期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 171, 期 -, 页码 256-262出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.03.058
关键词
Sensor; alpha-MoO3; CuO; H2S sensing characteristics; p-n junction
资金
- National Natural Science Foundation of China [51072038, 21001035]
- Program for New Century Excellent Talents in University [NECT-10-0049]
- Outstanding Youth Foundation of Heilongjiang Province [JC201008]
- [HEUCF201210006]
One-dimensional (1D) alpha-MoO3/CuO nanocomposite has been synthesized via a simple method. This nanocomposite consists of n-type alpha-MoO3 nanorods decorated with p-type CuO nanoparticles, leading to the formation of p-n junctions at their interfaces. The p-n junction nanocomposite exhibits great enhanced H2S gas sensing properties, compared to pristine alpha-MoO3 nanorods. The sensor response of this nanocomposite is up to 272.0-10 ppm H2S gas at the optimal working temperature (270 degrees C), which is 53.3 times higher than that of alpha-MoO3 nanorods. More importantly, even at 100 degrees C. alpha-MoO3/CuO p-n junction nanocomposite still has very strong response to 5 ppm H2S gas. In addition, the nanocomposite sensors have a very good selectivity to H2S gas. Such enhanced H2S sensing performances are attributed to the disappearance of p-n junctions, which can be proved by the fact that crystalline CuO nanoparticles are converted into amorphous CuS ones after the nanocomposite is exposed to H2S gas. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据