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Composition dependence of the photophysical and photocatalytic properties of (AgNbO3)1−x(NaNbO3)x solid solutions |
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| Authors: | Guoqiang Li Tetsuya Kako Zhigang Zou Jinhua Ye |
| Affiliation: | a Photocatalytic Materials Center (PCMC), National Institute for Materials Science (NIMS), 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan b Department of Materials Science and Engineering, Nanjing University, Nanjing 210093, PR China c Ecomaterials and Renewable Energy Research Center (ERERC), Department of Physics, Nanjing University, Nanjing 210093, PR China |
| Abstract: | A series of orthorhombic photocatalysts (AgNbO3)1−x(NaNbO3)x solid solutions have been synthesized by a solid-state reaction method. The composition dependence of the photophysical and photocatalytic properties of synthesized solid solutions has been investigated systematically. With an increase in the content of NaNbO3, we found that (1) the lattice parameters decreased; (2) the Nb-O bond length in NbO6 octahedron reduced; (3) the band gap increased; and (4) the mean particle size decreased while the Brunauer-Emmett-Teller (BET) surface area increased. Photocatalytic activities of the (AgNbO3)1−x(NaNbO3)x (0?x?0.5) samples were evaluated from gaseous 2-propanol (IPA) decomposition into acetone and CO2 under visible-light irradiation emitted from blue-light-emitting diodes (BLEDs; light intensity: 0.01 mW cm−2). Among all the samples, the (AgNbO3)0.6(NaNbO3)0.4 sample showed the highest photocatalytic activity. |
| Keywords: | AgNbO3 NaNbO3 Solid solution Visible-light-sensitive photocatalyst |
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