Mo influence on SnO2 thin films properties

Zampiceni, E.; Bontempi, Elza; Sberveglieri, G.; Depero, Laura E.

doi:10.1016/s0040-6090(02)00580-1

Cited by 21 publications

(6 citation statements)

References 8 publications

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“…MoO 3 is n-type semiconductor that can change the acidity performances of SnO 2 surfaces against reactivity with different gases [11,12]. The introduction of 4 MoO 3 reduces the electrical conductivity of SnO 2 by two orders of magnitude in air, which may be due to the transfer of electrons trapped at oxygen vacancies to Mo 6+ [13].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and gas-sensing properties of nano- and meso-porous MoO3-doped SnO2

Firooz

Hyodo

Mahjoub

et al. 2010

Sensors and Actuators B: Chemical

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Nano-and meso-porous SnO 2 powders doped with and without 1~10 wt% MoO 3 have been synthesized by an ultrasonic spray-pyrolysis method employing a precursor aqueous solution containing tin (IV) chloride pantahydrate (SnCl 4 ·5H 2 O), ammonium heptamolybdate and polymethylmethacrylate (PMMA) microspheres as a template, and the effects of MoO 3 -doping and the addition of PMMA microspheres on the structural, morphological and gas-sensing properties of SnO 2 were investigated in this study. It is confirmed that control of the amounts of PMMA microspheres in the precursor solution was effective in realizing well-developed nano-and meso-porous structures of SnO 2 by X-ray diffraction analysis, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and the measurement of specific surface area and pore size distribution using a N 2 adsorption isotherm. Gas-sensing properties of their thick films (about 50 µm thick), which were fabricated by screen-printing to various gases (NO 2 , C 2 H 5 OH and H 2 ) were tested in ambient air. The doped thick films showed a high response and selectivity to 5 ppm NO 2 gas in the case of 10 wt% MoO 3 -doping in both nano-and meso-porous structures of SnO 2 . We observed that the presence of Mo species in SnO 2 lattice can improve the sensor response and selectivity towards NO 2 gas. The effect of the MoO 3 -doping on the sensing characteristics of these films towards NO 2 was discussed.

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Section: Introductionmentioning

confidence: 99%

Synthesis and gas-sensing properties of nano- and meso-porous MoO3-doped SnO2

Firooz

Hyodo

Mahjoub

et al. 2010

Sensors and Actuators B: Chemical

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“…The reported operating temperatures and detection limits of NO 2 are quite high [34][35][36][37][38][39][40][41][42][43][44][45].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured tin oxide films: Physical synthesis, characterization, and gas sensing properties

Ingole

Navale

et al. 2017

Journal of Colloid and Interface Science

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Nanostructured tin oxide (SnO) films are synthesized using physical method i.e. thermal evaporation and are further characterized with X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and atomic force microscopy measurement techniques for confirming its structure and morphology. The chemiresistive properties of SnO films are studied towards different oxidizing and reducing gases where these films have demonstrated considerable selectivity towards oxidizing nitrogen dioxide (NO) gas with a maximum response of 403% to 100ppm @200°C, and fast response and recovery times of 4s and 210s, respectively, than other test gases. In addition, SnO films are enabling to detect as low as 1ppm NO gas concentration @200°C with 23% response enhancement. Chemiresistive performances of SnO films are carried out in the range of 1-100ppm and reported. Finally, plausible adsorption and desorption reaction mechanism of NO gas molecules with SnO film surface has been thoroughly discussed by means of an impedance spectroscopy analysis.

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“…The optical transparency and electrical conductivity in TCOs is achieved by increasing the number of free charge carriers through intrinsic defects, such as oxygen vacancies, or through extrinsic dopants, typically higher valency metal cations [13][14]. In literature various dopants are used to improve the electrical properties of tin oxide (SnO 2 ) [15][16]. Among these dopants, Sb [14] and F [8] with n-type conductivity of SnO 2 thin films have shown to be the most achieved commercial use due to its low cost and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Influence of film thickness on structural, optical, and electrical properties of spray deposited antimony doped SnO2 thin films

Yadav¹

2015

Thin Solid Films

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Mo influence on SnO2 thin films properties

Cited by 21 publications

References 8 publications

Synthesis and gas-sensing properties of nano- and meso-porous MoO3-doped SnO2

Synthesis and gas-sensing properties of nano- and meso-porous MoO3-doped SnO2

Nanostructured tin oxide films: Physical synthesis, characterization, and gas sensing properties

Influence of film thickness on structural, optical, and electrical properties of spray deposited antimony doped SnO2 thin films

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