Fe2O3/Co3O4 composite nanoparticle ethanol sensor

被引:64
作者
Mirzaei, Ali [1 ]
Park, Sunghoon [2 ]
Sun, Gun-Joo [2 ]
Kheel, Hyejoon [2 ]
Lee, Chongmu [2 ]
Lee, Sangmin [3 ]
机构
[1] Shiraz Univ, Dept Mat Sci & Engn, Shiraz, Iran
[2] Inha Univ, Dept Mat Sci & Engn, Inchon 22212, South Korea
[3] Inha Univ, Dept Elect Engn, Inchon 22212, South Korea
基金
新加坡国家研究基金会;
关键词
Gas sensor; Fe2O3; Co3O4; Nanoparticles; Nanocomposite; Mixed oxide; GAS-SENSING PROPERTIES; ALPHA-FE2O3; NANOTUBES; NANOCOMPOSITES; SNO2; FILMS; ZNO;
D O I
10.3938/jkps.69.373
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
In this study Fe2O3/Co3O4 nanocomposites were synthesized by using a simple hydrothermal route. The X-ray diffraction analysis results showed that the synthesized powders were pure and nanocrystalline in nature. Moreover, scanning electron microscopy revealed that Fe2O3 nanoparticles had spherical shapes while Co3O4 particles had a rod-like morphology. The ethanol sensing properties of Fe2O3/Co3O4 nanocomposites were examined and compared with those of pristine Fe2O3 nanoparticles. The gas sensing properties of Fe2O3/Co3O4 nanocomposites were shown to be superior to those of pristine Fe2O3 nanoparticles and for all concentrations of ethanol, the response of the nanocomposite sensor was shown to be higher than that of the pristine Fe2O3 nanoparticle sensor. In detail, the response of the Fe2O3/Co3O4 nanocomposite sensor to 200 ppm of ethanol at 300 au broken vertical bar C was about 3 times higher than that of pristine sensor. Also, in general, the response and recovery times of the Fe2O3/Co3O4 nanocomposite sensor were shorter than those of the pristine one. The improved sensing characteristics of the Fe2O3/Co3O4 sensor were attributed to a combination of several effects: the formation of a potential barrier at the Fe2O3-Co3O4 interface, the enhanced modulation of the conduction channel width accompanying the adsorption and desorption of ethanol gas, the catalytic activity of Co3O4 for the oxidation of ethanol, the stronger oxygen adsorption of p-type Co3O4, and the formation of preferential adsorption sites.
引用
收藏
页码:373 / 380
页数:8
相关论文
共 27 条
[1]   Performance of Cr-doped ZnO for acetone sensing [J].
Al-Hardan, N. H. ;
Abdullah, M. J. ;
Aziz, A. Abdul .
APPLIED SURFACE SCIENCE, 2013, 270 :480-485
[2]   Novel route for fabrication of nanostructured α-Fe2O3 gas sensor [J].
Bandgar, D. K. ;
Navale, S. T. ;
Khuspe, G. D. ;
Pawar, S. A. ;
Mulik, R. N. ;
Patil, V. B. .
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING, 2014, 17 :67-73
[3]   Conduction model of metal oxide gas sensors [J].
Barsan, N ;
Weimar, U .
JOURNAL OF ELECTROCERAMICS, 2001, 7 (03) :143-167
[4]   Nanocrystalline metal oxides for methane sensors: Role of noble metals [J].
Basu, S. ;
Basu, P.K. .
Journal of Sensors, 2009, 2009
[5]   Design of selective gas sensors using electrospun Pd-doped SnO2 hollow nanofibers [J].
Choi, Joong-Ki ;
Hwang, In-Sung ;
Kim, Sun-Jung ;
Park, Joon-Shik ;
Park, Soon-Sup ;
Jeong, Unyong ;
Kang, Yun Chan ;
Lee, Jong-Heun .
SENSORS AND ACTUATORS B-CHEMICAL, 2010, 150 (01) :191-199
[6]   Facile synthesis of pseudo-peanut shaped hematite iron oxide nano-particles and their promising ethanol and formaldehyde sensing characteristics [J].
Das, P. ;
Mondal, B. ;
Mukherjee, K. .
RSC ADVANCES, 2014, 4 (60) :31879-31886
[7]   Effects of oxygen and nitrogen addition on the optical properties of diamond-like carbon films [J].
Hwang, MS ;
Lee, C .
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2000, 75 (01) :24-28
[8]   The structure and photoluminescence properties of TiO2-coated ZnS nanowires [J].
Jun, J. ;
Jin, C. ;
Kim, H. ;
Kang, J. ;
Lee, C. .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2009, 96 (04) :813-818
[9]   Porous silicon as an agent for cancer thermotherapy based on near-infrared light irradiation [J].
Lee, Chongmu ;
Kim, Hohyeong ;
Hong, Chanseok ;
Kim, Mina ;
Hong, S. S. ;
Lee, D. H. ;
Lee, Wan In .
JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (40) :4790-4795
[10]   Enhancement of ZnO nucleation in ZnO epitaxy by atomic layer epitaxy [J].
Lim, J ;
Shin, K ;
Kim, H ;
Lee, C .
THIN SOLID FILMS, 2005, 475 (1-2) :256-261