Highly sensitive thin film NH3 gas sensor operating at room temperature based on SnO2/MWCNTs composite

Hieu, Nguyen Van; Thuy, Luong Thi Bich; Chien, Nguyen Duc

doi:10.1016/j.snb.2007.09.088

Cited by 214 publications

(78 citation statements)

References 46 publications

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“…Eventually, the response is enhanced due to the ampli cation e ects of junction structure combined with the surface reactions of the target gas. This phenomenon has been observed and reported by other groups [30,31]. However, the exact mechanism of sensing has not been fully understood yet and needs further investigations.…”

Section: The Sensing Propertiessupporting

confidence: 76%

Graphene oxide/SnO2 Nanocomposite as Sensing Material for Breathalyzers: Selective Detection of Ethanol in the presence of Automotive CO and Hydrocarbons Emissions

et al. 2017

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Abstract. SnO 2 was ultrasonically deposited (precipitated) in the presence of di erent amounts of graphene oxide (GO) prepared by the modi ed Hummers' method. The resulting nanocomposites were used as sensing material for the detection of 1000 ppm CO and VOCs including ethanol, acetone and toluene, and CH 4 in a temperature range of 150-300 C. The nanocomposites were characterized by Raman spectroscopy, XRD, BET surface area measurement, FT-IR, and SEM methods. It seems that SnO 2 layers were deposited on the GO surface and incorporated into the matrix. This resulted in 47% increase in the nanocomposite BET surface area. The addition of 0.1 wt% GO to SnO2 increased the response to CO by about 6 times at 300 C. 0.05 wt% GO as an optimum amount was included in SnO2 up to 2-fold enhancement in response to ethanol, and toluene was observed. At 250 C, the highest response to ethanol was obtained, which is 120, 114, 1400, and 15 times larger than the responses to CO, toluene, methane and acetone, respectively, making the sensors quite selective to ethanol. Furthermore, this sensor exhibited good response in the low concentration of ethanol.

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Section: The Sensing Propertiessupporting

confidence: 76%

Graphene oxide/SnO2 Nanocomposite as Sensing Material for Breathalyzers: Selective Detection of Ethanol in the presence of Automotive CO and Hydrocarbons Emissions

et al. 2017

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“…Similar to core/shell heterostructures like MOS/CdS, CNT/MOS hybrids have shown improved photoluminescent quantum efficiencies and enhanced gas-sensing properties including reduced response and recovery times [163,222]. So far, CNT/SnO 2 has been tested for detection of CO [172], NO 2 [201,203], NH 3 [223], formaldehyde [224], and ethanol [225]. Wei et al used a sol-gel process to coat pristine SWCNTs with SnO 2 and investigated the gassensing performance for NO 2 at room temperature [165].…”

Section: Electrocatalysismentioning

confidence: 99%

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

Hu¹,

Guo²

2011

Carbon Nanotubes - Growth and Applications

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“…Meanwhile, pure metal oxide structures react on FA at higher operating temperatures (300-400 • C) (Xu et al, 2014;Park et al, 2014) or room temperature with the assistance of UV LEDs (Chung et al, 2014;Li et al, 2015). Nanomaterials, such as carbon nanotubes (CNTs), metaloxide nanoparticles, nanotubes, nanowires and other various nanopattern formations are widely used in gas sensing structures due to their excellent responsive characteristics, mature preparation technology and low cost of mass production (Aroutiounian, 2015;Arafat et al, 2012;Korotcenkov et al, 2009;Aroutiounian et al, 2013;Feyzabad et al, 2012;Hieu et al, 2008). When CNTs' walls are covered with metal-oxide nanoparticles, the specific surface area of sensitive gas material enlarges.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

Adamyan

Sayunts

Aroutiounian

et al. 2018

J. Sens. Sens. Syst.

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Abstract. The results of research works related to the study of thick-film multiwall carbon nanotube-tin oxide nanocomposite sensors of propylene glycol (PG), dimethylformamide (DMF) and formaldehyde (FA) vapors are presented in this paper. These sensors were derived using hydrothermal synthesis and sol-gel methods. Investigations of response-recovery characteristics in the 50-300 • C operating temperature range reveal that the optimal operating temperature for PG, DMF and FA vapor sensors, taking into account both high response and acceptable response and recovery times are about 200 and 220 • C, respectively. The dependence of the sensor response on gas concentration is linear in all cases. Minimal propylene glycol, dimethylformamide and formaldehyde gas concentrations, where the perceptible signal was noticed, were 13, 5 and 115 ppm, respectively.

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Highly sensitive thin film NH3 gas sensor operating at room temperature based on SnO2/MWCNTs composite

Cited by 214 publications

References 46 publications

Graphene oxide/SnO2 Nanocomposite as Sensing Material for Breathalyzers: Selective Detection of Ethanol in the presence of Automotive CO and Hydrocarbons Emissions

Graphene oxide/SnO2 Nanocomposite as Sensing Material for Breathalyzers: Selective Detection of Ethanol in the presence of Automotive CO and Hydrocarbons Emissions

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

Nanocomposite sensors of propylene glycol, dimethylformamide and formaldehyde vapors

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