Morphology-Controlled Synthesis of Hematite Nanocrystals and Their Optical, Magnetic and Electrochemical Performance

Author： Li Bangquan Sun Qian Fan Hongsheng Cheng Ming Shan Aixian Cui Yimin Wang Rongming

Publisher： MDPI

E-ISSN： 2079-4991|8|1|41-41

ISSN： 2079-4991

Source： Nanomaterials, Vol.8, Iss.1, 2018-01, pp. : 41-41

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Abstract

A series of α-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 α-Fe₂O₃ NCs exhibited shape- and size-dependent ferromagnetic and optical behaviors. The absorption band peak of the α-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.