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Type: Journal article
Title: Porous P-doped graphitic carbon nitride nanosheets for synergistically enhanced visible-light photocatalytic H₂ production
Other Titles: Porous P-doped graphitic carbon nitride nanosheets for synergistically enhanced visible-light photocatalytic H(2) production
Author: Ran, J.
Ma, T.
Gao, G.
Du, X.
Qiao, S.
Citation: Energy and Environmental Science, 2015; 8(12):3708-3717
Publisher: Royal Society of Chemistry
Issue Date: 2015
ISSN: 1754-5692
Statement of
Jingrun Ran, Tian Yi Ma, Guoping Gao, Xi-Wen Du and Shi Zhang Qiao
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 micrometers ol 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.
Rights: This journal is © The Royal Society of Chemistry 2015
DOI: 10.1039/c5ee02650d
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