高等学校化学学报 ›› 2018, Vol. 39 ›› Issue (8): 1631-1639.doi: 10.7503/cjcu20170804

• 研究论文: 无机化学 • 上一篇    下一篇

醋酸钾溶液体系中α-Fe2O3纳米微球的离子液体辅助合成及气敏性能研究

潘帅1, 胡校兵1, 宋润民1, 解丽丽1,2, 朱志刚1,2(), 郑嘹赢3   

  1. 1. 上海第二工业大学工学部环境与材料工程学院, 上海 201209
    2. 上海材料创新研究院, 上海 200444
    3. 中国科学院上海硅酸盐研究所, 上海 200050
  • 收稿日期:2017-12-11 出版日期:2018-08-10 发布日期:2018-04-28
  • 作者简介:联系人简介: 朱志刚, 男, 博士, 教授, 主要从事智能传感材料与器件研究. E-mail: zgzhu@sspu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 61471233)、 上海高校特聘教授(东方学者)计划、 中国科学院无机功能材料与器件重点实验室开放课题(批准号: 201602)和上海第二工业大学研究生项目(批准号: EGD16YJ022)资助.

Ionic Liquid Assisted Synthesis of α-Fe2O3 Nanospheres Based on Potassium Acetate Solution and Their Gas-sensing Properties

PAN Shuai1, HU Xiaobing1, SONG Runmin1, XIE Lili1,2, ZHU Zhigang1,2,*(), ZHENG Liaoying3   

  1. 1. School of Environmental and Materials Engineering, College of Engineering,Shanghai Polytechnic University, Shanghai 201209, China
    2. Shanghai Innovation Institute for Materials, Shanghai 200444, China
    3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
  • Received:2017-12-11 Online:2018-08-10 Published:2018-04-28
  • Contact: ZHU Zhigang E-mail:zgzhu@sspu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.61471233), the Program for Professor of Special Appointment(Eastern Scholar) at Shanghai Institations of Higher Learning, the Open Project Program of Key Laboratory of Inorganic Functional Materials and Devices of Chinese Academy of Sciences, China(No.201602) and the Graduate Program Foundation of Shanghai Polytechnic University, China(No.EGD16YJ022).

摘要:

以FeCl3·6H2O和CH3COOK为反应物, 以离子液体1-丁基-3-甲基咪唑氯化物([Bmim]Cl)为结构导向剂和表面活性剂, 采用水热合成法在150 ℃反应8 h制备出结晶度好、 形貌规整, 直径为10~30 nm的α-Fe2O3纳米微球. 考察了[Bmim]Cl的添加量对氧化铁形貌和气敏性能的影响. 气敏性能测试结果表明: 当离子液体添加量为12 mmol时, α-Fe2O3纳米微球对乙醇的气敏性能最佳. 在工作温度为300 ℃时, 对50 μL/L乙醇的灵敏度达到7.56, 是不添加离子液体时制备的α-Fe2O3的5.6倍, 在10~200 μL/L的检测范围内灵敏度与浓度具有良好的线性关系(R=98.8%), 并且具有良好的选择性和稳定性. 本文还详细探讨了α-Fe2O3纳米微球对乙醇的敏感机理, 以及工作温度对其气敏性能的影响.

关键词: 水热合成法, 氧化铁, 离子液体, 气敏性能

Abstract:

α-Fe2O3 nanospheres with good crystallinity and uniformity, diameter of 10—30 nm were synthesized from FeCl3·6H2O and CH3COOK with 1-butyl-3-methylimidazolium chloride([Bmim]Cl) as ionic liquid structure-based agent and surfactant by hydrothermal method at a constant temperature of 150 ℃ for 8 h. The effects of different amounts of [Bmim]Cl on the formation of iron oxide and its gas sensing properties were investigated. The gas-sensing results show that α-Fe2O3 nanospheres exhibit the best gas-sensing properties to ethanol when the amount of ionic liquid is 12 mmol. When the working temperature is 300 ℃, the sensitivity of as-prepared α-Fe2O3 nanospheres to 50 μL/L ethanol is 7.56, which is 5.6 times that of α-Fe2O3 generated without ionic liquid. There is also a good linear relationship(R=98.8%) in the range of 10—200 μL/L, and the sensor has good selectivity and stability. In addition, the gas-sensing mechanism of α-Fe2O3 nanospheres to ethanol, and the influence of operating temperature on its gas-sensing properties were discussed in detail.

Key words: Hydrothermal method, Iron oxide, Ionic liquid, Gas-sensing

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