Microwave Hydrothermal Synthesis, Structural Characterization, and Visible-Light Photocatalytic Activities of Single-Crystalline Bismuth Ferric Nanocrystals
| Autor: | Qiming Hang, Xinhua Zhu, Zhaosheng Li, Zhigang Zou, Ye Song, Nai-Ben Ming, Yun Yang, Peng Zhou, Zhibiao Xing, Zhiguo Liu, Jianmin Zhu, Tao Yu |
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| Rok vydání: | 2011 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element Bismuth chemistry.chemical_compound chemistry X-ray photoelectron spectroscopy Nanocrystal Chemical engineering Transmission electron microscopy Materials Chemistry Ceramics and Composites Rhodamine B Photocatalysis Hydrothermal synthesis Selected area diffraction |
| Zdroj: | Journal of the American Ceramic Society. 94:2688-2693 |
| ISSN: | 0002-7820 |
| Popis: | Spherical perovskite-type bismuth ferritic nanocrystals with diameters of 10–50 nm and hexagonal-shaped sillenite-type ones with sizes of 18–33 nm were synthesized at low temperatures by microwave hydrothermal process. Their structural, optical, and photocatalytic properties were investigated. The single-crystalline nature of the as-synthesized nanocrystals was confirmed by X-ray diffraction, selected area electron diffraction, and high-resolution transmission electron microscopy. X-ray photoelectron spectroscopy investigations show that Fe element exists as the Fe3+ valence state, as well as Bi element as Bi3+ in the as-prepared bismuth ferritic nanocrystals. The visible-light photocatalytic activities evaluated by the degradation of rhodamine B in aqueous solution show that the sillenite-type bismuth ferritic nanocrystals exhibit higher photocatalytic ability than the perovskite-type ones, which can be ascribed to their small mean particle size and the unique hexagonal-shape morphology, and also the structural characteristics of sillenite-type compound. The present results demonstrate that the hexagonal-shaped sillenite-type bismuth ferritic nanocrystals can be used as novel visible-light-responsive photocatalysts for degradation of organic compounds. |
| Databáze: | OpenAIRE |
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