Research Article

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2019, 12(9): 2385–2389

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https://doi.org/10.1007/s12274-019-2357-0

Supramolecular precursor strategy for the synthesis of holey graphitic carbon nitride nanotubes with enhanced photocatalytic hydrogen evolution performance

Xiaoshuai Wang1,3,§, Chao Zhou1,§, Run Shi1, Qinqin Liu3, Geoffrey I. N. Waterhouse4, Lizhu Wu1, Chen-Ho Tung1, Tierui Zhang1,2 (*)

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1 Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
3 School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
4 School of Chemical Sciences, The University of Auckland, Auckland 1142, New Zealand
§ Xiaoshuai Wang and Chao Zhou contributed equally to this work.

Keywords: graphitic carbon nitride, holey nanotubes, photocatalysis, visible-light response, hydrogen evolution
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  • Abstract
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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 H2 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 µmol·h−1·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 H2 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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Supramolecular precursor strategy for the synthesis of holey graphitic carbon nitride nanotubes with enhanced photocatalytic hydrogen evolution performance. Nano Res. 2019, 12(9): 2385–2389 https://doi.org/10.1007/s12274-019-2357-0

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