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

被引：14

作者：

Li, Bangquan ^{[1
,2
]}

Sun, Qian ^{[3
]}

Fan, Hongsheng ^{[1
,4
]}

Cheng, Ming ^{[4
]}

Shan, Aixian ^{[4
]}

Cui, Yimin ^{[1
]}

Wang, Rongming ^{[4
]}

机构：

[1] Beihang Univ, Dept Phys, Beijing 100191, Peoples R China

[2] Shanxi Datong Univ, Inst Solid State Phys, Datong 037009, Peoples R China

[3] Beijing Inst Space Mech & Elect, Beijing 100094, Peoples R China

[4] Univ Sci & Technol Beijing, Sch Math & Phys, Beijing Key Lab Magnetophotoelect Composite & Int, Beijing 100083, Peoples R China

来源：

NANOMATERIALS | 2018年 / 8卷 / 01期

基金：

中国国家自然科学基金;

关键词：

hematite; hollow structure; ferromagnetic behavior; supercapacitor; cycling stability; ALPHA-FE2O3; NANOPARTICLES; GROWTH-MECHANISM; ELECTRODE MATERIAL; METAL-OXIDES; EVOLUTION; NANORODS; NANOSTRUCTURES; CONVERSION; DESIGN;

D O I：

10.3390/nano8010041

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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.

引用

页数：12

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