Facile synthesis of Ca 2+ /Au co-doped SnO 2 nanofibers and their application in acetone sensor

Jiang, Ziqiao; Yin, Mingying

doi:10.1016/j.matlet.2017.02.031

Cited by 33 publications

(12 citation statements)

References 12 publications

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“…The excel of Au/SnO 2 over AuPd/SnO 2 in acetone detection can be explained due to higher Au content and, hence, elevated concentration of active oxidation sites on the surface. The profound response improvement towards acetone in case of Au-modified SnO 2 and other metal oxides has been reported previously [14,15,34,56,57]. Although the direct comparison of laboratory-made gas sensor sample performance is complicated due to different chip design, humidity conditions, material chemical composition and other measurement parameters, we can conclude that presented here acetone sensitivity of Au/SnO 2 material towards acetone matches one of the best reported performances of material with close Au content and far more complicated synthesis protocol [58].…”

Section: Resultssupporting

confidence: 73%

Effect of AuPd Bimetal Sensitization on Gas Sensing Performance of Nanocrystalline SnO2 Obtained by Single Step Flame Spray Pyrolysis

et al. 2019

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Improvement of sensitivity, lower detection limits, stability and reproducibility of semiconductor metal oxide gas sensor characteristics are required for their application in the fields of ecological monitoring, industrial safety, public security, express medical diagnostics, etc. Facile and scalable single step flame spray pyrolysis (FSP) synthesis of bimetal AuPd sensitized nanocrystalline SnO2 is reported. The materials chemical composition, structure and morphology has been studied by XRD, XPS, HAADFSTEM, BET, ICP-MS techniques. Thermo-programmed reduction with hydrogen (TPR-H2) has been used for materials chemical reactivity characterization. Superior gas sensor response of bimetallic modified SnO2 towards wide concentration range of reducing (CO, CH4, C3H8, H2S, NH3) and oxidizing (NO2) gases compared to pure and monometallic modified SnO2 is reported for dry and humid gas detection conditions. The combination of facilitated oxygen molecule spillover on gold particles and electronic effect of Fermi level control by reoxidizing Pd-PdO clusters on SnO2 surface is proposed to give rise to the observed enhanced gas sensor performance.

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Section: Resultssupporting

confidence: 73%

Effect of AuPd Bimetal Sensitization on Gas Sensing Performance of Nanocrystalline SnO2 Obtained by Single Step Flame Spray Pyrolysis

et al. 2019

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“…In general, these material parameters are modified by controlling the precursor concentration and/or calcination temperature [ 130 ]. The most effective approach to improve the gas sensing response of pure MOx 1D nanostructures is by functionalizing with different catalytic metals, MOx or noble metals [ 11 , 146 ]. Doping changes the reaction kinetics and electronic characteristics as well as the structural properties, including size and topology of the MOx 1D nanostructures, which leads to a change in their chemical sensing behaviour.…”

Section: Reviewmentioning

confidence: 99%

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Muhammad¹,

Motta²,

Shafiei³

2018

Beilstein J. Nanotechnol.

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Electrospun one-dimensional (1D) nanostructures are rapidly emerging as key enabling components in gas sensing due to their unique electrical, optical, magnetic, thermal, mechanical and chemical properties. 1D nanostructures have found applications in numerous areas, including healthcare, energy storage, biotechnology, environmental monitoring, and defence/security. Their enhanced specific surface area, superior mechanical properties, nanoporosity and improved surface characteristics (in particular, uniformity and stability) have made them important active materials for gas sensing applications. Such highly sensitive and selective elements can be embedded in sensor nodes for internet-of-things applications or in mobile systems for continuous monitoring of air pollutants and greenhouse gases as well as for monitoring the well-being and health in everyday life. Herein, we review recent developments of gas sensors based on electrospun 1D nanostructures in different sensing platforms, including optical, conductometric and acoustic resonators. After explaining the principle of electrospinning, we classify sensors based on the type of materials used as an active sensing layer, including polymers, metal oxide semiconductors, graphene, and their composites or their functionalized forms. The material properties of these electrospun fibers and their sensing performance toward different analytes are explained in detail and correlated to the benefits and limitations for every approach.

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“…In 2017, Xu et al (9) studied a highly sensitive VOC-acetone sensor based on Ag-modified SnO 2 hollow nanofibers, which has high responsiveness and selectivity to acetone at 160 °C. In the same year, Jiang et al (10) studied the application of Ca 2+ /Au-doped SnO 2 nanofibers in acetone sensors with high responsivity at 180 °C. In 2018, Preethi et al (11) found that 1% Ga-doped thin films were an effective acetone gas sensor with 68% sensitivity at 350 °C.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Graphene Quantum Dots and Their Sensing Properties in Quartz Crystal Microbalance Acetone Sensor

Wang¹,

Lin²,

Lin³

et al. 2021

Sensors and Materials

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Acetone is a slightly toxic volatile organic gas, which exists in the breath and is closely related to diseases such as diabetes. In this paper, a quartz crystal microbalance (QCM) was used to fabricate an acetone sensor, and graphene quantum dots (GQDs) were used as a gas-sensing material to modify the QCM. GQDs were prepared by citrate pyrolysis and characterized by high-resolution transmission electron microscopy (TEM). The gas sensitivity of the sensor to low concentrations of acetone was investigated. It exhibited good linearity at acetone concentrations of less than 240 ppm with a sensitivity of 16.78 Hz/ppm and a minimum detection limit of 2.5 ppm, and the fitted line had a coefficient of determination R 2 of 0.95658. In a mixture of acetone, butanol, and isopropanol, the sensor exhibited good selectivity for acetone. For different acetone concentrations, the response speed of the same sensor was basically the same, and the response and recovery times were 32 and 48 s, respectively. We showed that the prepared gas sensor has good sensitivity, repeatability, and selectivity for low concentrations of acetone.

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Facile synthesis of Ca 2+ /Au co-doped SnO 2 nanofibers and their application in acetone sensor

Cited by 33 publications

References 12 publications

Effect of AuPd Bimetal Sensitization on Gas Sensing Performance of Nanocrystalline SnO2 Obtained by Single Step Flame Spray Pyrolysis

Effect of AuPd Bimetal Sensitization on Gas Sensing Performance of Nanocrystalline SnO2 Obtained by Single Step Flame Spray Pyrolysis

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Preparation of Graphene Quantum Dots and Their Sensing Properties in Quartz Crystal Microbalance Acetone Sensor

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