Highly sensitive gallia-SnO2 nanocomposite sensors to CO and ethanol in presence of methane

被引:31
作者
Bagheri, Minoo [1 ]
Khodadadi, Abbas Ali [2 ]
Mahjoub, Ali Reza [1 ]
Mortazavi, Yadollah [3 ]
机构
[1] Tarbiat Modares Univ, Dept Chem, Tehran, Iran
[2] Univ Tehran, Sch Chem Engn, Catalysis & Nanostructured Mat Res Lab, Tehran, Iran
[3] Univ Tehran, Nanoelect Ctr Excellence, Tehran, Iran
关键词
Gallia; SnO2; Nanocomposite; Gas sensor; Selectivity; GAS SENSORS; SENSING CHARACTERISTICS; METAL-OXIDES; DOPED SNO2; THIN-FILMS; SELECTIVITY; OXYGEN; CONDUCTIVITY; EMISSION;
D O I
10.1016/j.snb.2013.06.069
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Responses of gallia-SnO2 nanocomposite sensors, containing 0-50 wt% Ga2O3 calcined at 500-850 degrees C, to CO, methane and ethanol are investigated. The gallia-SnO2 samples were prepared via a facile co-precipitation method using stannic chloride and gallium nitrate aqueous solutions without any template and characterized by XRD, EDX, TEM, PL and BET surface area techniques. The samples containing up to 25 wt% gallia and calcined at 500 degrees C indicate that only tetragonal rutile structure of SnO2 is formed. The Ga4SnO8 and beta-Ga2O3 phases are observed for the samples containing 50 wt% Ga2O3 and calcined at 850 and 1050 degrees C, respectively. The average particle sizes of the nanocomposites gradually decrease from 21.6 to 6.7 nm, as their gallia contents increase from 0 to 25 wt%. The highest responses of 315 and 119 are observed for 300 ppm CO and ethanol by the sensors containing 5 and 1 wt% Ga2O3, respectively. The sensors containing 25 wt% Ga2O3 calcined at 850 degrees C and 50 wt% gallia calcined at 500 and 850 degrees C are selective to CO and show negligible responses to ethanol and methane. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:45 / 52
页数:8
相关论文
共 42 条
  • [1] Highly sensitive and selective sensors to volatile organic compounds using MWCNTs/SnO2
    Ahmadnia-Feyzabad, Sadegh
    Khodadadi, Abbas Ali
    Vesali-Naseh, Masoud
    Mortazavi, Yadollah
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2012, 166 : 150 - 155
  • [2] Characterization and ellipsometric investigation of high-quality ZnO and ZnO(Ga2O3) thin alloys by reactive electron-beam co-evaporation technique
    Al Asmar, R.
    Atanas, J. -P.
    Zaatar, Y.
    Podlecki, J.
    Foucaran, A.
    [J]. MICROELECTRONICS JOURNAL, 2006, 37 (10) : 1080 - 1085
  • [3] Oxygen sensing at high temperatures using Ga2O3 films
    Baban, C
    Toyoda, Y
    Ogita, M
    [J]. THIN SOLID FILMS, 2005, 484 (1-2) : 369 - 373
  • [4] Enhanced H2S sensing characteristics of Pt doped SnO2 nanofibers sensors with micro heater
    Dong, Ki-Young
    Choi, Joong-Ki
    Hwang, In-Sung
    Lee, Jin-Woo
    Kang, Byung Hyun
    Ham, Dae-Jin
    Lee, Jong-Heun
    Ju, Byeong-Kwon
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2011, 157 (01): : 154 - 161
  • [5] Semiconductor properties of thin and thick film Ga2O3 ceramic layers
    Feltz, A
    Gamsjäger, E
    [J]. JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1998, 18 (14) : 2217 - 2226
  • [6] Selectivity in high-temperature operated semiconductor gas-sensors
    Fleischer, M
    Meixner, H
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 1998, 52 (1-2) : 179 - 187
  • [7] EFFECT OF THE SENSOR STRUCTURE ON THE STABILITY OF GA(2)O(3) SENSORS FOR REDUCING GASES
    FLEISCHER, M
    HOLLBAUER, L
    MEIXNER, H
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 1994, 18 (1-3) : 119 - 124
  • [8] Fast gas sensors based on metal oxides which are stable at high temperatures
    Fleischer, M
    Meixner, H
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 1997, 43 (1-3) : 1 - 10
  • [9] CO and ethanol dual selective sensor of Sm2O3-doped SnO2 nanoparticles synthesized by microwave-induced combustion
    Habibzadeh, Sajjad
    Khodadadi, Abbas Ali
    Mortazavi, Yadollah
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2010, 144 (01) : 131 - 138
  • [10] CeO2 doped ZnO flower-like nanostructure sensor selective to ethanol in presence of CO and CH4
    Hamedani, Naghmeh Faal
    Mahjoub, Ali Reza
    Khodadadi, Abbas Ali
    Mortazavi, Yadollah
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2012, 169 : 67 - 73