高等学校化学学报 ›› 2014, Vol. 35 ›› Issue (8): 1615.doi: 10.7503/cjcu20140457

• 研究论文: 无机化学 • 上一篇    下一篇

γ-Fe2O3纳米纤维的丙酮敏感特性

杨敏, 刘晓旸, 赵旭东, 李本仙, 王晓峰()   

  1. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2014-05-14 出版日期:2014-08-10 发布日期:2014-06-23
  • 作者简介:联系人简介: 王晓峰, 男, 博士, 副教授, 主要从事高压固相合成研究. E-mail: wangxf103@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21301066, 21371068, 21271082)资助

Acetone Sensing Characteristics of γ-Fe2O3 Nanofibers

YANG Min, LIU Xiaoyang, ZHAO Xudong, LI Benxian, WANG Xiaofeng*()   

  1. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2014-05-14 Online:2014-08-10 Published:2014-06-23
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21301066, 21371068, 21271082)

摘要:

采用静电纺丝法制备了PVP/FeC6H5O7复合纳米纤维, 并将复合纤维在500 ℃高温烧结3 h, X射线衍射分析(XRD)表明, 烧结后的产物为正尖晶石结构的γ-Fe2O3晶体. 扫描电子显微镜(SEM)观测结果表明, 制得了直径均匀、 连续的复合纳米纤维, 其平均直径约为1000 nm; 烧结后的γ-Fe2O3纳米纤维保持了其连续性, 但纤维发生了收缩, 直径较烧结前小, 平均约为600 nm. 比表面积分析表明, γ-Fe2O3纳米纤维比表面积为57.18 m2/g. 气敏性能测试结果表明, 230 ℃为γ-Fe2O3纳米纤维检测丙酮气体的最佳工作温度. 在此温度下, γ-Fe2O3纳米纤维对丙酮气体表现出高响应度[S=6.9, c(Acetone)=7.88×104 mg/m3]和线性度(7.88×102~1.58×105 mg/m3浓度范围内). 同时, γ-Fe2O3纳米纤维气体传感器件还表现出良好的长期稳定性.

关键词: 静电纺丝法, γ-Fe2O3, 纳米纤维, 丙酮, 气体传感

Abstract:

PVP/FeC6H5O7 composite nanofibers were prepared via electrospinning method. After 3 h of calcinations, the composite PVP/FeC6H5O7 nanofibers were turned to γ-Fe2O3 nanofibers. X-ray diffraction(XRD), scanning electron microscopy(SEM) and the Brunauer-Emmett-Teller(BET) method were employed to characterize the products. Before calcinations, the composite nanofibers had smooth and uniform surfaces with an average diameter about 1000 nm. After calcinations, the nanofibers shrank but maintained the continuous structures with an average diameter about 600 nm. When used to detect acetone, sensor based on γ-Fe2O3 nanofibers exhibited high response, good linear dependence(7.88×102—1.58×105 mg/m3), fast response and recovery speed at 230 ℃. The sensor also showed good stability. These properties make the γ-Fe2O3 nanofibers good candidates for acetone detection.

Key words: Electrospinning, γ-Fe2O3, Nanofiber, Acetone, Gas sensor(Ed.: F, K, M)

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