Size-Dependent Magnetic, Photoabsorbing, and Photocatalytic Properties of Single-Crystalline Bi2Fe4O9 Semiconductor Nanocrystals

doi:10.1021/jp208750n

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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, Zhidong 2
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2011-12-29
卷号	115 期号:51 页码:25241-25246
ISSN号	1932-7447
DOI	10.1021/jp208750n
通讯作者	Zhang, Zhidong(zdzhang@imr.ac.cn)
英文摘要	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.
资助项目	National Natural Science Foundation of China[50831006]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000298214800007
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/107174]
专题	金属研究所_中国科学院金属研究所
通讯作者	Zhang, Zhidong
作者单位	1.Chinese Acad Sci, Int Ctr Mat Phys, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 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.