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采用低温水热法合成了氧化锌(Zn O)一维纳米棒,通过X射线衍射(XRD)和扫描电子显微镜(SEM)及高分辨透射电子显微镜(HRTEM)研究了其相结构与形貌,并测试了基于Zn O一维纳米棒所制作的传感器的气敏性能.研究表明,该气体传感器对体积分数为500×10-6的乙醇的检测灵敏度为35.71,对乙醇气体的响应和恢复时间分别约为7 s和9 s,并具有优良气体选择特性,最后,结合电子释放理论解释了其气敏机理.
Zinc oxide (ZnO) one-dimensional nanorods were synthesized by low temperature hydrothermal method. Their phase structures and morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) And the gas sensing performance of the sensor based on the one-dimensional Zn O nanorods was tested.The research shows that the gas sensor has the detection sensitivity of 35.71 for ethanol with a volume fraction of 500 × 10-6, the response to ethanol gas and the recovery time Respectively, about 7 s and 9 s, and has good gas selectivity characteristics. Finally, the gas sensing mechanism is explained based on the theory of electron emission.