Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

Cho, Yoon Ho; Liang, Xishuang; Kang, Yun Chan; Lee, Jong Heun

doi:10.1016/j.snb.2014.10.001

Cited by 92 publications

(34 citation statements)

References 41 publications

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“…6b) show relatively fast response time compared to the sensor based on nanoparticles (Fig. 29,30 Keeping in mind the application value of the as-fabricated sensor, the reproducibility (Fig. However, the recovery times of three structure-based sensors are relatively long in comparison to their response time values.…”

Section: Sensing Propertiesmentioning

confidence: 95%

The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

et al. 2016

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Core-shell SnO 2 @ZnO composite nanospheres were successfully prepared by using carbon spheres as sacrificial templates via a facile three-step procedure including a hydrothermal method. In contrast, pristine SnO 2 nanospheres and ZnO nanoparticles were obtained through a similar method with different steps, respectively. The composition and structures of the as-synthesized samples were confirmed by a series of characterization procedures. The obtained composite materials exhibited the special core-inhollow-shell structure at the nanometer level. And as potential sensing materials, the obtained coreshell SnO 2 @ZnO composite nanomaterials demonstrated better gas sensing properties to ethanol including higher response, better selectivity, faster response and favorable repeatability, which may be related to the special core-in-hollow-shell structure with a porous surface and the hetero-contact between two different metal oxide semiconductors.

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Section: Sensing Propertiesmentioning

confidence: 95%

The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

et al. 2016

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“…As dopants, most commonly used metals of platinum group-Pt, Pd, Ru, Rh [11,15,37,39], or oxide catalysts-Fe 2 O 3 , La 2 O 3 , Cr 2 O 3 , V 2 O 5 , NiO, CuO [16,17,30,33,40,41]. Important step-choice modifier for the gas and the change the reactivity of the material by changing the modifier concentration.…”

Section: Choose Of Additives For Increasing Selectivity Of Sno2-basedmentioning

confidence: 99%

Effect of Modification/Doping on Gas Sensing Properties of SnO2

Nagirnyak¹,

Dontsova²

2017

Nano Res Appl

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Modification and doping are both terms which used to display improvement of sensory characteristics of materials, particularly their selectivity. But these processes are different in the way how they influence on material's properties. This review concentrates on differences between modification and doping and their impact on parameters of sensitive materials for semiconductor gas sensors, in particular on characteristics of SnO 2 as one of the most promising sensor material.

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“…According to our estimations, 1.0 ML corresponded to the averaged thickness of the rhodium coverage ~ 0.3 nm . However, numerous studies have shown that such coatings are not optimal for many applications, including catalysis and gas sensorics . The optimum characteristics of the sensors and catalysts were obtained at much lower rhodium concentrations on the surface of the metal oxides.…”

Section: Introductionmentioning

confidence: 99%

“…14,16 However, numerous studies have shown that such coatings are not optimal for many applications, including catalysis 17 and gas sensorics. 10,[18][19][20] The optimum characteristics of the sensors and catalysts were obtained at much lower rhodium concentrations on the surface of the metal oxides. For example, Shimizu et al 19 believe that the optimum gas sensitivity effect was achieved at the rhodium concentration of 0.1 wt%.…”

mentioning

confidence: 99%

XPS study of the SnO₂ films modified with Rh

Brînzari

Hanyš

Nehasil

2018

Surface & Interface Analysis

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In this paper, we have analyzed the effect of the rhodium surface modification on the surface state of SnO2 films. SnO2 films, subjected for the surface modification, were deposited by spray pyrolysis, while Rh was deposited by using a microelectron beam evaporation. The thickness of the Rh coating varied in the range 0 to 0.1 monolayer. An explanation of the observed effects was proposed. Basing on the results of X‐ray photoelectron spectroscopy, it was assumed that at a small thickness of the rhodium covering, Rh was in a the well‐dispersed state, close to atomically dispersed state. The growth in the size of the nanoparticles began mainly when the thickness of the Rh covering exceeeded 0.01 monolayer. The size of clusters did not exceed 0.5 to 1.0 nm.

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Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

Cited by 92 publications

References 41 publications

The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

Effect of Modification/Doping on Gas Sensing Properties of SnO2

XPS study of the SnO₂ films modified with Rh

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Ultrasensitive detection of trimethylamine using Rh-doped SnO2 hollow spheres prepared by ultrasonic spray pyrolysis

Cited by 92 publications

References 41 publications

The synthesis and fast ethanol sensing properties of core–shell SnO2@ZnO composite nanospheres using carbon spheres as templates

The synthesis and fast ethanol sensing properties of core–shell SnO2@ZnO composite nanospheres using carbon spheres as templates

Effect of Modification/Doping on Gas Sensing Properties of SnO2

XPS study of the SnO2 films modified with Rh

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Product

Resources

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The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

The synthesis and fast ethanol sensing properties of core–shell SnO₂@ZnO composite nanospheres using carbon spheres as templates

XPS study of the SnO₂ films modified with Rh