nanotubes will find widespread uptake in other areas, including photocatalytic CO2 reduction, dye-sensitized solar cells and photoelectrochemical sensors.
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