Design of highly porous SnO2-CuO nanotubes for enhancing H2S gas sensor performance

Park, Kee-Ryung; Cho, Hong‐Baek; Lee, Jimin; Song, Yoseb; Kim, Woo‐Byoung; Choa, Yong‐Ho

doi:10.1016/j.snb.2019.127179

Cited by 194 publications

(77 citation statements)

References 29 publications

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“…Moreover, providing a cost-effective fabrication process for industrial perspectives should be considered. Various nanostructures, namely nanoparticles (NPs) [19,20], nanotubes (NTs) [21,22], nanowires (NWs) [23,24], and nanosheets (NSHs) [25,26], show good sensitivity to the different gases. Among all these nanostructures, silicon nanowires (SiNWs) have demonstrated substantial advantages due to their need for relatively standard processing techniques, which allows for integration with standard complementary metal oxide semiconductor (CMOS) processes for very large scale production [27,28].…”

Section: Introductionmentioning

confidence: 99%

Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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The unique electronic properties of semiconductor nanowires, in particular silicon nanowires (SiNWs), are attractive for the label-free, real-time, and sensitive detection of various gases. Therefore, over the past two decades, extensive efforts have been made to study the gas sensing function of NWs. This review article presents the recent developments related to the applications of SiNWs for gas sensing. The content begins with the two basic synthesis approaches (top-down and bottom-up) whereby the advantages and disadvantages of each approach have been discussed. Afterwards, the basic sensing mechanism of SiNWs for both resistor and field effect transistor designs have been briefly described whereby the sensitivity and selectivity to gases after different functionalization methods have been further presented. In the final words, the challenges and future opportunities of SiNWs for gas sensing have been discussed.

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Section: Introductionmentioning

confidence: 99%

Silicon Nanowires for Gas Sensing: A Review

et al. 2020

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“…SnO 2 is a typical wide band-gap (Eg = 3.6 eV) n-type semiconductor and has been widely used in the gas sensor field owing to the advantage of its low cost, stable electrical properties, excellent physical and chemical stability and unique optical performance [1][2][3]. However, pure SnO 2 gas sensors have several limitations such as poor selectivity [4], slow recovery [5] and high working temperature [6]. To date, many researchers have taken measures to improve its gas sensing performance, such as doping various elements and compositing several sensing materials [7,8].…”

Section: Introductionmentioning

confidence: 99%

A Simple Dip-Coating Method of SnO2-NiO Composite Thin Film on a Ceramic Tube Substrate for Methanol Sensing

Wang

et al. 2019

Crystals

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In this work, SnO2-NiO composite thin film was successfully grown on a ceramic tube substrate directly by a simple dip-coating method combined with annealing. Characterization analysis demonstrates that uniform SnO2 film consists of a great number of nanospheres and NiO grows on SnO2 as an agglomerated block. In comparison to the pure SnO2 sample, the SnO2-NiO composite thin films gas sensor exhibits superior methanol sensing properties at 225 °C. The gas response to 10 ppm methanol reached 15.12 and the response and recovery times were 8 s and 7 s, respectively. The excellent selectivity and recovery rate are explained by the unique properties of the NiO semiconductor and the higher sensor response is attributed to the pivotal heterojunction effect.

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“…This is because they have a substantial surface area for gaseous species along with numerous nanograins and extensive grain boundary areas, which confirms the improved sensitivity of the sensors with NF-type morphology [55,56]. In an interesting study, Park et al [57] synthesized hollow porous SnO 2 -CuO NF mats using electrospinning and a thermal processing approach and applied them in H 2 S sensors. The sensing mechanism was based on the development of CuS on the SnO 2 -CuO surface as follows [57]:…”

Section: Cu X O Nanocomposite-based Gas Sensorsmentioning

confidence: 85%

CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

et al. 2021

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H2S gas is a toxic and hazardous byproduct of the oil and gas industries. It paralyzes the olfactory nerves, with concentrations above 100 ppm, resulting in loss of smell; prolonged inhalation may even cause death. One of the most important semiconducting metal oxides for the detection of H2S is CuxO (x = 1, 2), which is converted to CuxS upon exposure to H2S, leading to a remarkable modulation in the resistance and appearance of an electrical sensing signal. In this review, various morphologies of CuxO in the pristine form, composites of CuxO with other materials, and decoration/doping of noble metals on CuxO nanostructures for the reliable detection of H2S gas are thoroughly discussed. With an emphasis to the detection mechanism of CuxO-based gas sensors, this review presents findings that are of considerable value as a reference.

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Design of highly porous SnO2-CuO nanotubes for enhancing H2S gas sensor performance

Cited by 194 publications

References 29 publications

Silicon Nanowires for Gas Sensing: A Review

Silicon Nanowires for Gas Sensing: A Review

A Simple Dip-Coating Method of SnO2-NiO Composite Thin Film on a Ceramic Tube Substrate for Methanol Sensing

CuxO Nanostructure-Based Gas Sensors for H2S Detection: An Overview

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