共 71 条
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
相关论文