溶剂热法制ZnO纳米棒及其气敏性能

以乙酰丙酮锌为原料,采用溶剂热法首次合成了棒状ZnO纳米粉体,并对该材料在不同工作温度下的气敏性能进行了研究。通过XRD、SEM和TEM等测试手段,表征其物相与结构。该粉体为六方晶系的ZnO纳米棒,直径约为30 nm,长度约为100 nm,结晶良好。通过静态配气法发现:采用N型氧化锌纳米棒所制得的元件在270℃下,对体积分数为5×10-4的乙醇有较好的气敏性能,灵敏度为75,响应时间及恢复时间分别为30、60 s,说明制备的ZnO纳米棒是具有潜力的探测乙醇气体的气敏传感器材料。

Gas sensing performance of ZnO nanorods synthesized by solvothermal method

This paper describes the first synthesis of ZnO nanorods using a simple solvothermal method,with zinc acetylacetonate(Zn(C5H7O2) 2·H2O) as the raw materials,the investigation into the gas sensing performances of materials subjected to different temperatures,and the characterization of the phases and structure using X-ray diffraction (XRD),scanning electron microscopy(SEM),and transmission electron microscope(TEM).The products,behaving as ZnO nanorods of hexagonal system with the diameter of about 30 nm,and the length of about 100 nm,feature a better crystallization.Stationary state gas distribution method leads to the finding that at the working temperature of 270 ℃,the elements synthesized with N-type ZnO nanorods exhibit a better gas sensing response to 5 × 10-4 volume fraction of ethanol,with a sensitivity of 75,a response time of 30 s,and a recovery time of 60 s.It follows that the prepared ZnO nanorods act as gas sensor materials with a potentially greater ability to detect ethanol gas.