| Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals | |
| Zhang, Qiang; Gong, Wenjie; Wang, Jiaheng; Ning, Xinkun; Wang, Zhenhua; Zhao, Xinguo; Ren, Weijun; Zhang, Zhidong1 | |
| Corresponding Author | Zhang, Zhidong(zdzhang@imr.ac.cn) |
| 2011-12-29 | |
| Source Publication | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| ISSN | 1932-7447 |
| Volume | 115Issue:51Pages:25241-25246 |
| Abstract | Single-crystalline Bi2Fe4O9 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 Bi2Fe4O9 semiconductor NCs increases from 1.91 to 2.04 eV, which results from quantum confinement effect. The Bi2Fe4O9 NCs exhibit excellent photocatalytic oxidation of methylene blue (MB) under visible light irradiation with the assistance of a small amount of H2O2. Interestingly, smaller NCs exhibit higher photocatalytic activities. The size-dependence of photocatalytic properties of the Bi2Fe4O9 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. |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1021/jp208750n |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[50831006] |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS Subject | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS ID | WOS:000298214800007 |
| Publisher | AMER CHEMICAL SOC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/107176 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, Zhidong |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, Qiang,Gong, Wenjie,Wang, Jiaheng,et al. Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2011,115(51):25241-25246. |
| APA | Zhang, Qiang.,Gong, Wenjie.,Wang, Jiaheng.,Ning, Xinkun.,Wang, Zhenhua.,...&Zhang, Zhidong.(2011).Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals.JOURNAL OF PHYSICAL CHEMISTRY C,115(51),25241-25246. |
| MLA | Zhang, Qiang,et al."Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals".JOURNAL OF PHYSICAL CHEMISTRY C 115.51(2011):25241-25246. |
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