Journal ArticleDOI
PdPt Bimetal-Functionalized SnO2 Nanosheets: Controllable Synthesis and its Dual Selectivity for Detection of Carbon Monoxide and Methane.
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TLDR
It is demonstrated that bimetal NPs with special structure and component can significantly improve the gas sensing performance of metal oxide semiconductor (MOS) and the obtained sensor has great potential in monitoring coal mine gas.Abstract:
Bimetallic nanoparticles (NPs) usually exhibit some novel properties due to the synergistic effects of the two distinct metals, which is expected to play an important role in the field of gas sensing. PdPt bimetal NPs with Pd-rich shell and Pt-rich core were successfully synthesized and used to modify SnO2 nanosheets. The 1P-PdPt/SnO2-A sensor obtained by self-assemblies of PdPt NPs exhibited temperature-dependent dual selectivity to CO at 100 °C and CH4 at 320 °C. Furthermore, the sensor possessed good long term stability and antihumidity interference. The activation energy of adsorption for CO and CH4 were estimated by the temperature-dependent response process modeled using Langmuir adsorption kinetics, which proved that the lower activation energy of adsorption corresponded to better sensing performance. The gas-sensing mechanism based on the diffusion depth of the tested gas in the sensing layer was discussed. The dramatically improved sensing performance could be ascribed to the high catalytic activity of PdPt bimetal, the electron sensitization of PdO, and Schottky barrier-type junctions at the interface between SnO2 and PdPt NPs. Our present results demonstrate that bimetal NPs with special structure and components can significantly improve the gas-sensing performance of metal oxide semiconductor and the obtained sensor has great potential in monitoring coal mine gas.read more
Citations
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Nanomaterial-based gas sensors used for breath diagnosis.
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Metal-organic frameworks for QCM-based gas sensors: A review
TL;DR: In this article, a review of the application of metal-organic frameworks (MOFs) and MOF-based materials in gas monitoring based on QCM is presented, and future perspectives and challenges faced by MOFs in gas sensing are discussed.
Journal ArticleDOI
Highly flexible and conductive poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate) anchored 3-dimensional porous graphene network-based electrochemical biosensor for glucose and pH detection in human perspiration
Abu Zahed,Sharat Chandra Barman,Partha Sarati Das,Sharifuzzaman,Hyosang Yoon,Sanghyuk Yoon,Jae Yeong Park +6 more
TL;DR: The fabrication of a flexible electrochemical biosensor based on poly (3, 4-ethylene dioxythiophene)-poly (styrene sulfonate) modified 3D stable porous laser-induced graphene (LIG) for the detection of glucose and pH is reported, validates the utility of the novel fabrication procedure, and the potential of the LIG-conductive polymer composite for biosensing applications.
Journal ArticleDOI
Synthesis of Pd nanoparticle-decorated SnO2 nanowires and determination of the optimum quantity of Pd nanoparticles for highly sensitive and selective hydrogen gas sensor
Zhicheng Cai,Sunghoon Park +1 more
TL;DR: In this paper, a Pd nanoparticle-decorated SnO2 nanowires were synthesized to fabricate a highly selective and sensitive hydrogen gas sensor, which exhibited similar sensing responses to several gases.
Journal ArticleDOI
High selectivity of Ag-doped Fe2O3 hollow nanofibers in H2S detection at room operating temperature
Chengyu Yang,Ying Yang,Chengxin Zhang,Hui Yu,Tingting Wang,Keying Shi,Zhuanfang Zhang,Dongjie Wang,Xiangting Dong +8 more
TL;DR: In this article, a simple method to synthesize Ag-doped Fe2O3 hollow nanofibers by electrospinning was reported, and the synthesized samples were fabricated into gas sensors, and their sensing properties were studied systematically.
References
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Journal ArticleDOI
Highly sensitive and selective gas sensors using p-type oxide semiconductors: Overview
Hyo Joong Kim,Jong Heun Lee +1 more
TL;DR: In this article, high performance gas sensors prepared using p-type oxide semiconductors such as NiO, CuO, Cr2O3, Co3O4, and Mn3O3 were reviewed.
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New approaches for improving semiconductor gas sensors
TL;DR: In this paper, the authors demonstrated that the sensing characteristics of a semiconductor gas sensor using SnO2 can be improved by controlling fundamental factors which affect its receptor and transducer functions.
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Oxide semiconductor gas sensors
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Bimetallic Nanocrystals: Liquid‐Phase Synthesis and Catalytic Applications
Dingsheng Wang,Yadong Li +1 more
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Theory of gas-diffusion controlled sensitivity for thin film semiconductor gas sensor
TL;DR: In this article, a diffusion equation was formulated by assuming that an inflammable gas (target gas) moves inside the film by Knudsen diffusion, while it reacts with the adsorbed oxygen following a first-order reaction kinetic.
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