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Wall‐Mesoporous Graphitic Carbon Nitride Nanotubes for Efficient Photocatalytic Hydrogen Evolution
Author(s) -
Bai Jiaxin,
Han Qing,
Cheng Zhihua,
Qu Liangti
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201801209
Subject(s) - photocatalysis , graphitic carbon nitride , materials science , mesoporous material , nanotechnology , nitride , carbon nitride , hydrogen production , visible spectrum , carbon nanotube , water splitting , chemical engineering , catalysis , chemistry , organic chemistry , optoelectronics , layer (electronics) , engineering
Graphitic carbon nitride (g‐CN) has attracted tremendous attention as visible‐light photocatalyst. However, for further improving the catalytic activity, multilevel and hierarchical nanostructuring of g‐CN is highly desirable to effectively expose active sites and facilitate separation and migration of photoexciteded charge carriers for largely enhanced photocatalytic behavior. Here, we prepare wall‐mesoporous graphitic carbon nitride nanotubes (g‐CNNTs) by in situ annealing of urea microrod arrays preformed in virtue of a vertical gradient freeze growth (VGFG) method. Benefiting from the distinctive structural features, the hierarchical g‐CNNTs exhibit a high photocatalytic H 2 production rate of 8789 μmol h −1 g −1 with an excellent apparent quantum yield of 6.3 % under visible‐light irradiation and long‐term cycling stability. This work provides a facile and eco‐friendly strategy to prepare a new type of carbon nitride‐based nanostructural material for photocatalysis and environmental remediation.