Synthesis and Characterization of Sn/Ni Single Doped and Co–Doped Anatase/Rutile Mixed–Crystal Nanomaterials and Their Photocatalytic Performance under UV–Visible Light
Pure and Sn/Ni co–doped TiO<sub>2</sub> nanomaterials with anatase/rutile mixed crystal were prepared and characterized. The results show that pure TiO<sub>2</sub> is a mixed crystal structure composed of a large amount of anatase and a small amount of rutile. Sn doping promo...
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| Autores principales: | , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ddc0eab741dc468fb0745577c8e33ea8 |
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| Sumario: | Pure and Sn/Ni co–doped TiO<sub>2</sub> nanomaterials with anatase/rutile mixed crystal were prepared and characterized. The results show that pure TiO<sub>2</sub> is a mixed crystal structure composed of a large amount of anatase and a small amount of rutile. Sn doping promotes the phase transformation from anatase to rutile, while Ni doping inhibits the transformation. Both single doping and co–doping are beneficial to the inhibition of photoinduced charge recombination. Sn doping shows the best inhibitory effect on photogenerated charge recombination, and increases the utilization of visible light, displaying the highest photocatalytic activity. The decolorization degree of methylene blue (MB) by Sn–TiO<sub>2</sub> is 79.5% after 150 min. The reaction rate constant of Sn–TiO<sub>2</sub> is 0.01022 min<sup>−1</sup>, which is 5.6 times higher than pure TiO<sub>2</sub> (0.00181 min<sup>–1</sup>). |
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