Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi(2)Fe(4)O(9) Semiconductor Nanocrystals
文献类型：期刊论文
| 作者 | Q. Zhang ; W. J. Gong ; J. H. Wang ; X. K. Ning ; Z. H. Wang ; X. G. Zhao ; W. J. Ren ; Z. D. Zhang |
| 刊名 | Journal of Physical Chemistry C
 |
| 出版日期 | 2011 |
| 卷号 | 115期号:51页码:25241-25246 |
| 关键词 | sol-gel route quantum dots electronic-properties bifeo3 nanoparticles catalytic-properties ammonia oxidation bismuth ferrites exchange bias oxides transition |
| ISSN号 | 1932-7447 |
| 中文摘要 | Single-crystalline Bi(2)Fe(4)O(9) nanocrystals (NCs) of various sizes (from 78 to 14 nm), synthesized using the sol gel method, exhibit size-dependent magnetic properties, which can be attributed to the uncompensated spins on the surface of the antiferromagnetic NCs. These tunable magnetic properties have a profound significance and can be widely applied in spintronics. As the crystal size decreases, the energy gap of the Bi(2)Fe(4)O(9) semiconductor NCs increases from 1.91 to 2.04 eV, which results from quantum confinement effect. The Bi(2)Fe(4)O(9) NCs exhibit excellent photocatalytic oxidation of methylene blue (MB) under visible light irradiation with the assistance of a small amount of H(2)O(2). Interestingly, smaller NCs exhibit higher photocatalytic activities. The size-dependence of photocatalytic properties of the Bi(2)Fe(4)O(9) NCs was ascribed to the lower recombination rate of the photogenerated electron/hole pair within smaller NCs and higher specific surface areas, which allow for stronger photon absorption on the surface of smaller crystals. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30897]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Q. Zhang,W. J. Gong,J. H. Wang,et al. Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi(2)Fe(4)O(9) Semiconductor Nanocrystals[J]. Journal of Physical Chemistry C,2011,115(51):25241-25246. |
| APA | Q. Zhang.,W. J. Gong.,J. H. Wang.,X. K. Ning.,Z. H. Wang.,...&Z. D. Zhang.(2011).Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi(2)Fe(4)O(9) Semiconductor Nanocrystals.Journal of Physical Chemistry C,115(51),25241-25246. |
| MLA | Q. Zhang,et al."Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi(2)Fe(4)O(9) Semiconductor Nanocrystals".Journal of Physical Chemistry C 115.51(2011):25241-25246. |
入库方式： OAI收割
来源：金属研究所
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