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Issue 7, 2012
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Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts

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Abstract

Nanocrystalline porous N-doped ceria films have been prepared by combining sol–gel chemistry, evaporation-induced self-assembly (EISA), flash crystallization and treatment in NH3 gas between 550 and 700 °C at flow rates of 270 and 670 cm3 min−1. The maximum nitrogen uptake is 0.06 moles per Ce, observed for the sample treated at 600 °C and NH3 flow rate of 670 cm3 min−1. Nitrogen bonding to cerium is proved by XPS, through the observation of the characteristic Ce–N feature at ∼397 eV. Microstructural characterization shows that the mesostructure of the films is lost for treatment temperatures in ammonia higher than 550 °C but the porous fraction remains between 35 and 40% after ammonolysis for all the samples. The nitrided films show photocatalytic activity under visible light in the acetaldehyde decomposition, with the best results obtained for the films treated at 550 °C under NH3 flow rate of 670 cm3 min−1.

Graphical abstract: Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts

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Publication details

The article was received on 14 Oct 2011, accepted on 06 Dec 2011 and first published on 09 Jan 2012


Article type: Paper
DOI: 10.1039/C2JM15230D
Citation: J. Mater. Chem., 2012,22, 3220-3226

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    Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts

    A. B. Jorge, Y. Sakatani, C. Boissière, C. Laberty-Roberts, G. Sauthier, J. Fraxedas, C. Sanchez and A. Fuertes, J. Mater. Chem., 2012, 22, 3220
    DOI: 10.1039/C2JM15230D

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