Ultrasensitive and low detection limit of acetone gas sensor based on W-doped NiO hierarchical nanostructure

Wang, Chen; Liu, Jiangyang; Yang, Qiuyue; Sun, Peng; Gao, Yuan; Liu, Fengmin; Zheng, Jie; Lu, Geyu

doi:10.1016/j.snb.2015.05.037

Cited by 138 publications

(50 citation statements)

References 47 publications

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“…metal chlorides, sulfates, nitrates and acetates. For 2D-in-3D hierarchical architectures, the metal oxide may grow in the desired structure spontaneously [33][34][35][36][37] or structure-directing agents such as cetyltrimethylammoniumbromide [38][39][40][41], glycerol [39,42], hexamethylenetetramine [23,[43][44][45], polyvinylpyrrolidone [2,40,46,47], urea [25,40,48,49], sodiumdodecylsulfate [50][51][52] or polyethyleneglycol [52][53][54][55] can be added. Also, seed layers may be employed to initiate growth [23,24,43,44,56] and occasionally microwave-assisted procedures are used [57,58].…”

Section: Synthesis Of 2d Nanoflakesmentioning

confidence: 99%

2D metal oxide nanoflakes for sensing applications: Review and perspective

Dral

Elshof

2018

Sensors and Actuators B: Chemical

121

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In this review the state of the art and future prospects of 2-dimensional (2D) metal oxide nanoflakes used as active sensing elements for the detection of solutes, gases and radiation are discussed. 2D material geometries are particularly interesting for sensing applications because they provide large specific surface areas and are suitable for crystal facet engineering. In addition, unique material properties of atomically thin nanosheets due to quantum size effects provide engineering possibilities beyond the realm of their bulk counterparts. A variety of possibilities in materials, synthesis routes, (hierarchical) sensor architectures and application areas is sketched. The discussion is focused on high-performing sensors and innovative concepts. The scope is limited to nanoflakes with a thickness of up to 50 nm. Special attention is given to sensing based on material properties that are unique to atomically thin nanosheets.

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Section: Synthesis Of 2d Nanoflakesmentioning

confidence: 99%

2D metal oxide nanoflakes for sensing applications: Review and perspective

Dral

Elshof

2018

Sensors and Actuators B: Chemical

121

View full text Add to dashboard Cite

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“…The relationship between the gas concentration (C g ) and the gas response (S g ) can be written according to the gas absorption model of semiconductors as follows (Eq. (1)) [47,48]:…”

Section: Vocs Sensing Propertiesmentioning

confidence: 99%

ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection

Vessalli

Zito

Perfecto

et al. 2017

Journal of Alloys and Compounds

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a b s t r a c tGraphene-based composites have emerged as gas sensor due to the possibility to obtain higher surface area with additional functional groups. In this paper, ZnO nanorods (ZnO-NR) with controlled size and morphology were grown via chemical bath deposition in mild temperature (90 C) over gold interdigital tracks deposited on an alumina substrate. Furthermore, it was also possible to obtain by the same method composites with graphene oxide sheets below ZnO-NR structures (GO/ZnO-NR) or ZnO-NR between GO sheets (GO/ZnO-NR/GO) when GO is placed in the bath during the growth of GO/ZnO-NR. The samples were characterized by Raman spectroscopy, scanning electron microscopy, and energy dispersive X-ray spectroscopy. These structures were tested as sensors of volatile organic compounds (VOCs), such as acetone, benzene, ethanol and methanol in the concentration range of 10e500 parts per million (ppm). It was found that the optimum working temperature of all sensors was 450 C. The GO/ ZnO-NR/GO composite showed better selectivity due to GO functional groups. In the case of our welldesigned sensors, we found that the dominant oxygen species (O 2-) on ZnO-NR surface were responsible for the sensors response. These findings offer a new viewpoint for further advance of the sensing performance of one-dimensional ZnO/GO nanocomposites VOCs sensors.

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“…Although MOX based resistance-type gas sensors have been extensively reported, a high working temperature is needed to realize a conspicuous response. 24,47,48 The decreased conductivity of the NiO NPs would enhance the working frequency. The frequency shifts induced by the examined gases such as H 2 , CH 4 , H 2 S, and NH 3 were negligible.…”

Section: Resultsmentioning

confidence: 99%

Enhanced sensitivity of a GHz surface acoustic wave humidity sensor based on Ni(SO₄)_0.3(OH)_1.4 nanobelts and NiO nanoparticles

et al. 2015

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Ni(SO 4 ) 0.3 (OH) 1.4 nanobelts (NSOH NBs) and NiO nanoparticles (NPs) were used as the sensitive layers for a surface acoustic wave (SAW) humidity sensor. A high frequency SAW resonator up to 1.54 GHz was fabricated on a lithium niobate substrate as the sensing platform. The SAW sensors based on the NSOH NBs and the NiO NPs exhibited significantly decreased resonant frequencies with enhanced relative humidity (RH) from 11% to 85%, and the frequency response was found to be :2.95 MHz and :5.81 MHz, respectively. Both sensors showed rapid and reversible responses with excellent repeatability and long-term stability. The response and recovery times for NiO NPs were 23 s and 4 s, respectively. The NiO NP based sensor also showed negligible interference with various gases such as hydrogen and methane, demonstrating good cross-selectivity even while working in the GHz range. The high performance could be ascribed to the enhancement of the resonant frequency and the use of hydrophilic nanomaterials with a high surface-to-volume ratio.

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Ultrasensitive and low detection limit of acetone gas sensor based on W-doped NiO hierarchical nanostructure

Cited by 138 publications

References 47 publications

2D metal oxide nanoflakes for sensing applications: Review and perspective

2D metal oxide nanoflakes for sensing applications: Review and perspective

ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection

Enhanced sensitivity of a GHz surface acoustic wave humidity sensor based on Ni(SO₄)_0.3(OH)_1.4 nanobelts and NiO nanoparticles

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Ultrasensitive and low detection limit of acetone gas sensor based on W-doped NiO hierarchical nanostructure

Cited by 138 publications

References 47 publications

2D metal oxide nanoflakes for sensing applications: Review and perspective

2D metal oxide nanoflakes for sensing applications: Review and perspective

ZnO nanorods/graphene oxide sheets prepared by chemical bath deposition for volatile organic compounds detection

Enhanced sensitivity of a GHz surface acoustic wave humidity sensor based on Ni(SO4)0.3(OH)1.4 nanobelts and NiO nanoparticles

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Enhanced sensitivity of a GHz surface acoustic wave humidity sensor based on Ni(SO₄)_0.3(OH)_1.4 nanobelts and NiO nanoparticles