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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 AuthorZhang, Zhidong(zdzhang@imr.ac.cn)
2011-12-29
Source PublicationJOURNAL OF PHYSICAL CHEMISTRY C
ISSN1932-7447
Volume115Issue:51Pages:25241-25246
AbstractSingle-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 OrganizationNational Natural Science Foundation of China
DOI10.1021/jp208750n
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[50831006]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000298214800007
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:85[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/107176
Collection中国科学院金属研究所
Corresponding AuthorZhang, Zhidong
Affiliation1.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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