Selective ethanol sensor based on α-Fe2O3 nanoparticles

被引：22
作者：
Shoorangiz, Mehdi [1 ]
Shariatifard, Leila [1 ]
Roshan, Hossein [2 ]
Mirzaei, Ali [3 ]
机构：
[1] Shiraz Univ, Dept Mat Sci & Engn, Shiraz, Iran
[2] Shiraz Univ, Dept Commun & Elect Engn, Shiraz 5115471348, Iran
[3] Shiraz Univ Technol, Dept Mat Sci & Engn, Shiraz, Iran
来源：
INORGANIC CHEMISTRY COMMUNICATIONS | 2021年 / 133卷
关键词：
Ethanol; Gas sensor; alpha-Fe2O3; Sensing mechanism; GAS SENSOR; SENSING PROPERTIES; FACILE SYNTHESIS; FE2O3; NANOSTRUCTURES; NANOCOMPOSITES; TEMPERATURE; GAMMA-FE2O3; TRANSITION; NANOWIRES;
D O I：
10.1016/j.inoche.2021.108961
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
In this study, p-type alpha-Fe2O3 nanoparticles (NPs) were synthesized through a Pechini sol-gel method for gas sensing studies. Different characterization methods such as X-ray diffraction, Fourier transform-infrared spectroscopy and scanning electron microscopy were used to study the crystallinity, functional groups and morphology of the synthesized powers, respectively. The gas sensor was fabricated and gas sensing properties of alpha-Fe2O3 NPs were evaluated towards ethanol vapor and other gases. The sensor showed a p-type semiconducting behavior, based on the resistance variations in the presence of reducing gases. At optimized sensing temperature of 150 degrees C, it showed a response [(Delta R/R-a) x 100] of 14.5% to 100 ppm ethanol gas, along with good selectivity to this gas. The sensing mechanism is discussed in details.
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页数：7
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