Construction of novel Pd–SnO2 composite nanoporous structure as a high-response sensor for methane gas

Yao, Lifang; Li, Yuxiu; Yan, Ran; Yang, Yue; Zhao, Rongjun; Su, Linfeng; Kong, Yulin; Ma, Dongying; Chen, Yunhua; Wang, Yude

doi:10.1016/j.jallcom.2020.154063

Cited by 61 publications

(19 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to test the repeatability of the eight sensor array, the engine speed was kept constant at 1000 rpm and the change in voltage was recorded. This result is shown in Figure 9 , which proves that the sensor values were reliable for a period of 2 h. An effective strategy to achieve eminent gas-sensing performances is that the sensor should possess high repeatability and long-term stability [ 24 ] and in our study, this repeatability is attributed to the unique nanoporous structures of SnO 2 and the chemical as well as electronic sensitization of palladium.…”

Section: Resultssupporting

confidence: 72%

“…When SnO 2 synthesized by hydrothermal method was doped with PdPt by in situ reduction of metallic salt and measured for its response to gaseous methane, the results demonstrated that the dopants can increase the response of SnO 2 sensor toward methane and also improve the stability during continuous cycles [ 23 ]. Moreover, the Pd-SnO 2 composite nanoporous structure showed prominent methane gas-sensing ability as compared with pure nanoparticles and this sensor also exhibited high repeatability and long-term stability [ 24 ]. Earlier it was shown that highly uniform SnO 2 nanowires act as sensitive, fast, stable, and reproducible gas sensors, that can be easily integrated into a multi-component array and the gas-sensing can be enhanced when functionalized with palladium catalyst [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

View full text Add to dashboard Cite

The exhaust gases from various sources cause air pollution, which is a leading contributor to the global disease burden. Hence, it has become vital to monitor and control the increasing pollutants coming out of the various sources into the environment. This paper has designed and developed a sensor material to determine the amount of carbon monoxide (CO), which is one of the major primary air pollutants produced by human activity. Nanoparticle-based sensors have several benefits in sensitivity and specificity over sensors made from traditional materials. In this study, tin oxide (SnO2), which has greater sensitivity to the target gas, is selected as the sensing material which selectively senses only CO. Tin oxide nanoparticles have been synthesized from stannous chloride dihydrate chemical compound by chemical precipitation method. Palladium, at the concentration of 0.1%, 0.2%, and 0.3% by weight, was added to tin oxide and the results were compared. Synthesized samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) techniques. XRD revealed the tetragonal structure of the SnO2 nanoparticles and FESEM analysis showed the size of the nanoparticles to be about 7–20 nm. Further, the real-time sensor testing was performed and the results proved that the tin oxide sensor, doped with 0.2% palladium, senses the CO gas more efficiently with greater sensitivity.

show abstract

Section: Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

View full text Add to dashboard Cite

show abstract

“…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%

“…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]). Altogether, the combination of response parameters is improved with respect to previous sensors, and the gas response expressed as Rg/Ra (gas resistance vs. air resistance) is higher.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CQDs@NiO: An Efficient Tool for CH4 Sensing

Carbone

2020

Applied Sciences

View full text Add to dashboard Cite

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.

show abstract

3D Mosaic Carbon Nanofiber Sensors for Room‐Temperature Detection of Methane and Other Dissolved Gases in Transformer Oil

Yang

Wang

et al. 2023

Adv Materials Inter

View full text Add to dashboard Cite

Hydrocarbons and carbon oxides are typical dissolved gases in transformer oil that reflect the latent pitfalls, on‐line monitoring of their concentrations can effectively evaluate the operating status of the power transformer. However, these low‐concentration targets (especially for CH4) show high chemical inertness at room temperature, challenging the sensitive performance of current commonly used chemiresistive gas sensors. Herein, a strategy by combining traditional inorganic semiconductors to carbon nanofiber (CNF) via electrospinning–annealing route is described. Three optimized 3D mosaic films, CNFs scaffold incorporated with WO3, SnO2 and MoS2 nanoparticles, are obtained. Due to the large specific surface area of the 3D network, and the synergic and heterojunction effects between nanoparticles and CNFs, all three sensors exhibit high response to CH4 at room temperature, and also record distinguishable signals toward H2, C2H4, CO and CO2, revealing the three sensors are cross‐sensitive to the five analytes. Accordingly, preliminary discrimination of five dissolved gases is realized by principle component analysis. This study provides an effective and extendable solution of preparing room‐temperature chemiresistive sensors for the detection of CH4 and other gases, and offers a strategy for the construction of sensor array to achieve a high discrimination capability.

show abstract

Construction of novel Pd–SnO2 composite nanoporous structure as a high-response sensor for methane gas

Cited by 61 publications

References 48 publications

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

CQDs@NiO: An Efficient Tool for CH4 Sensing

3D Mosaic Carbon Nanofiber Sensors for Room‐Temperature Detection of Methane and Other Dissolved Gases in Transformer Oil

Contact Info

Product

Resources

About