期刊
NANOMATERIALS
卷 8, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/nano8010041
关键词
hematite; hollow structure; ferromagnetic behavior; supercapacitor; cycling stability
类别
资金
- National Natural Science Foundation of China [11674023, 51331002, 51571006]
- Beijing Municipal Science and Technology Project [Z171100002217074]
- Science and Technology Project of Datong, Shanxi Province [2016022]
A series of alpha-Fe2O3 nanocrystals (NCs) with fascinating morphologies, such as hollow nanoolives, nanotubes, nanospindles, and nanoplates, were prepared through a simple template-free hydrothermal synthesis process. The results showed that the morphologies could be easily controlled by SO42- and H2PO4-. Physical property analysis showed that the alpha-Fe2O3 NCs exhibited shape- and size-dependent ferromagnetic and optical behaviors. The absorption band peak of the alpha-Fe2O3 NCs could be tuned from 320 to 610 nm. Furthermore, when applied as electrode material for supercapacitor, the hollow olive-structure exhibited the highest capacitance (285.9 F.g(-1)) and an excellent long-term cycling stability (93% after 3000 cycles), indicating that it could serve as a candidate electrode material for a supercapacitor.
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