Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2014, Vol.16 (1), p.1, Article 2143
2014
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Details
- Autor(en) / Beteiligte
- Titel
- Photocatalytic activity of nitrogen-doped TiO2-based nanowires: a photo-assisted Kelvin probe force microscopy study
- Ist Teil von
- Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology, 2014, Vol.16 (1), p.1, Article 2143
- Ort / Verlag
- Dordrecht: Springer Netherlands
- Erscheinungsjahr
- 2014
- Quelle
- Alma/SFX Local Collection
- Beschreibungen/Notizen
- In this study, a set of nitrogen-doped TiO 2 -based nanomaterials demonstrating photocatalytic activity was developed by combining the efforts of lattice doping and metal nanoparticle decoration and tested for photo-degradation of methylene blue dye by applying solar simulator irradiation. The surface potential shifts of these TiO 2 -based photocatalytic nanomaterials measured by Kelvin probe force microscope have been used to study the degree of electron generation of the photocatalysts after irradiation and were well correlated with the photocatalytic activity. The nitrogen-doped TiO 2 nanowires decorated with Pt nanoparticles can induce obvious electron accumulation and result in a large shift of surface potential. The analysis shows a clear correlation between the surface potential shift and the photodegradation activity. Furthermore, a thorough comparative photocatalytic activity study combined with X-ray photoelectron spectroscopy analysis of the materials—doped with nitrogen under various conditions—reveals that the photocatalytic efficiency of the catalysts is maintained even if the lattice doping is leached e.g., by thermal treatments after doping. Graphical Abstract By monitoring the surface potential shifts of various TiO 2 -based photocatalysts by photo-assisted Kelvin probe force microscopy, we obtain a useful tool for developing novel materials with high photocatalytic activity.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1388-0764, 1572-896XeISSN: 1572-896XDOI: 10.1007/s11051-013-2143-yTitel-ID: cdi_swepub_primary_oai_DiVA_org_umu_85288
- Format
- –
- Schlagworte
- Catalytic methods, Characterization and Evaluation of Materials, Chemistry and Materials Science, Condensed matter: structure, mechanical and thermal properties, Cross-disciplinary physics: materials science, rheology, Exact sciences and technology, Inorganic Chemistry, Irradiation, Kelvin probe force microscopy, Lasers, Materials Science, Methods of nanofabrication, Nanocrystalline materials, Nanoparticles, Nanoscale materials and structures: fabrication and characterization, Nanostructured catalyst, Nanotechnology, Nitrogen, Optical Devices, Optics, Photocatalyst, Photodegradation, Photonics, Physical Chemistry, Physics, Quantum wires, Radiation effects on specific materials, Research Paper, Solar simulators, Structure of solids and liquids, crystallography, Surface potential, TiO2, Titanium dioxide