Journal
NANO RESEARCH
Volume 11, Issue 6, Pages 3462-3468Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-018-2003-2
Keywords
graphitic carbon nitride (g-C3N4) microtubes; photocatalytic; water splitting; visible light response
Categories
Funding
- National Basic Research Program of China [2014CB239402]
- National Key Projects for Fundamental Research and Development of China [2016YFB0600901, 2017YFA0206904, 2017YFA0206900]
- National Natural Science Foundation of China [51772305, 51572270, U1662118, 21401207]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB17000000]
- Youth Innovation Promotion Association of the CAS
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A template-free hydrothermal-assisted thermal polymerization method has been developed for the large-scale synthesis of one-dimensional (1D) graphitic carbonnitride (g-C3N4) microtubes. The g-C3N4 microtubes were obtained by simple thermal polymerization of melamine-cyanuric acid complex microrods under N-2 atmosphere, which were synthesized by hydrothermal treatment of melamine solution at 180 A degrees C for 24 h. The as-obtained g-C(3)N(4)microtubes exhibited a large surface area and a unique one-dimensional tubular structure, which provided abundant active sites for proton reduction and also facilitated the electron transfer processes. As such, the g-C3N4 microtubes showed enhanced photocatalytic H-2 productionactivity in lactic acid aqueous solutions under visible light irradiation (lambda ae 420 nm), which was similar to 3.1 times higher than that of bulk g-C3N4 prepared by direct thermal polymerization of the melamine precursor under the same calcination conditions.
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