Low concentration NO gas sensing under ambient environment using Cu2O nanoparticle modified ZnO nanowires

Hong, Li-Yang; Ke, Hsien-Wen; Tsai, Cheng-En; Lin, Heh‐Nan

doi:10.1016/j.matlet.2016.08.028

Cited by 17 publications

(2 citation statements)

References 19 publications

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“…The sensing performance was excellent compared to other reported NO sensors in recent literature as illustrated in Figure S14 (Supporting Information), and the detailed sensing properties are summarized in Table S2 (Supporting Information). [51][52][53][54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70] As shown in Figure S15 (Supporting Information), the device's transfer and output characteristics at different NO concentrations ranging from 0 to 50 ppm were recorded to highlight the relationship between the gas interaction and transistor parameters. According to the transfer characteristics shown in Figure S15a (Supporting Information), a significant positive threshold shift from −10 to +15 V was observed, and the drain current increased from 5 to 15 µA when the NO gas concentration increased.…”

Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Conductive Metal−Organic Frameworks Nanotubes for Ultrahigh‐Performance Flexible NO Sensors

Wang

Chen

et al. 2022

Small Methods

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Additionally, the number of Cu 2c (the Cu 2c in the crystal defects bound with two S atoms) in the Cu-BHT structure is the primary factor affecting the Cu-BHT-based sensing devices' performance. [6,17] However, the Cu-BHT's crystal structure makes its specific surface smaller than that of the conventional metal-organic frameworks, which significantly affects its application in electrocatalysts and sensors. Thus, the preparation of Cu-BHT with a large surface area and abundant Cu 2c on the surface is a crucial factor in improving the performance of Cu-BHT-based devices.Gaseous pollutants, emitted by car engines or other combustion processes, are attracting attention because of their threat to the human body, such as physiological dysfunctions, chronic bronchitis, and lung cancer. [18][19][20][21][22][23][24][25][26][27][28] Consequently, various materials have been utilized to detect toxic gases, such as metal oxide semiconductors, [29,30] MXene/noble metal, [31][32][33][34] ion-conducting hydrogels, and organohydrogels. [35,36] Among gaseous pollutants, nitric oxide (NO), as a marker for airway inflammations, plays a major role in biological functions and pathological processes. [37,38] Measurement of exhaled NO has applications in diagnosing and monitoring inflammation, and the information obtained can be used as a tool for managing asthma treatment. Therefore, developing sensors to detect NO gas is critical for diagnosing and monitoring an asthma patient or ambient monitoring.Among different types of NO gas sensors, organic field-effect transistor (OFET) based sensors are increasingly attracting attention owing to their gate-induced tunable channel conductivities, amplification effects, concurrent actualization of processing, memory functions, miniaturized size, solution processing, and low power consumption. [39,40] Alternatively, many parameters, such as transport mobility (μ), threshold voltage (V Th ), current on/off ratio (I on /I off ), and subthreshold swing (SS), can be characterized the gas-sensing performance in a sensor based on an OFET device. In addition, the electronic properties of the semiconductor materials can be flexibly tuned to improve specificity. [41] However, due to the weak affinity with NO gas, the OFET device's sensitivity to detect NO gas was limited. Recently, the formation of heterostructure is known to be a promising strategy to enhance sensitivity and improve selectivity of gas sensing. [42][43][44] Cu-benzenehexathiol (Cu-BHT) has attracted significant attention due to its record high electrical conductivity and crystal defects Cu 2c . However, the nonporous structure and small specific surface area of Cu-BHT with twodimensional kagome lattice invariably limit its practical application in sensing and catalysis. In this work, Cu-BHT nanotubes (Cu-BHT-NTs) are designed and prepared via a facile homogeneous reaction to solve these problems. Compared with the traditional nanorod-like structure, the Cu-BHT-NTs not only have a higher specific surface area but also possess a higher pro...

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Section: Resultsmentioning

confidence: 99%

Facile Synthesis of Conductive Metal−Organic Frameworks Nanotubes for Ultrahigh‐Performance Flexible NO Sensors

Wang

Chen

et al. 2022

Small Methods

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“…Among the MOSs, cuprous oxide (Cu 2 O) as a p-type semiconductor with a wide direct band gap [2.17 eV] and high conductivity was widely applied in gas sensing detection [17]. Meanwhile, due to the unique properties of Cu 2 O with lower resistivity and multiple surface defects has become a material of interest for gas sensors [18,19]. Zhou et al have successfully synthesized the hollow dodecahedral Cu 2 O nanocages with a low detection limit at 100 ppm at temperatures around 250 8C [20].…”

Section: Introductionmentioning

confidence: 99%

Ultra-low concentration detection of NH3 using rGO/Cu2O nanocomposites at low temperature

Sima

Song

et al. 2021

J Mater Sci: Mater Electron

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It has been a major challenge to develop a gas sensor capable of detecting ppblevel ammonia (NH 3 ) with high response at low temperature. Herein, Cu 2 O nanoblocks uniformly dispersed on wrinkle structure of reduced graphene oxide (rGO)-based nanocomposites synthesized via a water bath heating method. Characterizations results illustrate that Cu 2 O nanoblocks are evenly dispersed on the surface of rGO. Additionally, The gas sensing experiments displayed that the as-obtained rGO/Cu 2 O nanocomposites exhibited the extremely fast response (1s) and recovery time (1s), high-performance gas sensing property for ultra-low concentration (5 ppb) NH 3 detections at low temperature (80 °C), which owe to the mesoporous structure, excellent charge carriers transport properties and large specific surface area. Meanwhile, the probable enhancing mechanism of rGO/Cu 2 O nanocomposites was discussed as well. Therefore, it is expected that rGO/Cu 2 O nanocomposites with remarkable sensing performance for the future development in monitoring and detecting NH 3 at low temperature.

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Synthesis and characterization of zinc oxide prepared with ammonium hydroxide and photocatalytic application of organic dye under ultraviolet illumination

2017

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Low concentration NO gas sensing under ambient environment using Cu2O nanoparticle modified ZnO nanowires

Cited by 17 publications

References 19 publications

Facile Synthesis of Conductive Metal−Organic Frameworks Nanotubes for Ultrahigh‐Performance Flexible NO Sensors

Facile Synthesis of Conductive Metal−Organic Frameworks Nanotubes for Ultrahigh‐Performance Flexible NO Sensors

Ultra-low concentration detection of NH3 using rGO/Cu2O nanocomposites at low temperature

Synthesis and characterization of zinc oxide prepared with ammonium hydroxide and photocatalytic application of organic dye under ultraviolet illumination

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