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Enhanced Photocatalytic Hydrogen Evolution of Carbon Quantum Dot Modified 1D Protonated Nanorods of Graphitic Carbon Nitride
journal contribution
posted on 2018-09-05, 00:00 authored by Lingling Li, Xunjin Zhu1D
protonated graphitic carbon nitride (HCN) are prepared through
free-template chemical method and further modified with different
amount of carbon quantum dots (CQDs) to afford new hybrids denoted
as HCNC-x (x represents weight ratio
of CQDs) for photocatalytic hydrogen evolution. The immobilization
of CQDs onto HCN not only significantly improves the visible-light
harvesting, but also prolongs the lifetime of charge carriers upon
photoexcitation and suppresses the recombination of electron–hole
pairs because of the intimate interface formed between the two components
with opposite charges. As a result, the HCNC-0.50 show the highest
photocatalytic hydrogen evolution rate of 382 μmol h–1 g–1 under visible light irritation, which was
about 3-fold of pristine HCNC-0.0. Moreover, no decay of activity
is observed for the HCNC-x hybrids that is recycled
after 12 h photocatalytic reaction and then exposed to air for half
a year.
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12 h photocatalytic reactionHCNC -0.50 showweight ratiophotocatalytic hydrogen evolutioncarbon quantum dotsGraphitic Carbon Nitride 1 D protonated graphitic carbon nitrideHCNC -0.0.photocatalytic hydrogen evolution rateCQDfree-template chemical methodx hybridsEnhanced Photocatalytic Hydrogen EvolutionCarbon Quantum Dot Modified 1 D Protonated Nanorodslight irritationcharge carriersvisible-light harvesting
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