Phosphorus-Doped Carbon Nitride Tubes with a Layered Micro-nanostructure for Enhanced Visible-Light Photocatalytic Hydrogen Evolution.
Angew Chem Int Ed Engl
; 55(5): 1830-4, 2016 Jan 26.
Article
en En
| MEDLINE
| ID: mdl-26692105
ABSTRACT
Phosphorus-doped hexagonal tubular carbon nitride (P-TCN) with the layered stacking structure was obtained from a hexagonal rod-like single crystal supramolecular precursor (monoclinic, C2/m). The production process of P-TCN involves two steps:
1)â the precursor was prepared by self-assembly of melamine with cyanuric acid from inâ situ hydrolysis of melamine under phosphorous acid-assisted hydrothermal conditions; 2)â the pyrolysis was initiated at the center of precursor under heating, thus giving the hexagonal P-TCN. The tubular structure favors the enhancement of light scattering and active sites. Meanwhile, the introduction of phosphorus leads to a narrow band gap and increased electric conductivity. Thus, the P-TCN exhibited a high hydrogen evolution rate of 67â µmol h(-1) (0.1â g catalyst, λ >420â nm) in the presence of sacrificial agents, and an apparent quantum efficiency of 5.68 % at 420â nm, which is better than most of bulk g-C3 N4 reported.
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01-internacional
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MEDLINE
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En
Revista:
Angew Chem Int Ed Engl
Año:
2016
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Article