为研究p型材料和n型材料复合时气敏特性的变化，采用静电纺丝法分别制备了CuO、SnO2以及3种比例混合的CuO／SnO2复合纳米纤维材料，并通过XRD及SEM对其形貌、微观结构等进行表征。测试了该5种材料对丙酮、甲醛、甲醇、乙醇、甲苯等VOC气体的敏感特性。研究表明，CuO／SnO2＝2∶1的复合材料对丙酮、甲苯和乙醇的的响应值有一定提高；CuO／SnO2＝1∶1的复合材料对丙酮具有很高响应的同时，对乙醇和甲苯的响应产生了一定的抑制作用，从而大大提高了材料的选择性。其机理是：半导体材料复合后，在复合材料的表面会有更多的氧吸附，导致更多的VOC气体在半导体材料表面发生反应，使材料的电阻值变化更加明显，提高了材料的响应值。
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