Room-temperature synthesis of nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) with highly enhanced photocatalytic activity and stability

Title
Room-temperature synthesis of nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) with highly enhanced photocatalytic activity and stability
Author
김종호
Keywords
VISIBLE-LIGHT PHOTOCATALYSIS; LARGE-SCALE SYNTHESIS; PHOTOELECTROCHEMICAL ACTIVITY; HYDROGEN EVOLUTION; HETEROGENEOUS PHOTOCATALYSIS; HYBRID NANOSTRUCTURES; CHEMICAL EXFOLIATION; POROUS G-C3N4; WATER; NANOSHEETS
Issue Date
2016-08
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v. 6, Article no. 31147
Abstract
A one-dimensional (1D) nanostructure having a porous network is an exceptional photocatalytic material to generate hydrogen (H-2) and decontaminate wastewater using solar energy. In this report, we synthesized nanoporous 1D microrods of graphitic carbon nitride (g-C3N4) via a facile and template-free chemical approach at room temperature. The use of concentrated acids induced etching and lift-off because of strong oxidation and protonation. Compared with the bulk g-C3N4, the porous 1D microrod structure showed five times higher photocatalytic degradation performance toward methylene blue dye (MB) under visible light irradiation. The photocatalytic H-2 evolution of the 1D nanostructure (34 mu mol g(-1)) was almost 26 times higher than that of the bulk g-C3N4 structure (1.26 mu mol g(-1)). Additionally, the photocurrent stability of this nanoporous 1D morphology over 24 h indicated remarkable photocorrosion resistance. The improved photocatalytic activities were attributed to prolonged carrier lifetime because of its quantum confinement effect, effective separation and transport of charge carriers, and increased number of active sites from interconnected nanopores throughout the microrods. The present 1D nanostructure would be highly suited for photocatalytic water purification as well as water splitting devices. Finally, this facile and room temperature strategy to fabricate the nanostructures is very cost-effective.
URI
https://www.nature.com/articles/srep31147http://hdl.handle.net/20.500.11754/68047
ISSN
2045-2322
DOI
10.1038/srep31147
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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