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2-Propanol photodegradation over nitrogen-doped NaNbO3 powders under visible-light irradiation |
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| Authors: | Haifeng Shi Xiukai Li Zhigang Zou |
| Institution: | a Eco-materials and Renewable Energy Research Center (ERERC), Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, PR China b Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1, Sengen, Tsukuba, Ibaraki 305-0047, Japan c Materials Analysis Station, National Institute for Materials Science, (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan |
| Abstract: | Nitrogen-doped perovskite-type materials, yellowish NaNbO3−xNx powders, had been developed as visible-light-sensitive photocatalysts for decomposition of gaseous 2-propanol. The NaNbO3−xNx samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible (UV-vis) light diffuse reflectance spectroscopy, Brunauer-Emmett-Teller (BET) measurement, and scanning electron microscopy (SEM). The UV-vis spectra confirmed that the spectral response of the NaNbO3 powders could be tuned to visible-light region by nitrogen doping technique. The photocatalytic activities of NaNbO3−xNx samples were evaluated by decomposing gaseous 2-propanol into acetone and CO2 under visible-light irradiation (400 nm<λ<520 nm). The NaNbO3−xNx sample annealed at 833 K showed the highest visible-light photocatalytic activity among all the nitrogen-doped samples. The relationship between nitrogen doping amount and photocatalytic activity of NaNbO3−xNx samples was also investigated and discussed. |
| Keywords: | A Oxides C X-ray diffraction C Photoelectron spectroscopy D Electronic structure |
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