Influence of nanoparticle size on ethanol gas sensing performance of mesoporous α-Fe2O3 hollow spheres

被引：30

作者：

Jin, Changqing ^{[1
]}

Ge, Chenghai ^{[1
]}

Xu, Gang ^{[1
]}

Peterson, George ^{[2
]}

Jian, Zengyun ^{[1
]}

Wei, Yongxing ^{[1
]}

Zhu, Kexin ^{[1
]}

机构：

[1] Xian Technol Univ, Sch Mat & Chem Engn, Xian 710021, Shaanxi, Peoples R China

[2] Univ Nebraska Lincoln, Dept Mech & Mat Engn, W342NH, Lincoln, NE 68588 USA

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2017年 / 224卷

基金：

中国国家自然科学基金;

关键词：

Fe2O3; Hollow spheres; Template; Sensors; Mesoporous; Crystal growth; HYDROTHERMAL SYNTHESIS; NANOSTRUCTURES; HEMATITE; SENSORS; NANOTUBES; MECHANISM;

D O I：

10.1016/j.mseb.2017.07.015

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Mesoporous alpha-Fe2O3 hollow spheres were synthesized through a heterogeneous nucleation method which incorporates a template for carbon-sphere nucleation. The grain size and grain size distribution of nanoparticles that assemble in hollow spheres could be controlled by the precursor solution concentration of Fe3+. The sensitivity of the samples to ethanol gas was investigated. The results indicated that the gas sensing performance is a function of grain size and grain size distribution, which is related to the concentration of Fe3+. The device sensitivity first increases, then decreases according to grain size. It was found that an average grain size of 15.9 +/- 1.4 nm has the highest sensitivity to ethanol gas.

引用

页码：158 / 162

页数：5

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