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中文摘要：
采用静电纺丝法,分别选取不同的有机溶剂PVP,PMMA,制备了SnO２的有机物纳米纤维. 在６００℃温度下退火后,得到不同形貌的SnO２纳米材料(SnO２纳米纤维和SnO２纳米颗粒).分别通过XRD,SEM,TEM,BET等表征方法对材料的微结构进行了表征,并分别制备了基于SnO２纳米纤维和SnO２纳米颗粒的气敏元件,测试了这些元件对(０．５~５０)×１０－６的甲醛气体的敏感性能.测试结果表明,在(０．５~５０)×１０－６甲醛浓度范围内,SnO２ 纳米颗粒气敏元件比SnO２纳米纤维气敏元件表现出更低的工作温度、更高的响应灵敏度和略长的响应及恢复时间.两种元件都对甲醛表现出良好的选择性.最后,分析了SnO２纳米材料对甲醛的吸附机理。
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