Facile synthesis of a SnO2@rGO nanohybrid and optimization of its methane-sensing parameters

Navazani, Shiva; Shokuhfar, Ali; Hassanisadi, Mostafa; Askarieh, Mojtaba; Carlo, Aldo Di; Agresti, Antonio

doi:10.1016/j.talanta.2018.01.015

Cited by 65 publications

(26 citation statements)

References 69 publications

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“…The slow response/recovery was caused by the low working temperature and the strong stability of methane molecules. This phenomenon has been observed by other reports on the detection of methane [4,44,45]. Methods of achieving rapid response/recovery at low working temperatures still need to be investigated.…”

Section: Resultssupporting

confidence: 62%

Enhanced Methane Sensing Properties of WO3 Nanosheets with Dominant Exposed (200) Facet via Loading of SnO2 Nanoparticles

Xue

Wang

et al. 2019

Nanomaterials

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Methane detection is extremely difficult, especially at low temperatures, due to its high chemical stability. Here, WO3 nanosheets loaded with SnO2 nanoparticles with a particle size of about 2 nm were prepared by simple impregnation and subsequent calcination using SnO2 and WO3·H2O as precursors. The response of SnO2-loaded WO3 nanosheet composites to methane is about 1.4 times higher than that of pure WO3 at the low optimum operating temperature (90 °C). Satisfying repeatability and long-term stability are ensured. The dominant exposed (200) crystal plane of WO3 nanosheets has a good balance between easy oxygen chemisorption and high reactivity at the dangling bonds of W atoms, beneficial for gas-sensing properties. Moreover, the formation of a n–n type heterojunction at the SnO2-WO3 interface and additionally the increase of specific surface area and defect density via SnO2 loading enhance the response further. Therefore, the SnO2-WO3 composite is promising for the development of sensor devices to methane.

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Section: Resultssupporting

confidence: 62%

Enhanced Methane Sensing Properties of WO3 Nanosheets with Dominant Exposed (200) Facet via Loading of SnO2 Nanoparticles

Xue

Wang

et al. 2019

Nanomaterials

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“…The response to 100 μL/L CH 4 was 2.2% at 260°C. Graphene hybrid with ZnO (Zhang et al, 2015b ) and SnO 2 (Navazani et al, 2018 ) also exhibited unique sensing properties to CH 4 around 190 and 150°C. Nasresfahani et al ( 2017 ) synthesized Pd-doped SnO 2 /rGO via hydrothermal route, and the sensing performance to 800–16,000 μL/L CH 4 were carried out at room temperature.…”

Section: Application Of Gas Sensormentioning

confidence: 99%

Application of Graphene Hybrid Materials in Fault Characteristic Gas Detection of Oil-Immersed Equipment

2018

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Graphene and its hybrid materials, due to their unique structures and properties, have attracted enormous attention for both fundamental and applied research in the gas sensing field. This review highlights the recent advances in the application of graphene-based gas sensors in fault characteristic gas detection of oil-immersed equipment, which can effectively achieve condition monitoring of the oil-immersed power equipment. In this review, the synthetic methods of graphene hybrid materials with noble metals, metal oxides and their combination are presented. Then, the basic sensing mechanisms of graphene hybrid materials and gas sensing properties of graphene hybrid materials sensors to hydrogen (H2), carbon monoxide (CO), carbon dioxide (CO2), methane (CH4), acetylene (C2H2), ethylene (C2H4), and ethane (C2H6), which are the fault characteristic gas in oil-immersed power equipment, are summarized. Finally, the future challenges and prospects of graphene hybrid materials gas sensors in this field are discussed.

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“…As far as methane detection is concerned, sensors are often based on n-type semiconductors, and SnO 2 is typically used. Recently, Pd-SnO 2 [42], Pt-SnO 2 [43], and r-GO/SnO 2 [44] were investigated as materials for methane sensors. On the other hand, SnO 2 was also used by decorating NiO for the same sensing purpose [45].…”

Section: Introductionmentioning

confidence: 99%

“…Upon optimization of the operational parameters, it turns out that the synthesized composite material has very good performance in CH 4 sensing, in humid environments, with a high selectivity, where the best performance was achieved by the 1%CQDs@NiO, i.e., the sensor built using NiO with 1% weight load of CQDs. As compared to SnO 2 -based sensors [28,[41][42][43][44][45], the optimum temperature of the 1%CQDs@NiO sensor is equal or lower (150 • C), with detection of a lower concentration of CH 4 . The response/recovery time is on average lower (with the exception of the Pd-SnO 2 -based sensor [42]).…”

Section: Introductionmentioning

confidence: 99%

CQDs@NiO: An Efficient Tool for CH4 Sensing

Carbone

2020

Applied Sciences

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A composite material based on carbon quantum dots (CQDs) and NiO was prepared and tested for methane sensing. The synthesis procedure is simple and foresees the preparation of the CQDs by citric acid pyrolysis and NiO by hydrothermal synthesis. A phase sonication and stirring procedure yielded the composite CQDs@NiO at different loads. The composites were characterized by X-ray diffraction, ultraviolet–visible light (UV–Vis) spectroscopy, SEM microscopy, energy-dispersive spectroscopy (EDS) mapping, and surface area, porosity, and impedance measurements. A gas sensor was built in-house and used to probe the response of the synthesized samples to CH4 detection, at constant environmental humidity. The CQDs@NiO at 1% weight load displayed excellent performances in terms of gas response both vs. temperature and vs. concentration, whereas higher loads resulted in CQD aggregation and diminished output. Response/recovery times of the 1%CQDs@NiO sample were good, as well as the selectivity and the stability over time and for variable environmental humidity. The estimated limit of detection was 0.1 ppm.

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Facile synthesis of a SnO2@rGO nanohybrid and optimization of its methane-sensing parameters

Cited by 65 publications

References 69 publications

Enhanced Methane Sensing Properties of WO3 Nanosheets with Dominant Exposed (200) Facet via Loading of SnO2 Nanoparticles

Enhanced Methane Sensing Properties of WO3 Nanosheets with Dominant Exposed (200) Facet via Loading of SnO2 Nanoparticles

Application of Graphene Hybrid Materials in Fault Characteristic Gas Detection of Oil-Immersed Equipment

CQDs@NiO: An Efficient Tool for CH4 Sensing

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