Photocatalytic Hydrogen Production by Boron Modified TiO2/Carbon Nitride Heterojunctions

Boron‐doped anatase TiO2 particles were effectively coupled with carbon nitride (CN) forming nanocomposites. The materials were fully characterized by DR‐UV‐Vis, N2 adsorption‐desorption isotherms, XRD, Raman, FTIR, TGA, XPS, TEM, electron energy loss spectroscopy, photoluminescence, and electron pa...

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Bibliographic Details
Published in:ChemCatChem 2019-12, Vol.11 (24), p.6408-6416
Main Authors: Christoforidis, Konstantinos C., Montini, Tiziano, Fittipaldi, Maria, Jaén, Juan José Delgado, Fornasiero, Paolo
Format: Article
Language:English
Subjects:
Anatase
Boron
Boron nitride
Carbon
Carbon nitride
Catalysts
Charge efficiency
Electron energy loss spectroscopy
Energy dissipation
Ethanol
Heterojunctions
hydrogen
Hydrogen evolution
Hydrogen production
Nanocomposites
Nanoparticles
Photocatalysis
Photoluminescence
photoreforming
Spectrum analysis
TiO2
Titanium dioxide
X ray photoelectron spectroscopy
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Summary:Boron‐doped anatase TiO2 particles were effectively coupled with carbon nitride (CN) forming nanocomposites. The materials were fully characterized by DR‐UV‐Vis, N2 adsorption‐desorption isotherms, XRD, Raman, FTIR, TGA, XPS, TEM, electron energy loss spectroscopy, photoluminescence, and electron paramagnetic spectroscopy (EPR) spectroscopy. The developed heterojunctions were applied as photocatalysts for hydrogen (H2) evolution by the photoreforming process of ethanol under solar irradiation, using minimal amount of Pt nanoparticles (0.1 wt. %) as co‐catalyst. The effects of boron addition and CN content were evaluated and optimized nanocomposite presented 85 % increase in H2 evolution compared with the pure anatase TiO2 catalyst. The observed higher H2 evolution rates were ascribed to improvements in charge formation and separation efficiency due to the B‐dopant and the presence of CN. Photocatalysis: Photocatalytic hydrogen production is significantly improved via doping TiO2 with boron and coupling with carbon nitride.
ISSN:1867-3880
1867-3899
DOI:10.1002/cctc.201901703