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

Material	Structure	Average Diameter	Target gas	Concentration	Response	T _response/T _recovery	Temperature(℃)	Limit of detection	ref
WO₃-SnO₂	Core-shell	220~240 nm	Ethanol	0.01‰	5.09	18.5/282 s	280	-	107
ZnO@In₂O₃	Core@shell	60 nm	Ethanol	0.1‰	31.87	52/3.7 s	225	~0.005‰	108
SnO₂-ZnO	Nanofibers	100 nm	H₂	0.00005‰	50.1	-	300	0.00005‰	97
SnO₂/TiO₂	Nanofibers	100~200 nm	Ethanol	0.1‰	9.58	8/10 s	240	0.005‰	109
TiO₂-SnO₂	Core-shell	-	Acetone	0.1‰	13.7	2/60 s	280	0.01‰	110
WO₃-CuO	Hollow-core	50 nm	DMMP	0.01‰	19.3	9.2/15.5 s	25	0.0005‰	111
Co₃O₄-ZnO	Core-shell	200 nm	HCHO	0.1‰	5	6/9 s	220	0.01‰	112
α-Fe₂O₃@NiO	Core-shell	90~180 nm	HCHO	0.05‰	12.8	2/9 s	240	0.001‰	113

Table 3 Sensing properties of composites of semiconducting metal oxide nanostructures

Other figure/table from this article

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
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]
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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