Preparation and Gas Sensing Properties of SnO2/NiO Composite Semiconductor Nanofibers

Yuxing CHU; Hairui LIU; Shuang YAN

doi:10.15541/jim20200675

Journals >Journal of Inorganic Materials >Volume 36 >Issue 9 >Page 950 > Article

Journal of Inorganic Materials
Vol. 36, Issue 9, 950 (2021)

Preparation and Gas Sensing Properties of SnO₂/NiO Composite Semiconductor Nanofibers

Yuxing CHU¹, Hairui LIU^1、2, and Shuang YAN^1、*

Author Affiliations

¹1. School of Textile and Materials Engineering, Dalian Polytechnic University, Dalian 116034, China

²2. School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China

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DOI: 10.15541/jim20200675 Cite this Article

Yuxing CHU, Hairui LIU, Shuang YAN. Preparation and Gas Sensing Properties of SnO₂/NiO Composite Semiconductor Nanofibers [J]. Journal of Inorganic Materials, 2021, 36(9): 950 Copy Citation Text

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Preparation mechanism diagram of SnO2/NiO NFs

1. Preparation mechanism diagram of SnO₂/NiO NFs

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SEM images of (a) CNFs@Ni(OH)2 and (b) NiO NFs

2. SEM images of (a) CNFs@Ni(OH)₂ and (b) NiO NFs

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3. SEM images of (a, b) SnO₂/NiO-1 NFs, (c, d) SnO₂/NiO-2 NFs, (e, f) SnO₂/NiO-3 NFs, and (g, h) SnO₂/NiO-4 NFs

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4. XRD patterns of SnO₂/NiO-1 NFs, SnO₂/NiO-2 NFs,SnO₂/NiO-3 NFs, and SnO₂/NiO-4 NFs

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$(a) Sensitivity curves of NiO NFs, SnO2/NiO-1 NFs, SnO2/NiO-2 NFs, SnO2/NiO-3 NFs, and SnO2/NiO-4 NFs to ethanol gas at different temperatures, and (b) response recovery curve to 100×10-6 ethanol gas (volume fraction) at the optimal working temperature$

5. (a) Sensitivity curves of NiO NFs, SnO₂/NiO-1 NFs, SnO₂/NiO-2 NFs, SnO₂/NiO-3 NFs, and SnO₂/NiO-4 NFs to ethanol gas at different temperatures, and (b) response recovery curve to 100×10^-6 ethanol gas (volume fraction) at the optimal working temperature

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6. Selectivity of SnO₂/NiO-1 NFs, SnO₂/NiO-2 NFs, SnO₂/NiO-3 NFs, and SnO₂/NiO-4 NFs to various target gases(100 mg/L)

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7. (a) Sensitivity curves of SnO₂/NiO-3 NFs and MQ-3 to 100×10^-6 ethanol gas at different working temperatures, and (b) response recovery curve to 100×10^-6 ethanol gas at the optimal working temperature

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Sample	Ni/%	Sn/%
NiO NFs	100	0
SnO₂/NiO-1 NFs	76.79	23.21
SnO₂/NiO-2 NFs	25.46	74.54
SnO₂/NiO-3 NFs	0.51	99.49
SnO₂/NiO-4 NFs	0.08	99.92

Table 1. Relative molar percentages of Ni and Sn in NiO NFs and SnO₂/NiO NFs samples

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Sample	Grain size, D/nm	Grain boundary density, $\delta $/(×10⁹, mm^-2)
SnO₂/NiO-1 NFs	11.1	8.12
SnO₂/NiO-2 NFs	7.4	18.46
SnO₂/NiO-3 NFs	6.3	25.16
SnO₂/NiO-4 NFs	6.3	25.16

Table 2. Respective grain size (D) and grainboundary density (δ) of SnO₂/NiO NFs samples

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Materials	Temperature/ ℃	Response/(100 mg·L^-1)	Ref.
Hierarchical SnO₂	300	24.1	[40]
ZnO-SnO₂ nanofibers	300	18.0	[41]
Horseshoe-shaped SnO₂	225	17.3	[42]
NiO-decorated SnO₂nanorods	300	30.0	[43]
SnO₂/NiO composite nanofibers	160	13.0	This work

Table 3. Comparison of the characteristics of some SnO₂-based ethanol sensors reported in the literature with this work

Yuxing CHU, Hairui LIU, Shuang YAN. Preparation and Gas Sensing Properties of SnO₂/NiO Composite Semiconductor Nanofibers [J]. Journal of Inorganic Materials, 2021, 36(9): 950

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