Nanocrystalline N-doped ceria porous thin films as efficient visible-active photocatalysts
| Autor: | Guillaume Sauthier, Yoshiaki Sakatani, A. Belen Jorge, Amparo Fuertes, Christel Laberty-Roberts, Cédric Boissière, Clément Sanchez, Jordi Fraxedas |
|---|---|
| Přispěvatelé: | Institut de Ciència de Materials de Barcelona (ICMAB), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Matériaux Hybrides et Nanomatériaux (MHN), Laboratoire de Chimie de la Matière Condensée de Paris (LCMCP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Collège de France (CdF (institution))-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Chaire Chimie des matériaux hybrides, Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Ministerio de Ciencia e Innovacion, Spain [MAT2008-04587] |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element [CHIM.MATE]Chemical Sciences/Material chemistry 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nanocrystalline material 0104 chemical sciences law.invention Cerium X-ray photoelectron spectroscopy chemistry Chemical engineering law Materials Chemistry Photocatalysis Crystallization 0210 nano-technology Porosity Nitriding Visible spectrum |
| Zdroj: | Journal of Materials Chemistry Journal of Materials Chemistry, Royal Society of Chemistry, 2012, 22 (7), pp.3220-3226. ⟨10.1039/c2jm15230d⟩ Digital.CSIC. Repositorio Institucional del CSIC instname Journal of Materials Chemistry, 2012, 22 (7), pp.3220-3226. ⟨10.1039/c2jm15230d⟩ |
| ISSN: | 1364-5501 0959-9428 |
| DOI: | 10.1039/c2jm15230d |
| Popis: | Nanocrystalline porous N-doped ceria films have been prepared by combining sol-gel chemistry, evaporation-induced self-assembly (EISA), flash crystallization and treatment in NH 3 gas between 550 and 700 °C at flow rates of 270 and 670 cm 3 min -1. The maximum nitrogen uptake is 0.06 moles per Ce, observed for the sample treated at 600 °C and NH 3 flow rate of 670 cm 3 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 NH 3 flow rate of 670 cm 3 min -1. © 2012 The Royal Society of Chemistry. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|