Effects of NH 4 F quantity on N-doping level, photodegradation and photocatalytic H 2 production activities of N-doped TiO 2 nanotube array films
| Autor: | Lianjie Zhu, Yan Wang, Hanjie Xie, Ningning Ba, Fubo Gao |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Photoluminescence Absorption spectroscopy Mechanical Engineering Inorganic chemistry 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Mechanics of Materials Photocatalysis Rhodamine B General Materials Science 0210 nano-technology Photodegradation Photocatalytic water splitting |
| Zdroj: | Materials Research Bulletin. 86:268-276 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2016.10.031 |
| Popis: | Series of N-doped TiO 2 nanotube array (NTA) films with various N-doping levels and tube lengths were prepared by a facile one-step anodization method, simply changing NH 4 F quantity in electrolyte. The crystal structures, morphologies and compositions of the samples were analyzed by XRD, SEM, TEM and X-ray photoelectron spectra (XPS). The optical properties were investigated by means of UV–vis absorption spectra and photoluminescence (PL) spectra. Their photocatalytic activities were assessed by photodegradation of rhodamine B (RhB) solution and photocatalytic water splitting to generate hydrogen, respectively. The photocatalytic reaction mechanism was investigated and discussed. The results show that NH 4 F quantity greatly influences the N-doping level and tube length of the TiO 2 NTA, which subsequently affects the optical properties and photocatalytic activities. The photodegradation and photocatalytic H 2 production activities of the N-doped TiO 2 NTAs can be simply regulated by tuning NH 4 F quantity in electrolyte during preparation. |
| Databáze: | OpenAIRE |
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