Supercritical CO2-assisted deposition of NiO on (101)-anatase-TiO2 for efficient facet engineered photocatalysts
| Autor: | Shun Kashiwaya, Thierry Toupance, Wolfram Jaegermann, Andreas Klein, Céline Olivier, Cyril Aymonier, Jérôme Majimel |
|---|---|
| Přispěvatelé: | Fachbereich Material und Geowissenschaften, Technische Universität Darmstadt (TU Darmstadt), Institut des Sciences Moléculaires (ISM), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), This work was performed within the framework of the EMMI (European Multifunctional Material Institute) and was partially funded by the 'Université Franco-allemande' (German-French Doctoral College in Functional Materials) and the European Commission (S. K. Fellowship, Erasmus Mundus IDS-FunMat). |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Anatase
Nanocomposite Chemistry Non-blocking I/O Nanoparticle 02 engineering and technology General Chemistry [CHIM.MATE]Chemical Sciences/Material chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis Supercritical fluid 0104 chemical sciences chemistry.chemical_compound Chemical engineering X-ray photoelectron spectroscopy Materials Chemistry Photocatalysis Methyl orange 0210 nano-technology |
| Zdroj: | New Journal of Chemistry New Journal of Chemistry, Royal Society of Chemistry, 2018, 42 (23), pp.18649-18658. ⟨10.1039/C8NJ04292F⟩ |
| ISSN: | 1144-0546 1369-9261 |
| Popis: | International audience; NiO/(101)-anatase-TiO2 heterostructure nanoparticles were synthesized by depositing NiO onto the (101) facet of anatase crystals via the supercritical fluid chemical deposition (SFCD) route. Thorough characterization experiments performed by various techniques (XRD, UV-Vis DRS, N2 sorption, HR-TEM, EDX, and XPS) indicate that the SFCD method allowed a good dispersion of NiO onto the TiO2 nanoparticles for NiO amounts below 2 wt%. Compared to pure TiO2, the 0.1–1 wt% NiO–TiO2 nanocomposites showed enhanced photocatalytic properties for methylene blue (MB) and methyl orange (MO) decomposition under UV light irradiation, the 0.25 wt% NiO–TiO2 system leading to the highest efficiencies. The photocatalytic properties were then rationalized in terms of the acidic properties and electronic structures of the NiO–TiO2 nanocomposites. This higher photocatalytic activity was mainly related to the heterocontact at the interface of the NiO–TiO2 crystallites and to the enhanced reaction rates at the NiOx surface. |
| Databáze: | OpenAIRE |
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