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Porous micro-spheres of ZnO have been synthesized with Zn(NO3)26H2 O and urea as the raw materials and hexamine as a surfactant via a hydrothermal method. Structure, morphology, specific surface area, and pore size distribution of ZnO porous micro-sphere are characterized by X-ray diffraction, scanning electron microscopy, and micromeritics ASAP 2420 apparatus, respectively. Gas sensors are fabricated from the ZnO porous micro-spheres and their gas-sensing properties are measured. The gas sensitivity of sensor samples at different temperatures to acetone gas is examined. Results show that the sensitivity of ZnO porous micro-spheres sensors to 50 ppm acetone gas is 26.8 at 280 ℃, and the response and recovery durations are 4-10 seconds, respectively. Also, the sensor possesses an excelent selectivity for acetone.
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Keywords:
- hydrothermal method /
- zinc oxide /
- acetone /
- gas sensor
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[28] You L M, Huo L H, Cheng X L, Zhao H, Gao S 2013 Electronic Components and Materials 32 13 (in Chinese)[由丽梅, 霍丽华, 程晓丽, 赵辉, 高山 2013 电子元件与材料 32 13]
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[40] [41] Wang D W, Du S S, Zhou X, Wang B, Ma J, Sun P, Sun Y F, Lu G Y 2013 Cryst. Eng. Comm. 15 7438
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[1] Wang C, Wang F F, Fu X Q, Zhang E D, Xu Z 2011 Chin. Phys. B 20 050701
[2] Xu S, Yang Y, Wu H Y, Jiang C, Jing L Q, Shi K Y 2013 Journal of Inorganic Materials 28 584 (in Chinese)[徐爽, 杨颖, 邬洪源, 江超, 井立强, 史克英 2013 无机材料学报 28 584]
[3] [4] Wang X B, Cai W P, Liu S W, Wang G Z, Wu Z K, Zhao H J 2013 Colloids and Surfaces A: Physicochem. Eng. Aspects 422 199
[5] [6] [7] Zhao X W, Gao X Y, Chen X M, Chen C, Zhao M K 2013 Chin. Phys. B 22 024202
[8] Wei Y L, Huang Y F, Wu J H, Wang M, Guo C S, Dong Q, Yin S, Sato Tsugio 2013 Journal of Hazardous Materials 248249 202
[9] [10] [11] Chen X M, Wang X X, Gao X Y, Zhao X W, Liu H T, Zhang S 2013 Acta Phys. Sin. 62 056104 (in Chinese)[2013 62 056104]
[12] [13] Zhang H M, Xu C, Sheng P K, Chen Y J, Yu L, Li Q H 2013 Sensors and Actuators B 181 99
[14] Lv Y Z, Wang L F, Liao X X, Guo L, Li C R 2011 Journal of the Chinese Ceramic Society 39 1145
[15] [16] [17] Ibupoto Z H, Jamal N, Khun K, Liu X, Willander M 2013 Sensors and Actuators B 182 104
[18] Zeng Y, Lou Z, Wang L L, Zou B, Zhang T, Zheng W T, Zou G T 2011 Sensors and Actuators B 156 395
[19] [20] Wang H T, Wu T 2011 J. Mater. Chem. 21 15095
[21] [22] [23] Sun Y, N George Ndifor-Angwafor, D Jason Riley, Michael N R Ashfold 2006 Chemical Physics Letters 431 352
[24] [25] Yu X, Song F, Zhai B, Zheng C T, Wang Y D 2013 Physica E 52 92
[26] [27] Li X B, Ma S Y, Li F M, Chen Y, Zhang Q Q, Yang X H, Wang C Y 2013 J. Materials Letters 100 119
[28] You L M, Huo L H, Cheng X L, Zhao H, Gao S 2013 Electronic Components and Materials 32 13 (in Chinese)[由丽梅, 霍丽华, 程晓丽, 赵辉, 高山 2013 电子元件与材料 32 13]
[29] [30] [31] Lim S K, Hwang S H, Chang D, Kim S 2010 Sensors and Actuators B 149 28
[32] [33] Zhang T, Qi Q, Liu K X, Liu L, Zhang L, Xu B K 2006 Trans. Nonferrous Met. Soc. China 16 780
[34] [35] Navale S T, Bandgar D K, Nalage S R, Khuspe G D, Chougule M A, Kolekar Y D, Sen S, Patil V B 2013 Ceramics International 39 6453
[36] [37] Chi X, Liu C B, Liu L, Li Y, Wang Z J, Bo X Q, Liu L L, Su C 2014 Sensors and Actuators B 194 33
[38] [39] Song P, Wang Q, Yang Z X 2012 Materials Letters 86 168
[40] [41] Wang D W, Du S S, Zhou X, Wang B, Ma J, Sun P, Sun Y F, Lu G Y 2013 Cryst. Eng. Comm. 15 7438
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