Progress in Chemistry

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Applications of Electrospun One-Dimensional Nanomaterials in Gas Sensors

Lei Zhu, Jianan Wang, Jianwei Liu, Ling Wang, Wei Yan

Progress in Chemistry, 2020, 32(2-3): 344-360. DOI: 10.7536/PC190628

Fig.5 TEM images of the BW/TiO₂ HNFs and dynamic ethanol response-recovery curves of the BW/TiO₂HNFs-based flexible sensing devices under different bent state^[104]

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Fig.1 Different morphologies of electrospun fibers (a) beaded^[14]; (b) smooth^[15];(c) ribbon^[16]; (d) multichannel tubular^[17]; (e)hollow^[18];(f) nanowire-in-microtube^[19];(g)brush-like^[20];(h)chain-like^[21] and (i)nano-net^[22]
Fig.2 Smplified gas sensing mechanism of space charged model of (a)n type and(b)p type semiconductor metal oxide^[24]
Fig.3 Schematic diagram of the proposed bifunctional sensing mechanism: reducing gas (H₂) effect at SnO₂ homointerfaces^[25]
Table 1 Summary of sensing properties of semiconducting metal oxide nanostructures
Fig.4 (a) Schematic illustration of synthetic process of PdO@ZnO-SnO₂ NTs; (b) SEM image of as-spun Pd@ZIF-8/PVP/Sn composite NFs;(c) TEM image of as-spun Pd@ZIF-8/PVP/Sn composite NFs;(d) SEM image of PdO@ZnO-SnO₂NTs;(e) Dynamic acetone response transition in the concentration range of 0.0001‰~0.005‰ at 400 ℃; (f) selective sensing characteristics of PdO@ZnO-SnO₂ NTs toward 0.001‰ of various analytes at 400 ℃^[85]
Table 2 Summary of sensors made of metal ion doped semiconducting metal oxide nanostructures and their sensing properties
Table 3 Sensing properties of composites of semiconducting metal oxide nanostructures
Table 4 Sensing properties of composites of conductive polymer and semiconductor metal oxide nanostructures
Table 5 Sensing properties of composites of graphene and semiconductor metal oxide nanostructures
Table 6 The advantages and disadvantages of gas sensor prepared with different materials
Table 7 Summary of different gas sensors prepared by electrospinning

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