Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 279, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119401
Keywords
g-C(3)N(4)manotubes; Benzene-ring; Self-assembled; Photocatalytic H(2)evolution
Funding
- Natural Science Foundation of Guangdong Province [2019A1515010470]
- National Key Research and Development Plan [2016YFA0203200]
- Science and Technology Program of Guangzhou, China [202002030116]
- Graduate Innovative Research Grant Program of Guangzhou University [2019GDJC-M11]
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An innovative benzene-ring grafted g-C3N4 nanotubes (AHCN) were prepared by thermal-polymerization of the self-assembled supramolecular composed of melamine (MA) and phloroglucinol (PG). MA is molecular self-assembly with PG to form nanorod-like supramolecular intermediate (N-MA-PG) in the hydrothermal process. Consequently, the PG in N-MA-PG acts as in-situ benzene-ring-doping source and shape-preserving-agent in the thermal polymerization conversion of N-MA-PG to AHCN. Benefited from the synergistic effect of nanotubular structure and benzene-ring grafting, AHCN shows stronger visible-light absorption, higher surface area, enhanced charge's separation efficiency, leading to an excellent photocatalytic H-2 evolution rate of 2780 mu mol h(-1) g(-1) under visible light irradiation, which is obviously superior to that of pristine g-C3N4 (187 mu mol h(-1) g(-1)), g-C3N4 nanotubes (512 mu mol h(-1) g(-1)) and benzene-ring grafted g-C3N4 (666 mu mol h(-1) g(-1)). The apparent quantum efficiency of AHCN is achieved at 6.21 % at lambda = 420 nm. This work proposes a route to develop high-photocatalytic activity g-C3N4 through nanostructure controlling and molecular doping simultaneously.
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