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Highly sensitive nh3 density sensor for gis

Highly sensitive nh3 density sensor for gis

May 01, 2011 · It can be seen that the temperature has an obvious influence on the response of sensors to NH 3 gas. The sensor exhibits a highest response at a working temperature of 250 °C, in which the responses are 2.39, 3.12, 3.80, 7.20, and 9.67 for 300, 400, 500, 1000, and 1500 ppm NH 3 concentration, respectively.

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  • High-selective sensitive NH3 gas sensor: A density functional

    Jun 15, 2018 · Highly sensitive resistance variation to 10–500 ppm NH 3 gases was recorded by using Co 3 O 4 hexagonal platelets-based sensing device. According to the response curve, the Co 3 O 4 hexagonal platelets-based sensing device exhibit a high sensitive to 10–500 ppm NH 3 gas at room temperature that is 1.4, 1.7, 2.4, 2.8, and 3.5, respectively (Fig. S3).

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  • Highly Sensitive Flexible NH3 Sensors Based on Printed

    Here, we report a highly sensitive printed ammonia (NH 3) gas sensor based on organic thin film transistors (OTFTs) with fluorinated difluorobenzothiadiazole-dithienosilole polymer (PDFDT). These sensors detected NH 3 down to 1 ppm with high sensitivity (up to 56%) using bar-coated ultrathin (<4 nm) PDFDT layers without using any receptor additives. The sensing mechanism was confirmed by cyclic voltammetry, hydrogen/fluorine nuclear magnetic resonance, and UV/visible absorption spectroscopy.

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  • Ultra-sensitive NH3 sensor based on flower-shaped SnS2

    Jan 05, 2018 · When applied to detect 100 ppm NH 3 at 200 °C, the SnS 2 based sensor exhibited high response value of 7.4, short response/recovery time of 40.6 s/624 s. Moreover, the sensor demonstrated a low detection limit of 0.5 ppm NH 3 and superb selectivity to NH 3 against CO 2, CH 4, H 2, ethanol and acetone.

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  • Highly sensitive thin film NH3 gas sensor operating at room

    Feb 22, 2008 · The SnO 2-based gas sensors can detect NH 3 gas with good sensitivity and response-recovery time, but it only operates at elevated temperatures. In contrast, the CNTs-based sensors can detect NH 3 gas at room temperature, but their sensitivity is still low and response-recovery time is still very long.

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  • (PDF) Silicene as a highly sensitive molecule sensor for NH3

    On the basis of first-principles calculations, we demonstrate the potential application of silicene as a highly sensitive molecule sensor for NH3, NO, and NO2 molecules.

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  • Highly Sensitive and Selective Gas Sensor Using Heteroatom

    Highly Sensitive and Selective Gas Sensor Using Heteroatom Doping Graphdiyne: A DFT Study CH4, HCHO, H2S, SO2, SO3, NO2, NO and NH3). The B-doped GDY (B-GDY) compared with pure or N doped GDY

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  • Toward Highly Sensitive and Energy Efficient Ammonia Gas

    The sensitivity to NH3 can be improved by a sensor based N-doped SWCNTs films while the sensitivity to NO2 and water vapor was unmodified. These unique gas-sensing properties can be used to develop a new NH3-selective differential gas sensor.

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  • Preparing large-scale WO3 nanowire-like structure for high

    May 01, 2011 · It can be seen that the temperature has an obvious influence on the response of sensors to NH 3 gas. The sensor exhibits a highest response at a working temperature of 250 °C, in which the responses are 2.39, 3.12, 3.80, 7.20, and 9.67 for 300, 400, 500, 1000, and 1500 ppm NH 3 concentration, respectively.

    Get Price
  • Highly sensitive sensors for GIS health checks | Think Grid

    Highly sensitive sensors for GIS health checks Extending the life of ageing gas-insulated substations (GIS) requires precise data on their dielectric health from partial discharge monitoring. But the physical and electromagnetic environment is challenging for sensor design.

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  • Colorimetric Gas Sensing with Enhanced Sensitivity

    Jan 01, 2016 · In the last years a rising need for both NH3 and CO sensors could be observed. NH3 detection is especially important in environmental monitoring, process monitoring and the control of perishable goods [4-6]. For example, NH3 monitoring is highly important in pig sties and their vicinity, breath analysis, leakage detection in industrial plants, or during the selective catalytic reduction of NOx in exhaust gases.

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  • Graphene functionalised by laser ablated V2O5 as highly

    Graphene has been recognized as a promising gas sensing material. The response of graphene-based sensors can be radically improved by introducing defects in graphene using, e. g., metal or metal oxide nanoparticles. We have functionalised CVD grown, single layer graphene by applying pulsed laser deposition (PLD) of V2O5 which resulted in a thin V2O5 layer on graphene with average thickness of

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  • Ultrafast and sensitive room temperature NH3 gas sensors

    Ultrafast and sensitive room temperature NH3 gas sensors based on chemically reduced graphene oxide (rGO) are demonstrated in this work. rGO, which was prepared via the reduction of graphene oxide by pyrrole, exhibited excellent responsive sensitivity and selectivity to ammonia (NH3) gas. The high sensing performance of these rGO sensors with

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  • Molybdenum Trioxide (α-MoO3) Nanoribbons for Ultrasensitive

    A highly-sensitive ammonia (NH 3) gas sensor based on molybdenum trioxide nanoribbons was developed in this study. α-MoO 3 nanoribbons (MoO 3 NRs) were successfully synthesized via a hydrothermal method and systematically characterized using various advanced technologies. Following a simple drop-cast process, a high-performance chemiresistive NH 3 sensor was fabricated through the deposition of a MoO 3 NR sensing film onto Au interdigitated electrodes.

