Hydrothermal Synthesis of Hematite Nanoparticles and Their Electrochemical Properties

被引：221

作者：

Zhu, Maiyong ^{[1
,2
]}

Wang, Ying ^{[1
]}

Meng, Dehai ^{[1
]}

Qin, Xingzhang ^{[1
]}

Diao, Guowang ^{[1
]}

机构：

[1] Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou 225002, Peoples R China

[2] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 30期

基金：

中国国家自然科学基金;

关键词：

LITHIUM-ION BATTERY; OXIDE NANOTUBE ARRAYS; IRON-OXIDE; ALPHA-FE2O3; NANORODS; MAGNETIC-PROPERTIES; GROWTH-MECHANISM; PHOTOCATALYTIC ACTIVITY; SELECTIVE SYNTHESIS; GAS SENSORS; LARGE-SCALE;

D O I：

10.1021/jp304041m

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A simple hydrotherrnal process for fabrication of hematite (alpha-Fe2O3) nanostructures with narrow size distribution was developed by using PVP as surfactant and NaAc as precipitation agent. The influence of experimental parameters including the concentration of the precursor, precipitation agent, stabilizing agent, and reaction time was systematically investigated to study the possible formation mechanism of alpha-Fe2O3. Finally, the electrochemical properties of the obtained hematite particles were studied using cyclic voltammetry and galvanostatic charge-discharge measurement by a three-electrode system. The results reveal that their specific capacitances are related to their sizes. By virtue of large surface area, the as-prepared hematite nanoparticles can present the highest capacitance (340.5 F.g(-1)) and an excellent long cycle life within the operated voltage window (-0.1 to 0.44 V), demonstrating that the as-prepared hematite nanoparticles can serve as one of the most excellent electrode materials for supercapacitors.

引用

页码：16276 / 16285

页数：10

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