Synthesis of porous micro-sphere ZnO and its excellent sensing properties to acetone

被引：3
作者：
Bo Xiao-Qing [1 ]
Liu Chang-Bai [2 ]
Li Hai-Ying [1 ]
Liu Li [1 ]
Guo Xin [1 ]
Liu Zhen [1 ]
Liu Li-Li [1 ]
Su Chang [1 ]
机构：
[1] Jilin Univ, Coll Phys, Natl Lab Superhard Mat, Changchun 130012, Peoples R China
[2] Jilin Univ, Coll Elect Sci & Engn, Changchun 130012, Peoples R China
来源：
ACTA PHYSICA SINICA | 2014年 / 63卷 / 17期
关键词：
hydrothermal method; zinc oxide; acetone; gas sensor; HOLLOW SPHERES; NANOTUBES; NANOPARTICLES; NANOFIBERS;
D O I：
10.7498/aps.63.176803
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Porous micro-spheres of ZnO have been synthesized with Zn(NO3)(2 center dot)6H(2)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 degrees C, and the response and recovery durations are 4-10 seconds, respectively. Also, the sensor possesses an excelent selectivity for acetone.
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页数：5
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