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  • High Sensitivity Gas Sensor to Detect SF6 Decomposition

    A highly-sensitive ammonia (NH3) gas sensor based on molybdenum trioxide nanoribbons was developed in this study. α-MoO3 nanoribbons (MoO3 NRs) were successfully synthesized via a hydrothermal

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  • A highly sensitive and selective SnS2 monolayer sensor in

    Request PDF | A highly sensitive and selective SnS2 monolayer sensor in detecting SF6 decomposition gas | A novel 2D material SnS2 with an appropriate bandgap and high mobility, has been

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  • Highly Sensitive Flexible NH3 Sensors Based on Printed

    Feb 06, 2017 · Here, we report a highly sensitive printed ammonia (NH3) gas sensor based on organic thin film transistors (OTFTs) with fluorinated difluorobenzothiadiazole-dithienosilole polymer (PDFDT). These sensors detected NH3 down to 1 ppm with high sensitivity (up to 56%) using bar-coated ultrathin (< 4 nm) PDFDT layers without using any receptor additives.

    Get Price
  • Tungsten oxysulfide nanosheets for highly sensitive and

    Furthermore, density functional theory (DFT) calculations were performed to elucidate the enhanced ammonia sensing mechanism, evidencing the greater charge transfer and higher NH 3 absorption energy (−0.258 eV) of WS 2 |O compared to those of WS 2 (−0.172 eV) and WO 3 (−0.170 eV). The strategy of incorporating nonmetallic elements developed here may have great potential for tuning the electronic states of materials towards advanced gas sensors.

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  • Adsorption of H2O, NH3, CO, NO2, and NO on graphene: A first

    The good sensor properties of carbon nanotubes are al-ready known for some time,4 but recently, the possibility to use graphene as a highly sensitive gas sensor was also reported.5 It was shown that the increase in graphene charge carrier concentration induced by adsorbed gas molecules can be used to make highly sensitive sensors, even with the

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  • (PDF) Multi-Walled Carbon Nanotubes on Plastic NH3 Gas Sensor

    A sensitive, selective and reliable sensing techniques for ammonia (NH3) gas detection have been highly demanded since NH3 is both a commonly utilized gas in various industrial sectors, and

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  • (PDF) A comparative study on the NH3 gas-sensing properties

    Although ZnO, SnO2 and WO3 materials have been developed into highly sensitive sensors that respond to a variety of gases such as ethanol [15–17], H2 [18], CO [19], NO2 [20,21], and H2S [21], and NH3 [22,23], the NH3 gas-sensing properties of these materials under nanowires-structures have not been fully explored.

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  • Graphene functionalised by laser-ablated V2O5 for a highly

    Graphene functionalised by laser-ablated V2O5 for a highly sensitive NH3 sensor Graphene has been recognized as a promising gas sensing material. The response of graphene-based sensors can be radically improved by introducing defects in graphene using, for example, metal or metal oxide nanoparticles.

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  • GG-NH3-EXP AMMONIA GAS SENSOR

    The standard detection range of the GG-NH3-EXP provides real-time continuous monitoring of ammonia concentrations accurately down to 5% of full-scale without false alarms. We typically recommend a 0-250 ppm range for mechanical room applications. Other ranges (0-100, 0-300, 0-500, 0-1000) are also available.

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  • Highly Sensitive NH3 Sensors Using CVD and Epitaxial Graphene

    sensors after deposition (by 4 to 6 times). Again, th e improvement of the response and recovery speed was more drastic for the SiC/EG sensor. Enhancement of gas response can be caused by increased density of energetically favourable adsorption sites or/and increased charge transfer from NH3 adsorbate molecules [4].

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  • [1608.07508] Highly Sensitive Gas Sensors Based on Silicene

    Aug 26, 2016 · In addition, CO and NH3 are chemisorbed on SiNRs with moderate adsorption energy, alluding to its suitability as a highly sensitive gas sensor. The quantum conductance is detectably modulated by chemisorption of gas molecules which can be attributed to the charge transfer from the gas molecule to the SiNR.

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  • Analytical Prediction of Highly Sensitive CNT-FET-Based

    Jan 10, 2020 · Analytical Prediction of Highly Sensitive CNT-FET-Based Sensor Performance for Detection of Gas Molecules Abstract: In this study, a set of new analytical models to predict and investigate the impacts of gas adsorption on the electronic band structure and electrical transport properties of the single-wall carbon nanotube field-effect transistor

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  • (PDF) Point defects assisted NH3 gas sensing properties in

    The response magnitude of the 1-D ZnO nanostructures was calculated by the following standard equation.Response magnitude (%) = R air − R gas R air × 100(1)The response and recovery times of a sensor were defined as the time taken for reaching the sensors output to 90% of the equilibrium value after injecting and removing the testing gas

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  • Detection of Ammonia Slip Using NOx Sensor Signal Processing

    For robust SCR control, it is useful to know the SCR outlet NOX NH3 emissions such that the control model can be accurately corrected. The current production NOx sensor is cross-sensitive to NH3. Therefore, it provides noisy feedback to the control algorithm. Presented are some signal processing observations which can help to provide

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  • Molybdenum disulfide nanoparticles decorated reduced graphene

    sensors based on rGO film and rGo/MoS2 hybrid film Xian Li, Jing Wang, Dan Xie et al.-Ultrafast and sensitive room temperature NH3 gas sensors based on chemically reduced graphene oxide Nantao Hu, Zhi Yang, Yanyan Wang et al.-Recent citations Enhanced adsorption sites in monolayer MoS2 pyramid structures for highly sensitive and fast hydrogen

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