Direct formation of highly porous gas-sensing films by in situ thermophoretic deposition of flame-made Pt/SnO2 nanoparticles

Mädler, Lutz; Roessler, Albert; Pratsinis, Sotiris E.; Sahm, T.; Gurlo, Aleksander; Bârsan, Nicolae; Weimar, Udo

doi:10.1016/j.snb.2005.05.014

Cited by 297 publications

(431 citation statements)

References 56 publications

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“…Recently, metal oxide semiconductors (MOS) [10][11][12][13][14][15][16][17] have been extensively investigated for this purpose due to their simplicity, small dimensions and attractive price. Several types of metal oxide semiconductors have been used as sensing material for different type of gases.…”

Section: Introductionmentioning

confidence: 99%

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

Liewhiran¹,

Tamaekong²,

Wisitsoraat³

et al. 2012

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Abstract. The noxious gas sensors were developed successfully using flame-spray-made SnO2 nanoparticles as the sensing materials. The functionalized nanoparticle properties were further analyzed by XRD, BET and TEM analyses. The SnO2 nanoparticles (SSABET: 141.6 m 2 /g) were investigated revealing non-agglomerated spherical, hexagonal, rectangle (3-10 nm), and rod-like (3-5 nm in width and 5-20 nm in length) morphologies. The sensing films were prepared by spin coating onto the Al2O3 substrates interdigitated with Au electrodes. The sensing films were significantly developed in order to detect with H2S (0.5-10 ppm) and SO2 (20-500 ppm) at the operating temperature ranging from 200-350°C. After sensing test, the cross-section of sensing film was analyzed by SEM analyses. It was found that SnO2 sensing film showed higher sensitivity to H2S gas with very fast response at lower concentrations (3s, to 10 ppm). The cross sensitivities of the sensor towards different concentrations of H2S, CO, H2, and C2H2 were measured at 300°C. The sensor evidently shows much less response to CO, H2, and C2H2 than to H2S indicating higher selectivity for H2S of the SnO2 sensor at the lower concentration (10 ppm). Therefore, the SnO2 sensor was the most suitable candidate for the efficient detection of H2S noxious gas.

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Section: Introductionmentioning

confidence: 99%

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

Liewhiran¹,

Tamaekong²,

Wisitsoraat³

et al. 2012

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“…6e-f, has a strikingly similar structure to the one presented by Mädler et al (2006a), where also thermophoresis is the dominating deposition mechanism, but clearly differs from the more tree-like structure presented by Castillo et al (2014), where diffusion clearly is the dominating deposition mechanism.…”

Section: Accumulation Of Particle Depositmentioning

confidence: 70%

“…deposition of the nanoparticles from the gas phase (Mädler et al, 2006a;Castillo et al, 2014;Liu et al, 2016). In our case, the nanoparticle deposition process from the flame onto the substrate is mainly a combination of thermophoresis and diffusion through the boundary layer above the surface:…”

Section: Accumulation Of Particle Depositmentioning

confidence: 96%

“…The FSP method generates well-defined nanoparticulate material which can be collected as a powder from the exhaust aerosol of the flame (Stepuk et al, 2013;Park and Park, 2015) or sprayed on a surface (Mishra et al, 2014). Apart from nanopowder production, recently the FSP and related techniques have also been used fairly efficiently in various types of coating applications (Mädler et al, 2006a;Tricoli et al, 2008;Pimenoff et al, 2009). With moderately high production rate (ca.…”

Section: Introductionmentioning

confidence: 99%

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Liquid Flame Spray—A Hydrogen-Oxygen Flame Based Method for Nanoparticle Synthesis and Functional Nanocoatings

Mäkelä¹,

Haapanen²,

Harra³

et al. 2017

KONA

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In this review article, a specific flame spray pyrolysis method, Liquid Flame Spray (LFS), is introduced to produce nanoparticles using a coflow type hydrogen-oxygen flame utilizing pneumatically sprayed liquid precursor. This method has been widely used in several applications due to its characteristic features, from producing nanopowders and nanostructured functional coatings to colouring of art glass and generating test aerosols. These special characteristics will be described via the example applications where the LFS has been applied in the past 20 years.

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“…Different methods to create dielectric-metal nanocomposites are available, such as sputtering, 16,17 electrochemical reactions, 18 electron beam deposition, 19 spray pyrolysis, 20 evaporation, 21 ion implantation, 22 CVD 23 and sol-gel. [24][25][26] These techniques usually suffer from poor control over physical and morphological properties and often size tuning and ensuring particle monodispersivity is difficult to achieve.…”

Section: Introductionmentioning

confidence: 99%

Colloidal approach to Au-loaded TiO2 thin films with optimized optical sensing properties

et al. 2011

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Direct formation of highly porous gas-sensing films by in situ thermophoretic deposition of flame-made Pt/SnO2 nanoparticles

Cited by 297 publications

References 56 publications

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

Liquid Flame Spray—A Hydrogen-Oxygen Flame Based Method for Nanoparticle Synthesis and Functional Nanocoatings

Colloidal approach to Au-loaded TiO2 thin films with optimized optical sensing properties

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