High butane sensitivity and selectivity exhibited by combustion synthesized SnO2 nanoparticles

Banerjee, Suparna; Nag, Pratanu; Majumdar, Saikat; Devi, P. Sujatha

doi:10.1016/j.materresbull.2015.01.025

Cited by 13 publications

(5 citation statements)

References 52 publications

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“…The attached OH À is responsible for generation of oxygen ion (O À ) which remains chemisorbed on the surface of the material and gradually transforms into some other forms of anionic oxygen (like, O ] ) by extracting free electrons from the conduction band, resulting in an electron depleted surface layer and a consequent rise in resistance. The relevant chemical species exist in equilibrium [39][40][41] as follows:…”

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confidence: 99%

Selective detection of carbon monoxide (CO) gas by reduced graphene oxide (rGO) at room temperature

et al. 2016

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confidence: 99%

Selective detection of carbon monoxide (CO) gas by reduced graphene oxide (rGO) at room temperature

et al. 2016

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“… Materials Concentration (ppm) Operating temperature (°C) Response Ref. 7.5 mol% Pd-TiO 2 100 340 5.06 This work 200 7.39 500 12.03 1000 17.93 3000 33.93 5000 43.76 W-TiO 2 5000 420 22.18 21 Pt-SnO 2 5000 400 4.6 32 SnO 2 1000 350 11.76 33 LaFeO 3 1660 250 14.28 34 MgFe 2 O 4 2000 425 3.45 35 CrNbO 4 1000 325 6.67 36 CoFe 2 O 4 200 250 3.65 37 Pt-ZnO 9000 250 2.44 38 Zn 2 SnO 4 -ZnO 3000 2.70 TiO 2 5200 400 1.63 39 Cu 2 ZnSnS 4 10400 350 2.63 ...…”

Section: Resultsmentioning

confidence: 99%

TiO2 nanoparticles functionalized by Pd nanoparticles for gas-sensing application with enhanced butane response performances

Chen

Deng

et al. 2017

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Pd functionalized TiO2 nanoparticles were synthesized by a facile hydrothermal method. The structure, morphology, surface chemical states and surface area were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and N2 adsorption-desorption isotherms, respectively. The as-synthesized pure and Pd functionalized TiO2 nanoparticles were used to fabricate indirect-heating gas sensor, and the gas-sensing characteristics towards butane were investigated. At the optimum temperature, the sensors possess good response, selectivity, response/recovery, repeatability as well as long-term stability. Especially for the high response, the response of 7.5 mol% Pd functionalized TiO2 nanoparticles based sensor reaches 33.93 towards 3000 ppm butane, which is about 9 times higher than that of pure TiO2 nanoparticles. The response and recovery time are 13 and 8 s, respectively. Those values demonstrate the potential of using as-synthesized Pd functionalized TiO2 nanoparticles as butane gas detection, particularly in the dynamic monitoring. Apart from these, a possible mechanism related to the enhanced sensing performance is also investigated.

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“…If hydrocarbon molecules contain more carbon atoms, they are expected to dissociate more easily. As the C–H bond dissociation energy for butane (425 KJ/mol) is lower than that of methane (436 KJ/mol) [37], methane is more stable and thus more difficult to dissociate via reactions with adsorbed oxygen. As oxidation reactions with H 2 or CO are more difficult to conduct under same test conditions, butane can more quickly react with adsorbed oxygen and diffuse into sensing layer.…”

Section: Resultsmentioning

confidence: 99%

Pd-Functionalized SnO2 Nanofibers Prepared by Shaddock Peels as Bio-Templates for High Gas Sensing Performance toward Butane

et al. 2018

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Pd-functionalized one-dimensional (1D) SnO2 nanostructures were synthesized via a facile hydrothermal method and shaddock peels were used as bio-templates to induce a 1D-fiber-like morphology into the gas sensing materials. The gas-sensing performances of sensors based on different ratios of Pd-functionalized SnO2 composites were measured. All results indicate that the sensor based on 5 mol % Pd-functionalized SnO2 composites exhibited significantly enhanced gas-sensing performances toward butane. With regard to pure SnO2, enhanced levels of gas response and selectivity were observed. With 5 mol % Pd-functionalized SnO2 composites, detection limits as low as 10 ppm with responses of 1.38 ± 0.26 were attained. Additionally, the sensor exhibited rapid response/recovery times (3.20/6.28 s) at 3000 ppm butane, good repeatability and long-term stability, demonstrating their potential in practical applications. The excellent gas-sensing performances are attributed to the unique one-dimensional morphology and the large internal surface area of sensing materials afforded using bio-templates, which provide more active sites for the reaction between butane molecules and adsorbed oxygen ions. The catalysis and “spillover effect” of Pd nanoparticles also play an important role in the sensing of butane gas as further discussed in the paper.

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High butane sensitivity and selectivity exhibited by combustion synthesized SnO2 nanoparticles

Cited by 13 publications

References 52 publications

Selective detection of carbon monoxide (CO) gas by reduced graphene oxide (rGO) at room temperature

Selective detection of carbon monoxide (CO) gas by reduced graphene oxide (rGO) at room temperature

TiO2 nanoparticles functionalized by Pd nanoparticles for gas-sensing application with enhanced butane response performances

Pd-Functionalized SnO2 Nanofibers Prepared by Shaddock Peels as Bio-Templates for High Gas Sensing Performance toward Butane

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