Abstract：Porous ZnO nanorods were synthesized by hydrothermal method. The structure and morphology of porous ZnO nanorods were characterized by X-ray diffraction (XRD) and scanning electron microscopy(SEM).The gas sensing properties of heater structure sensors based on porous ZnO nanorods were investigated, and the gas sensitivity of sensor samples at different temperatures to ethanol gas was examined. The results show that the sensitivity of sensor to 100×10-6 ethanol gas is 27.9 at 280℃.The response and recovery times of sensor are about 3s and 10s, respectively. The sensitivity is 4.8 times larger than that of sensor based on ZnO nanorods to ethanol gas in the same conditions. Moreover, the sensitivity of sensor to ethanol gas is 3.1 times larger than that to acetone, which demonstrates that the sensor possesses an excellent selectivity.
薄小庆, 刘唱白, 何越, 刘丽, 刘震, 王连元. 多孔纳米棒氧化锌的制备及其气敏特性[J]. 材料工程, 2014, 0(8): 86-89.
BO Xiao-qing, LIU Chang-bai, HE Yue, LIU Li, LIU Zhen, WANG Lian-yuan. Fabrication and Gas Sensing Properties of Porous ZnO Nanorods. Journal of Materials Engineering, 2014, 0(8): 86-89.
 SUN Z P, LIU L,ZHANG L,et al. Rapid synthesis of ZnO nano-rods by one-step,room-tempreature,solid-state reaction and their gas-sensing properties[J].Nanotechnology,2006,17(9):2266-2270.
 李赫,王艳花,孙娜波.水热法制备氧化锌纳米棒及其形貌控制[J].浙江树人大学学报,2012,12(4):12-15. LI He, WANG Yan-hua, SUN Na-bo. ZnO nanorob preparation using hydrothermal method and morphology control[J].Journal of Zhejiang Shuren University,2012,12(4):12-15.
 RAI P,RAJ S,KO K J,et al.Synthesis of flower-like ZnO microstructures for gas sensor applications[J]. Sensors and Actuators B:Chemical,2013,178:107-112.
 QI Q,ZHANG T,LIU L,et al.Selective acetone sensor based on dumbbell-like ZnO with rapid response and recovery[J]. Sensors and Actuators B:Chemical,2008,134(1):166-170.
 MA S S,LI R, LV C P,et al.Facile synthesis of ZnO nanorod arrays and hierarchical nanostructures for photocatalysis and gas sensor applications[J].Journal of Hazardous Materials,2011,192(2):730-740.
 GU C P,LI S S, HUANG J R,et al.Preferential growth of long ZnO nanowires and its application in gas sensor[J].Sensors and Actuators B:Chemical,2013,177:453-459.
 LAM S M, SIN J C, ABDULLAH A Z, et al. Green hydrothermal synthesis of ZnO nanotubes for photocatalytic degradation of methylparaben[J]. Materials Letters,2012,93:423-426.
 WANG H T, WU T. Formation of complex nanostructures drven by polar surfaces[J]. Journal of Materials Chemistry,2011,21(39):15095-15099.
 WANG W C,TIAN Y T,WANG X C,et al.Ethanol sensing properties of porous ZnO spheres via hydrothermal route[J].Journal of Materials Science,2013,48(8):3232-3238.
 PRABHAKAR R, SUDARSAN R, KYOUNG J K,et al. Synthesis of flower-like ZnO microstructures for gas sensor applications[J]. Sensors and Actuators B:Chemical,2013,178:107-112.
 SONG P, WANG Q, YANG Z X. Acetone sensing characteristics of ZnO hollow spheres prepared by one-pot hydrothermal reaction[J]. Materials Letters,2012,(86):168-170.