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同轴异质In2O3/SnO2复合纤维的构筑及其甲醛敏感性能

吴煜霞 杜海英 张钊睿 丛丽颖 孙鹏程 许帅康 侯腾跃 孙舒鹏

吴煜霞, 杜海英, 张钊睿, 等. 同轴异质In2O3/SnO2复合纤维的构筑及其甲醛敏感性能[J]. 复合材料学报, 2022, 39(5): 2249-2257. doi: 10.13801/j.cnki.fhclxb.20210709.001
引用本文: 吴煜霞, 杜海英, 张钊睿, 等. 同轴异质In2O3/SnO2复合纤维的构筑及其甲醛敏感性能[J]. 复合材料学报, 2022, 39(5): 2249-2257. doi: 10.13801/j.cnki.fhclxb.20210709.001
WU Yuxia, DU Haiying, ZHANG Zhaorui, et al. Fabrication of In2O3/SnO2-coaxial-electrospinning fiber and investigation on its formaldehyde sensing properties[J]. Acta Materiae Compositae Sinica, 2022, 39(5): 2249-2257. doi: 10.13801/j.cnki.fhclxb.20210709.001
Citation: WU Yuxia, DU Haiying, ZHANG Zhaorui, et al. Fabrication of In2O3/SnO2-coaxial-electrospinning fiber and investigation on its formaldehyde sensing properties[J]. Acta Materiae Compositae Sinica, 2022, 39(5): 2249-2257. doi: 10.13801/j.cnki.fhclxb.20210709.001

同轴异质In2O3/SnO2复合纤维的构筑及其甲醛敏感性能

doi: 10.13801/j.cnki.fhclxb.20210709.001
基金项目: 国家自然科学基金(61501081);辽宁省自然科学基金(2015020096);辽宁省教育部春晖计划(9920311)
详细信息
    通讯作者:

    杜海英,博士,教授,硕士生导师,研究方向为传感器及智能检测技术 E-mail:duhaiying@dlnu.edu.com

  • 中图分类号: TB331

Fabrication of In2O3/SnO2-coaxial-electrospinning fiber and investigation on its formaldehyde sensing properties

  • 摘要: 两种半导体材料合成的复合材料由于电子亲合能和带隙宽度差形成了同型异质或异型异质结,利用异质结界面形成的费米能级效应可以提高界面载流子迁移率,从而有效改善气体传感器的气敏性能。本文采用自行设计开发的多层同轴静电纺丝装置,构筑了同轴异质复合纳米纤维In2O3/SnO2。所构筑的同轴异质复合纤维In2O3/SnO2外层较大的In2O3纳米颗粒附着在内层较小SnO2纳米颗粒表面,形成中空的分级纤维结构。同轴异质复合纤维In2O3/SnO2中由于存在大量的N-N同型异质结界面,电子迁移率增强,表面活性增强,吸附氧含量增加,对甲醛表现出良好的气敏性能。在250℃环境下,同轴复合纤维In2O3/SnO2气敏元件对50×10-6的甲醛响应为14.12,分别是SnO2、In2O3和混合异质In2O3/SnO2气敏元件对甲醛响应的3.22倍、3.84倍和1.51倍。同轴异质复合纤维In2O3/SnO2气敏元件对甲醛、乙醇、丙酮、甲苯和甲醇表现出良好的交叉选择性。利用同轴静电纺丝法构筑同轴异质复合纤维中提高半导体功能器件性能具有巨大的应用潜力和发展前景。

     

