Hydrothermal evolution, optical and electrochemical properties of hierarchical porous hematite nanoarchitectures

被引:24
作者
Zhu, Wancheng [1 ]
Cui, Xili [1 ]
Liu, Xiaofei [1 ]
Zhang, Liyun [1 ]
Huang, Jia-Qi [2 ]
Piao, Xianglan [2 ]
Zhang, Qiang [2 ]
机构
[1] Qufu Normal Univ, Dept Chem Engn, Qufu 273165, Shandong, Peoples R China
[2] Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China
来源
NANOSCALE RESEARCH LETTERS | 2013年 / 8卷
基金
中国国家自然科学基金;
关键词
Hematite; Hierarchical nanoarchitectures; Hydrothermal; Mesoporous; Lithium-ion batteries; LITHIUM ION BATTERY; ALPHA-FE2O3 NANOTUBE ARRAYS; FORCED HYDROLYSIS REACTION; MESOPOROUS HEMATITE; SELECTIVE SYNTHESIS; FORMATION MECHANISM; INTERNAL STRUCTURE; GROWTH-MECHANISM; ANODE MATERIAL; PARTICLES;
D O I
10.1186/1556-276X-8-2
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Hollow or porous hematite (alpha-Fe2O3) nanoarchitectures have emerged as promising crystals in the advanced materials research. In this contribution, hierarchical mesoporous alpha-Fe2O3 nanoarchitectures with a pod-like shape were synthesized via a room-temperature coprecipitation of FeCl3 and NaOH solutions, followed by a mild hydrothermal treatment (120A degrees C to 210A degrees C, 12.0 h). A formation mechanism based on the hydrothermal evolution was proposed. beta-FeOOH fibrils were assembled by the reaction-limited aggregation first, subsequent and in situ conversion led to compact pod-like alpha-Fe2O3 nanoarchitectures, and finally high-temperature, long-time hydrothermal treatment caused loose pod-like alpha-Fe2O3 nanoarchitectures via the Ostwald ripening. The as-synthesized alpha-Fe2O3 nanoarchitectures exhibit good absorbance within visible regions and also exhibit an improved performance for Li-ion storage with good rate performance, which can be attributed to the porous nature of Fe2O3 nanoarchitectures. This provides a facile, environmentally benign, and low-cost synthesis strategy for alpha-Fe2O3 crystal growth, indicating the as-prepared alpha-Fe2O3 nanoarchitectures as potential advanced functional materials for energy storage, gas sensors, photoelectrochemical water splitting, and water treatment.
引用
收藏
页码:1 / 14
页数:14
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