Single-crystalline α-Fe2O3 oblique nanoparallelepipeds: High-yield synthesis, growth mechanism and structure enhanced gas-sensing properties

被引：115

作者：

Li, Xuelian ^{[1
]}

Wei, Wenjing ^{[1
]}

Wang, Shaozhen ^{[1
]}

Kuai, Long ^{[1
]}

Geng, Baoyou ^{[1
]}

机构：

[1] Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Funct Mol Solids, Anhui Lab Mol Based Mat, Wuhu 241000, Peoples R China

来源：

NANOSCALE | 2011年 / 3卷 / 02期

基金：

中国国家自然科学基金;

关键词：

LITHIUM-ION BATTERY; NANORODS; NANOTUBES; NANOSTRUCTURES; SHAPE; NANOWIRES; SENSOR; ROUTE;

D O I：

10.1039/c0nr00617c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this paper, single-crystalline alpha-Fe2O3 oblique nanoparallelepipeds are fabricated in high yield via a facile surfactant-free hydrothermal method, which involves oriented aggregation and Ostwald ripening. The obtained nanocrystals have exposed facets of {012}, {01-4} and {-210} with a rhombohedral alpha-Fe2O3 structure. The gas sensors based on the as-synthesized alpha-Fe2O3 nanostructures exhibit high sensitivity, short recovery time, and good reproducibility in ethanol and acetone. The superiority of the gas-sensing properties of the obtained nanostructures should be attributed to the surface structure of the nanocrystals. The as-prepared alpha-Fe2O3 nanocrystals are significant for exploiting their other applications in the future.

引用

页码：718 / 724

页数：7

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