  • 图  1  同轴异质In2O3/SnO2复合纳米纤维结构示意图

    Figure  1.  Schematic diagram of composite nano-In2O3/SnO2 fiber structure

    图  2  同轴静电纺丝装置原理图

    Figure  2.  Schematic of coaxial electrospinning device

    图  3  同轴静电纺丝装置实物图

    Figure  3.  Physical drawing of coaxial electrospinning device

    图  4  SnO2、In2O3、In2O3/SnO2-T和In2O3/SnO2-H纳米纤维的XRD图谱

    Figure  4.  XRD spectra of SnO2, In2O3, In2O3/SnO2-T and In2O3/SnO2-H

    图  5  SnO2 (a)、In2O3 (b)、In2O3/SnO2-T (c)和In2O3/SnO2-H (d) 的SEM图像

    Figure  5.  SEM images of SnO2 (a), In2O3 (b), In2O3/SnO2-T (c) and In2O3/SnO2-H (d)

    图  6  In2O3/SnO2-T的EDS图谱

    Figure  6.  EDS spectra of In2O3/SnO2-T

    图  7  SnO2 (a)、In2O3 (b)、In2O3/SnO2-T (c) 和In2O3/SnO2-H (d) 的O1s XPS图谱

    Figure  7.  XPS O1s spectrum of SnO2 (a), In2O3 (b), In2O3/SnO2-T (c) and In2O3/SnO2-H (d)

    Olat—Lattice oxygen; Oads—Adsorbed oxygen; Ode—Oxygen defects

    图  8  SnO2 (a)、In2O3 (b)、In2O3/SnO2-T (c) 和In2O3/SnO2-H (d) 的纳米纤维N2等温吸附-脱附曲线

    Figure  8.  N2 isotherms adsorption-desorption curves of SnO2 (a), In2O3 (b), In2O3/SnO2-T (c) and In2O3/SnO2-H (d) nanofibers

    图  9  (a) In2O3/SnO2-T气敏元件对甲醛、乙醇、氨气、丙酮、甲苯和甲醇气体的交叉响应曲线;(b) SnO2、In2O3、In2O3/SnO2-T和In2O3/SnO2-H气敏元件工作温度曲线;(c) SnO2、In2O3、In2O3/SnO2-T和In2O3/SnO2-H气敏元件对甲醛的动态响应曲线;(d) SnO2、In2O3、In2O3/SnO2-T和In2O3/SnO2-H气敏元件的响应及恢复时间曲线

    Figure  9.  (a) Cross-response curves of In2O3/SnO2-T sensor to formaldehyde, ethanol, ammonia, acetone, toluene and methanol; (b) Sensitivities of SnO2, In2O3, In2O3/SnO2-T and In2O3/SnO2-H temperature curves; (c) Transient response curves of gas sensors based on the SnO2, In2O3, In2O3/SnO2-T and In2O3/SnO2-H to formaldehyde; (d) Response and recovery time of SnO2, In2O3, In2O3/SnO2-T and In2O3/SnO2-H sensors

    图  10  (a) SnO2和In2O3的能带示意图;(b) SnO2/ In2O3异质结传感机制和能带示意图

    Figure  10.  (a) Schematic energy band diagram of SnO2 and In2O3; (b) Schematic energy band diagram and illustration of sensing mechanism for a SnO2/In2O3 heterojunction

    EVAC—Vacuum level; EF—Fermi level; ECB—Conductive band; EVB—Valence band; Φ—Work function

    表  1  同轴异质纳米纤维In2O3/SnO2-T的元素含量

    Table  1.   Elements content of In2O3/SnO2-T composite nanofibers

    ElementMass fraction/wt%Atomic fraction/at%
    O 11.6 48.9
    In 39.6 23.3
    Sn 48.8 27.8
    下载: 导出CSV

    表  2  SnO2、In2O3、In2O3/SnO2-T和In2O3/SnO2-H的比表面积

    Table  2.   Specific surface areas of SnO2, In2O3, In2O3/SnO2-T and In2O3/SnO2-H nanofibers

    SampleSpecific surface areas/(m2·g−1)
    SnO2 37.9230
    In2O3 33.4763
    In2O3/SnO2−T 88.6171
    In2O3/SnO2−H 63.8690
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-21
  • 修回日期:  2021-06-09
  • 录用日期:  2021-06-27
  • 网络出版日期:  2021-07-09
  • 刊出日期:  2022-03-23

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