| Autor: |
Xin-xin Yu, Xian-song Liu, Ming-zai Wu, Zhao-qi Sun, Guang Li, Xiao-shuang Chen |
| Zdroj: |
Chinese Journal of Chemical Physics (1674-0068); Feb2014, Vol. 27 Issue 1, p99-102, 4p |
| Abstrakt: |
Three-dimensional (3D) hierarchical Co3O4 microcrystal with radial dendritic morphologies was prepared through hydrothermal reactions followed by subsequent annealing treatment. Structural and morphological characterizations were performed by X-ray diffraction, scan- ning electron microscopy and transmission electron microscopy. The gas sensing properties of the as-obtained microcrystal were investigated at 110 °C, which revealed that the 3D hierarchical porous Co3O4 microcrystal exhibited high sensitivity to ammonia, as well as a short response time of 10 s. The response characteristic indicates that the sensor has a good stability and reversibility. Detections of toxic and flammable gases, such as ethanol, acetone and benzene were also carried out at a relative low temperature. The results indicate that such hierarchical Co3O4 microcrystal would be a potential material in the field of gas sensing. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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