Synergistic effect of N- and F-codoping on the structure and photocatalytic performance of TiO2 |
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Authors: | Jiemei Yu Zongming Liu Haitao Zhang Taizhong Huang Jitian Han Yihe Zhang Daohuang Chong |
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Institution: | 1 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;2 School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China;3 School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China |
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Abstract: | Three types of TiO2 nanostructures were synthesized via a facile hydrolysis method at 195 °C. Effects of the preparation method and doping with N and F on the crystal structure and photocatalytic performance of TiO2 were investigated. The nanomaterials were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller porosimetry, ultraviolet–visible diffuse reflectance spectroscopy and fluorescent emission spectra. Their photo-catalytic activity was examined by the photodegradation of methylene blue in aqueous solution under both ultra-violet and visible light irradiation. The results show that nitrogen and fluorine co-doped anatase TiO2 had the characteristics of a smaller crystalline size, broader light absorption spectrum and lower charge recombination than pure TiO2. Most importantly, more efficient photocatalytic activity under both ultra-violet and visible light was observed. The obtained N–F-TiO2 nanomaterial shows considerable potential for water treatment under sunlight irradiation. |
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Keywords: | TiO2 hydrolysis Anion doping Photocatalyst Nanoparticle |
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