Synthesis and gas sensing properties of α-Fe2O3@ZnO core-shell nanospindles

被引：104

作者：

Zhang, Jun ^{[1
]}

Liu, Xianghong

Wang, Liwei

Yang, Taili

Guo, Xianzhi

Wu, Shihua

Wang, Shurong

Zhang, Shoumin

机构：

[1] Nankai Univ, Dept Chem, TKL Metal & Mol Based Mat Chem, Tianjin 300071, Peoples R China

来源：

NANOTECHNOLOGY | 2011年 / 22卷 / 18期

基金：

中国国家自然科学基金;

关键词：

HYDROTHERMAL SYNTHESIS; FACILE SYNTHESIS; GENERAL-ROUTE; ARRAYS; NANOCOMPOSITES; NANOWIRES; NANOTUBES; MECHANISM; SENSOR;

D O I：

10.1088/0957-4484/22/18/185501

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

alpha-Fe2O3@ZnO core-shell nanospindles were synthesized via a two-step hydrothermal approach, and characterized by means of SEM/TEM/XRD/XPS. The ZnO shell coated on the nanospindles has a thickness of 10-15 nm. Considering that both alpha-Fe2O3 and ZnO are good sensing materials, we have investigated the gas sensing performances of the core-shell nanocomposite using ethanol as the main probe gas. It is interesting to find that the gas sensor properties of the core-shell nanospindles are significantly enhanced compared with pristine alpha-Fe2O3. The enhanced sensor properties are attributed to the unique core-shell nanostructure. The detailed sensing mechanism is discussed with respect to the energy band structure and the electron depletion theory. The core-shell nanostructure reported in this work provides a new path to fabricate highly sensitive materials for gas sensing applications.

引用

页数：7

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