High performance acetone sensor based on ZnO nanorods modified by Au nanoparticles

Yang, Mingjie; Zhang, Shendan; Qu, Fengdong; Gong, Shuping; Wang, Chenhao; Qiu, Lei; Yang, Minghui; Cheng, Wenlong

doi:10.1016/j.jallcom.2019.05.101

Cited by 76 publications

(30 citation statements)

References 36 publications

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“…demonstrated enhanced sensing performance of an acetone sensor using ZnO nanorods modified by Au nanoparticles. [ 271 ] The presence of metallic Au was verified by XPS which also indicated that electrons transferred from ZnO to Au. Au nanoparticles modified ZnO nanorods improved acetone sensing by 6.6 times compared to pristine ZnO nanorods, with a lower working temperature of 172 °C.…”

Section: Strategies For Enhancement Of Gas Sensing Performancementioning

confidence: 99%

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Yang

Myung

Tran

2021

Adv Elect Materials

133

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While numerous types of gas sensors have been developed for various industries and applications such as the automotive industry, environmental monitoring, and personal safety, nanoscale chemiresistive gas sensors have gained significant research interest due to several advantages such as high sensitivity, low power consumption, and portability. An essential component of these gas sensors is the sensing material where metal oxide semiconductor (MOS) materials are the most prevalent sensing material. Since the adoption of nanoscale synthesis methods for sensing materials development, such as electrospinning and hydrothermal synthesis, many novel 1D MOS‐based nanostructured sensing materials have been demonstrated to enhance gas sensing performance. Overall, nanoengineering approaches and mechanisms for enhancement of gas sensing performance of 1D metal oxide‐based sensing materials are systematically discussed and categorized into several overarching strategies, such as tuning of materials dimension, morphology, and composition. Furthermore, integration of 1D sensing nanomaterials into sensor devices are discussed from the perspective of different chemiresistive sensor architectures and device fabrication methods. Finally, this review also discusses use of 1D MOS materials for emerging and novel electronic nose applications.

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Section: Strategies For Enhancement Of Gas Sensing Performancementioning

confidence: 99%

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Yang

Myung

Tran

2021

Adv Elect Materials

133

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“…Despite significant progress in developing acetone sensing technologies, the sensitivity and detection limits of metal oxide semiconductor gas sensors at low temperatures are only in the range of sub-ppm [ 81 , 82 ]. Further improvements are required to enhance their sensitivity to ppb as well as high selectivity towards the targeted gas, particularly at low temperature and high relative humidity.…”

Section: Health and Medical Monitoringmentioning

confidence: 99%

“…Further improvements are required to enhance their sensitivity to ppb as well as high selectivity towards the targeted gas, particularly at low temperature and high relative humidity. A few materials have met the demands of ppb level detection for healthcare, but they were mostly decorated with noble metals [ 82 ] or incorporated minor metals [ 83 , 84 , 85 , 86 ], which is ideal for practical sensing devices.…”

Section: Health and Medical Monitoringmentioning

confidence: 99%

Nanostructured Gas Sensors: From Air Quality and Environmental Monitoring to Healthcare and Medical Applications

et al. 2021

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In the last decades, nanomaterials have emerged as multifunctional building blocks for the development of next generation sensing technologies for a wide range of industrial sectors including the food industry, environment monitoring, public security, and agricultural production. The use of advanced nanosensing technologies, particularly nanostructured metal-oxide gas sensors, is a promising technique for monitoring low concentrations of gases in complex gas mixtures. However, their poor conductivity and lack of selectivity at room temperature are key barriers to their practical implementation in real world applications. Here, we provide a review of the fundamental mechanisms that have been successfully implemented for reducing the operating temperature of nanostructured materials for low and room temperature gas sensing. The latest advances in the design of efficient architecture for the fabrication of highly performing nanostructured gas sensing technologies for environmental and health monitoring is reviewed in detail. This review is concluded by summarizing achievements and standing challenges with the aim to provide directions for future research in the design and development of low and room temperature nanostructured gas sensing technologies.

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“…The outer diameter of the porous sensing layer is 2R s , and the length of which is L. The target gas diffuses radially into the porous sensing layer and was consumed by the reactions with the adsorbed oxygen. The forming of oxygen anions and the redox reactions between target gas A and the adsorbed oxygen are shown in the following equations [40,41].…”

Section: Problem Descriptionmentioning

confidence: 99%

Gas Sensing Properties of Cobalt Titanate with Multiscale Pore Structure: Experiment and Simulation

Wang

Tao

et al. 2020

Sensors

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A diffusion-reaction coupled model was presented to investigate the effects of multiscale pore structure characteristics on gas sensing properties. A series of CoTiO3 powders with different pore size distributions were fabricated by sol-gel method. Experimental results on cobalt titanate thick films show that a well-defined multiscale pore structure is particularly desired for the improvement of sensing performance, instead of just increasing the specific surface area. The theoretical responses of sensing elements with different pore size distributions were derived and compared with experimental data on CoTiO3 sensors exposed to ethanol. The calculated sensitivities considering the influence of pore size changes were also found to be in agreement with the experimental results. A dimensionless Thiele modulus Th was introduced for assessing the critical point corresponding to the transformation from surface reaction-controlled sensitivity into diffusion-controlled sensitivity.

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High performance acetone sensor based on ZnO nanorods modified by Au nanoparticles

Cited by 76 publications

References 36 publications

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

1D Metal Oxide Semiconductor Materials for Chemiresistive Gas Sensors: A Review

Nanostructured Gas Sensors: From Air Quality and Environmental Monitoring to Healthcare and Medical Applications

Gas Sensing Properties of Cobalt Titanate with Multiscale Pore Structure: Experiment and Simulation

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