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.

引用

页数：5

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