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通过静电纺丝法制备中空多孔的NiO/SnO2复合纳米纤维,在复合纤维表面装饰碳纳米管,在此基础上制备气敏传感器器件.利用TGA确定了复合材料热分解温度和热处理工艺;利用SEM、XRD、TEM、XPS分别对复合材料的形貌、结构、尺寸、表面成分进行了表征.使用WS-30A气敏元件测试仪对气敏元件响应进行了测试.结果 表明,CNTs修饰的NiO/SnO2复合纳米材料制备的气敏传感器降低了丙酮检测的最佳工作温度为160℃,提高了检测灵敏度,对50 μL/L丙酮的响应达到25.25,对检测丙酮有快速的响应(～8.2 s)以及恢复性能(～10.5 s),同时在30d的长期稳定性测试中也体现了良好的稳定性.证明了装饰CNTs的NiO/SnO2复合材料在检测丙酮方面的潜在价值,同时也进一步讨论了CNTs,中空多孔结构的NiO/SnO2提高检测性能的作用机理.“,”The hollow porous NiO/SnO2 composite nanofibers were prepared by electrospinning method,then the carbon nanotubes (CNTs) were decorated on the surface of the composite fibers,marked as CNTs/NiO/SnO2.On this basis,a gas sensor device was prepared.The thermal decomposition temperature and heat treatment process of the composites were determined by TGA.The morphology,structure,size and surface composition of the composites were characterized by SEM,XRD,TEM and XPS.The test results of the gas sensors based on the composites show that the gas sensor prepared by CNTs NiO/SnO2 composite nanomaterial reduces the optimum working temperature in detecting acetone gas,which is 160 ℃,and the composite nanomaterial also improves the detection sensitivity.The gas sensors based on CNTs/NiO/SnO2 have a good response to 50 μL/L acetone,reaching 25.25,and quick response to the detection of acetone (～8.2 s) with a recovery time of only ～10.5 s,and also show good stability in the 30 d long-term stability test.The potential value of NiO/SnO2 composites with decorative CNTs in the detection of acetone was proved.At the same time,the mechanism of the improvement of detection performance of CNTs and hollow porous structure NiO/SnO2was discussed.