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Electrospinning Derived NiO/NiFe2O4 Fiber-in-Tube Composite for Fast Triethylamine Detection under Different Humidity
ACS Sensors ( IF 8.2 ) Pub Date : 2022-04-04 , DOI: 10.1021/acssensors.1c02462 Jiaqi Yang 1 , Wenjiang Han 1 , Bin Jiang 1 , Xi Wang 1 , Yanfeng Sun 1 , Wenyang Wang 1 , Ruilin Lou 1 , Hedi Ci 1 , Hong Zhang 1 , Geyu Lu 1
ACS Sensors ( IF 8.2 ) Pub Date : 2022-04-04 , DOI: 10.1021/acssensors.1c02462 Jiaqi Yang 1 , Wenjiang Han 1 , Bin Jiang 1 , Xi Wang 1 , Yanfeng Sun 1 , Wenyang Wang 1 , Ruilin Lou 1 , Hedi Ci 1 , Hong Zhang 1 , Geyu Lu 1
Affiliation
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Designing high-performance triethylamine gas sensors with the stable gas response and low resistance variation in air under a wide relative humidity range is expected for human health and environmental surveillance. Here, a novel porous NiO/NiFe2O4 fiber-in-tube nanostructure is prepared by the electrospinning process. The characterizations related to microstructure and surface morphology are carried out. Meanwhile, the gas sensing performance of the porous fiber-in-tube NiO/NiFe2O4 materials is evaluated and compared systematically. The results indicate that the introduction of NiO as the second component can not only reduce the baseline resistance of NiFe2O4 gas sensors dramatically but also optimize the gas sensing performance to a significant extent. Especially, the fabricated sensor based on the NiO/NiFe2O4 fiber-in-tube with a Ni/Fe molar ratio of 1.5 exhibits the best performance. The gas response while detecting 50 ppm triethylamine at 300 °C is about 3.6 times higher than that with Ni/Fe molar ratio of 0.5. Moreover, the response values become more stable, and the baseline resistance has a lower variation under a wide relative humidity range, demonstrating the excellent humidity resistance. These phenomena might be ascribed to the distinctive fiber-in-tube nanostructure as well as the heterojunction between NiFe2O4 and NiO.
中文翻译：
静电纺丝衍生的 NiO/NiFe2O4 管内纤维复合材料在不同湿度下快速检测三乙胺
设计高性能三乙胺气体传感器，在较宽的相对湿度范围内具有稳定的气体响应和低电阻变化，有望用于人类健康和环境监测。在这里，通过静电纺丝工艺制备了一种新型多孔 NiO/NiFe 2 O 4纤维管纳米结构。进行了与微观结构和表面形态相关的表征。同时，系统地评价和比较了多孔管内纤维NiO/NiFe 2 O 4材料的气敏性能。结果表明，NiO作为第二组分的引入不仅可以降低NiFe 2 O 4的基线电阻。气体传感器极大地优化了气体传感性能。特别是基于Ni/Fe摩尔比为1.5的NiO/NiFe 2 O 4管内纤维制造的传感器表现出最佳性能。在 300 °C 下检测 50 ppm 三乙胺时的气体响应比 Ni/Fe 摩尔比为 0.5 时的气体响应高约 3.6 倍。此外，响应值变得更加稳定，在较宽的相对湿度范围内，基线电阻变化较小，显示出优异的耐湿性。这些现象可能归因于独特的管中纤维纳米结构以及NiFe 2 O 4和NiO之间的异质结。
更新日期：2022-04-04
中文翻译：
静电纺丝衍生的 NiO/NiFe2O4 管内纤维复合材料在不同湿度下快速检测三乙胺
设计高性能三乙胺气体传感器，在较宽的相对湿度范围内具有稳定的气体响应和低电阻变化，有望用于人类健康和环境监测。在这里，通过静电纺丝工艺制备了一种新型多孔 NiO/NiFe 2 O 4纤维管纳米结构。进行了与微观结构和表面形态相关的表征。同时，系统地评价和比较了多孔管内纤维NiO/NiFe 2 O 4材料的气敏性能。结果表明，NiO作为第二组分的引入不仅可以降低NiFe 2 O 4的基线电阻。气体传感器极大地优化了气体传感性能。特别是基于Ni/Fe摩尔比为1.5的NiO/NiFe 2 O 4管内纤维制造的传感器表现出最佳性能。在 300 °C 下检测 50 ppm 三乙胺时的气体响应比 Ni/Fe 摩尔比为 0.5 时的气体响应高约 3.6 倍。此外，响应值变得更加稳定，在较宽的相对湿度范围内，基线电阻变化较小，显示出优异的耐湿性。这些现象可能归因于独特的管中纤维纳米结构以及NiFe 2 O 4和NiO之间的异质结。
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