Enhanced triethylamine sensing performance of metal–organic framework derived nest-type Fe-doped NiO nanostructure,Inorganic Chemistry Frontiers

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Enhanced triethylamine sensing performance of metal–organic framework derived nest-type Fe-doped NiO nanostructure
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2020/02/14 , DOI: 10.1039/d0qi00057d
Dongxue Wang _{1,

2,

3,

4} , Chengbo Zhai _{1,

2,

3,

4} , Liyong Du _{1,

2,

3,

4} , Kuikun Gu _{1,

2,

3,

4} , Mingzhe Zhang _{1,

2,

3,

4}

Affiliation

Currently, most triethylamine gas sensors show long recovery times and poor stabilities, which are not conducive to the application of TEA sensors. Therefore, it is necessary to produce TEA sensors with high response values and fast response and recovery speeds. In this work, we have prepared unique nest-type Fe-doped NiO by a facile hydrothermal reaction with an annealing process. The 0.52at%Fe-doped NiO-based sensor showed significantly improved triethylamine gas performance compared with the pure NiO sensor. The response value for 50 ppm TEA was up to 64, which was about 21 times higher than that of the pure NiO sensor at the same optimum operating temperature of 260 °C. It exhibited a quick response (26 s) and recovery time (5 s), lower detection limit, good selectivity and stability. The fast recovery time (5 s) compensated for the disadvantages of most TEA sensors. Combined with the high response value, the results indicated that the as-prepared nest-type Fe-doped NiO can be used as an ideal material for the effective detection of TEA. Finally, the growth mechanism and improved gas sensitivity mechanism of the Fe-doped NiO was explored in detail.

中文翻译：

金属-有机骨架衍生的嵌套型铁掺杂NiO纳米结构的三乙胺感测性能增强

当前，大多数三乙胺气体传感器显示出较长的恢复时间和较差的稳定性，这不利于TEA传感器的应用。因此，有必要生产具有高响应值以及快速响应和恢复速度的TEA传感器。在这项工作中，我们通过退火过程中的水热反应制备了独特的巢型掺Fe NiO。与纯NiO传感器相比，掺杂0.52at％Fe的NiO基传感器显示出显着改善的三乙胺气体性能。50 ppm TEA的响应值高达64，在相同的260°C最佳工作温度下，其响应值是纯NiO传感器的响应值的约21倍。它显示出快速的响应（26 s）和恢复时间（5 s），较低的检测限，良好的选择性和稳定性。快速恢复时间（5 s）弥补了大多数TEA传感器的缺点。结合高响应值，结果表明，所制备的巢式掺铁NiO可以作为有效检测TEA的理想材料。最后，详细研究了掺Fe的NiO的生长机理和改善的气体敏感性机理。

更新日期：2020-03-19

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