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摘要
The nanorods bundles (urchinlike) ZnO microspheres, consisting of closely packed nanorods with wideness of about 50 nm, have been successfully synthesized by a hydrothermal route at the temperature of 140 degrees C. The individual hierarchical ZnO microsphere ranged from 3.5 to 4.5 mu m in diameter. Most importantly, ZnO hierarchical microsphere sensor exhibits excellent selectivity and fast response to acetone. Response and recovery times were 1 s and 3 s when the sensor was exposed to 100 ppm acetone at an operating temperature of 320 degrees C. Thus, hierarchical structures play a significant role in the field of gas sensing.
- 出版日期2012-4
- 单位吉林大学
