Aerobic and anaerobic H2 sensing sensors fabricated by diffusion membranes depositing on Pt-ZnO film

Du, Yan; Gao, Shi; Mao, Zhenghao; Zhang, Chunlei; Zhao, Qifan; Zhang, Shunping

doi:10.1016/j.snb.2017.06.005

Cited by 19 publications

(5 citation statements)

References 31 publications

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“…Relative to ZnSe and ZnO, the ZnSe/ZnO heterojunction-based sensor exhibits a much higher response ( R s = 10.42), which is approximately 7.3 times higher than that of ZnO-based sensor ( R s = 1.43). ZnO typically has a favorable response to various gases, such as NO 2 , CO, H 2 , and alcohols, at temperatures above 300 °C. − Therefore, the significantly reduced working temperature when the ZnSe/ZnO heterojunctions were introduced could be due to the enhanced electron concentrations within the Debye region, which are transferred from ZnSe.…”

Section: Resultsmentioning

confidence: 99%

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Liu

2019

ACS Appl. Mater. Interfaces

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Mesoporous ZnSe/ZnO heterojunctions were prepared by the in situ thermal oxidation of ZnSe at elevated temperatures in air. The partial replacement of selenium by oxygen in the ZnSe nanoflakes led to a highly porous microstructure with 8.2 nm mesopores distributed fairly uniformly within the formed heterojunction sample. The as-fabricated mesoporous ZnSe/ZnO heterojunction-based sensor exhibits an approximately 7.3-fold significantly higher response than those of both pristine ZnO- and ZnSe-based sensors when exposed to 8 ppm NO2 at 200 °C. This sensor also demonstrates excellent selectivity for methanol, ethanol, acetone, benzene, methylbenzene, ammonia, and formaldehyde. The significantly enhanced response of the ZnSe/ZnO-based sensor is due to the mesoporous microstructure during thermal oxidation of ZnSe to ZnO, yielding more active sites and the accumulation of electrons in the ZnO nanocrystals transferred between ZnSe/ZnO interfaces.

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Section: Resultsmentioning

confidence: 99%

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Liu

2019

ACS Appl. Mater. Interfaces

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“…The performance indicators of the platform were as follows. The measurement range of resistance was 100 Ω–1 GΩ with an error less than 5% [ 24 , 25 , 26 , 27 ]. The resistance acquisition rate of each channel was more than 2 Hz.…”

Section: Combinatorial and High-throughput Technique For Screeningmentioning

confidence: 99%

A Set of Platforms with Combinatorial and High-Throughput Technique for Gas Sensing, from Material to Device and to System

et al. 2018

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In a new E-nose development, the sensor array needs to be optimized to have enough sensitivity and selectivity for gas/odor classification in the application. The development process includes the preparation of gas sensitive materials, gas sensor fabrication, array optimization, sensor array package and E-nose system integration, which would take a long time to complete. A set of platforms including a gas sensing film parallel synthesis platform, high-throughput gas sensing unmanned testing platform and a handheld wireless E-nose system were presented in this paper to improve the efficiency of a new E-nose development. Inkjet printing was used to parallel synthesize sensor libraries (400 sensors can be prepared each time). For gas sensor selection and array optimization, a high-throughput unmanned testing platform was designed and fabricated for gas sensing measurements of more than 1000 materials synchronously. The structures of a handheld wireless E-nose system with low power were presented in detail. Using the proposed hardware platforms, a new E-nose development might only take one week.

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“…Therefore, a reliable and effective sensor that can alarm hydrogen leakage at room temperature is very important for enterprise safety production. Because of this, extensive research has been carried out in the past decades to develop hydrogen sensors with high reliability, rapid response and excellent performance [2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Aging and Heat-treatment of Room-temperature Hydrogen Sensitive Pt-WO₃ Composite Nanoceramics

Huang

et al. 2023

J. Phys.: Conf. Ser.

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Pt-WO3 composite nanoceramic produced by pressed and sintered with 5 wt% Pt and WO3 nanoparticles has a response multiple of about 80 for 800 ppm H2-20% O2-N2 and a response multiple of about 10 for 100 ppm H2-20% O2-N2 at room temperature of 40 relative humidity(RH), showing an impressive sensing capacity for low concentration hydrogen. However, Pt-WO3 composite nanoceramic will show the aging phenomenon mainly with the rapid decline of recovery rate in the open air, which limits its application in practical equipment. Fortunately, Pt-WO3 composite nanoceramic can be reactivated by heat treatment at 200°C for 1 h, thus restoring its pre-aging hydrogen sensitivity capacity. This may be because heat treatment refixed some weak-bonds Pt particles to the original site.

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Aerobic and anaerobic H2 sensing sensors fabricated by diffusion membranes depositing on Pt-ZnO film

Cited by 19 publications

References 31 publications

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

A Set of Platforms with Combinatorial and High-Throughput Technique for Gas Sensing, from Material to Device and to System

Aging and Heat-treatment of Room-temperature Hydrogen Sensitive Pt-WO₃ Composite Nanoceramics

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Aerobic and anaerobic H2 sensing sensors fabricated by diffusion membranes depositing on Pt-ZnO film

Cited by 19 publications

References 31 publications

Ultrasensitive NO2 Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Ultrasensitive NO2 Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

A Set of Platforms with Combinatorial and High-Throughput Technique for Gas Sensing, from Material to Device and to System

Aging and Heat-treatment of Room-temperature Hydrogen Sensitive Pt-WO3 Composite Nanoceramics

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Product

Resources

About

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Ultrasensitive NO₂ Detection Utilizing Mesoporous ZnSe/ZnO Heterojunction-Based Chemiresistive-Type Sensors

Aging and Heat-treatment of Room-temperature Hydrogen Sensitive Pt-WO₃ Composite Nanoceramics