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Harvesting Solar Light with Crystalline Carbon Nitrides for Efficient Photocatalytic Hydrogen Evolution
Author(s) -
Bhunia Manas K.,
Yamauchi Kazuo,
Takanabe Kazuhiro
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201405161
Subject(s) - photocatalysis , dopant , carbon nitride , materials science , triazine , nitride , imide , ionic liquid , melamine , supramolecular chemistry , photochemistry , chemical engineering , nanotechnology , doping , chemistry , crystal structure , optoelectronics , organic chemistry , polymer chemistry , catalysis , composite material , layer (electronics) , engineering
Described herein is the photocatalytic hydrogen evolution using crystalline carbon nitrides (CNs) obtained by supramolecular aggregation followed by ionic melt polycondensation (IMP) using melamine and 2,4,6‐triaminopyrimidine as a dopant. The solid state NMR spectrum of 15 N‐enriched CN confirms the triazine as a building unit. Controlling the amount and arrangements of dopants in the CN structure can dramatically enhance the photocatalytic performance for H 2 evolution. The polytriazine imide (PTI) exhibits the apparent quantum efficiency (AQE) of 15 % at 400 nm. This method successfully enables a substantial amount of visible light to be harvested for H 2 evolution, and provides a promising route for the rational design of a variety of highly active crystalline CN photocatalysts.
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