静电纺丝法制备有序V2O5微纳米纤维膜及其气敏特性

无机材料学报, 2014, 29(3): 315-320. doi: 10.3724/SP.J.1077.2014.13289

静电纺丝法制备有序V2O5微纳米纤维膜及其气敏特性

汤玉斐 ^1, , 谢高伟 ^2, , 赵康 ^3, , 姜磊 ^4, , 滕乐天 ^5,

1.西安理工大学材料科学与工程学院,西安,710048

2.西安理工大学材料科学与工程学院,西安,710048

3.西安理工大学材料科学与工程学院,西安,710048

4.西安理工大学材料科学与工程学院,西安,710048

5.西安理工大学材料科学与工程学院,西安,710048

基金项目: Key Projects of the Natural Science Foundation of Shaanxi Province(2012JZ6001) 陕西省教育厅科研计划项目(12JK0428)The Ph.D.Programs Foundation of Ministry of Education of China(20106118110002) 陕西省自然科学基金重点项目(2012JZ6001) Scientific Research Program Funded by Shaanxi Provincial Education Department(12JK0428) 教育部高等学校博士学科点专项科研基金(20106118110002)

关键词： V2O5 , 静电纺丝 , 微纳米纤维膜 , 有序程度 , 气敏特性

Fabrication and Gas Sensing Properties of Aligned Vanadium Pentoxide Micro-nano Fiber Membranes by Electrospinning

Keywords： V2O5 , electrospinning , micro-nano fiber membrane , alignment degree , gas sensing property

为了提高微纳米纤维膜气敏材料的灵敏度和响应时间,本研究采用静电纺丝法结合分离式平行收集极制备有序排列的V2O5微纳米纤维膜,利用XRD、SEM等手段表征纤维膜的相组成、微观形貌以及有序程度,探讨了有序程度对V2O5气体灵敏度、响应时间以及恢复能力的影响.研究结果表明:500℃煅烧后所得微纳米纤维膜由V2O5相组成.平行收集极间距对纤维膜的微观形貌影响较大,当间距为3 mm时可以获得有序程度为66％的V2O5微纳米纤维膜,其在80～400℃范围内电阻的变化幅度约为2个数量级.当工作温度为300℃时,V2O5微纳米纤维膜对C2H5OH的灵敏度均高于CH4和NH3,其中有序V2O5微纳米纤维膜对浓度为200 mg/L C2H5OH气体的灵敏度约为0.9,响应时间为3s,但恢复性能较低,62 s后阻值仅恢复到初始阻值的55％.

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