NDLI: Porous P-doped graphitic carbon nitride nanosheets for synergistically enhanced visible-light photocatalytic H<sub>2</sub> production

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Porous P-doped graphitic carbon nitride nanosheets for synergistically enhanced visible-light photocatalytic H₂ production

Content Provider	Royal Society of Chemistry (RSC)
Author	Du, Xi-Wen Qiao, Shi Zhang Gao, Guoping Ran, Jingrun Ma, Tian Yi
Copyright Year	2015
Abstract	Novel porous P-doped graphitic carbon nitride (g-C3N4) nanosheets were for the first time fabricated by combining P doping and thermal exfoliation strategies. The as-prepared P-doped g-C3N4 nanosheets show a high visible-light photocatalytic H2-production activity of 1596 μmol h−1 g−1 and an apparent quantum efficiency of 3.56% at 420 nm, representing one of the most highly active metal-free g-C3N4 nanosheet photocatalysts. This outstanding photocatalytic performance originates from the P-doped conjugated system and novel macroporous nanosheet morphology. Particularly, the empty midgap states (−0.16 V vs. standard hydrogen electrode) created by P doping are for the first time found to greatly extend the light-responsive region up to 557 nm by density functional theory and experimental studies, whilst the novel macroporous structure promotes the mass-transfer process and enhances light harvesting. Our study not only demonstrates a facile, eco-friendly and scalable strategy to synthesize highly efficient porous g-C3N4 nanosheet photocatalysts, but also paves a new avenue for the rational design and synthesis of advanced photocatalysts by harnessing the strong synergistic effects through simultaneously tuning and optimizing the electronic, crystallographic, surface and textural structures.
Starting Page	3708
Ending Page	3717
Page Count	10
File Format	HTM / HTML PDF
ISSN	17545692
Volume Number	8
Issue Number	12
Journal	Energy & Environmental Science
DOI	10.1039/c5ee02650d
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Graphitic carbon nitride Nitride Dopant Quantum tunnelling Nanosheet Conjugated system Standard hydrogen electrode Density functional theory
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution Renewable Energy, Sustainability and the Environment Nuclear Energy and Engineering

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