Cu2+-doped ZnO nano-rod powders (0-6mol%) were prepared via solvothermal method. The crystal and micro-morphology of the doped ZnO nano-rods were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The effects of Cu2+ dopant and the thermal condition (reaction temperature and duration) on the gas sensitivities of ZnO nano-rods were studied. The gas sensing properties of pure ZnO nanorod sensor and 3mol% Cu2+doped ZnO nano-rod sensors to formaldehyde, acetic acid, toluene, ethanol, acetone and trimethylamine were also studied. The results show that the micro-morphology of ZnO powders arc nano-rods, the lengths and diameters of ZnO nanorods change with the variation of the Cu + concentration. The sensor based on 3mol% Cu2--doped ZnO nano-rods exhibits high response and good selectivity to dilute ethanol, the responses to 1 × 10 -3 ethanol and 1 × 10-6 ethanol reach 380.5 and 4.2 when it works at 395℃, respectively, and its response time and recovery time are 16 s and 40 s, respectively.%通过溶剂热法(无水乙醇)制备了Cu2+(0～6mol％)掺杂ZnO纳米棒粉体,采用X射线衍射仪和扫描电镜对掺杂ZnO纳米粉体的晶体结构和微观形貌进行了表征.研究了Cu2+掺杂比例、溶剂热反应温度及时间对材料气敏性能的影响;考察ZnO(120℃,10 h)和3mol％ Cu2+掺杂ZnO(120℃,10h)粉体对应元件对甲醛、乙酸、甲苯、乙醇、丙酮、三甲胺等六种气体的气敏性能.结果表明:通过溶剂热法制备的ZnO粉体为纳米棒状结构,棒长度和直径随Cu2+掺杂比例不同发生变化;3mo1％ Cu2+掺杂ZnO(120℃,10 h)样品对应元件对低浓度乙醇有很好的选择性,在395℃工作温度下对1×10-3乙醇的灵敏度为380,5,响应和脱附时间分别为5s和40 s,对1×10 6乙醇的灵敏度可达4.2.
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