scholarly journals Synergistic Effect of Nanocrystalline SnO2 Sensitization by Bimetallic Au and Pd Modification via Ingle Step Flame Spray Pyrolysis Technique

Proceedings ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. 46
Author(s):  
Valeriy Krivetskiy ◽  
Konstantin Zamanskiy ◽  
Alina Krotova
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Spray Pyrolysis Technique ◽  
Single Step ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Level Control ◽  
Sensor Performance ◽  
Icp Ms ◽  
Composition Structure

Convenient and scalable single step flame spray pyrolysis (FSP) synthesis of bimetal AuPd sensitized nanocrystalline SnO2 for gas sensor application is reported. The materials chemical composition, structure and morphology has been studied by XRD, XPS, HAADFSTEM, BET, ICP-MS techniques as well as thermo-programmed reduction with hydrogen (TPR-H2). Superior gas sensor response of bimetal modified SnO2 towards wide concentration range of reducing (CO, CH4, C3H8, H2S, NH3) and oxidizing (NO2) gases compared to pure and monometallic modified SnO2 is reported. The observed enhanced gas sensor performance is concluded to arise from combination of facilitated oxygen molecule spillover on gold particles and electronic effect of Fermi level control by reoxidizing Pd-PdO clusters, homogeneously distributed over SnO2 particles surface.

scholarly journals Effect of AuPd Bimetal Sensitization on Gas Sensing Performance of Nanocrystalline SnO2 Obtained by Single Step Flame Spray Pyrolysis

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 728 ◽  
Author(s):  
Valeriy Krivetskiy ◽  
Konstantin Zamanskiy ◽  
Artemiy Beltyukov ◽  
Andrey Asachenko ◽  
Maxim Topchiy ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Gas Sensing ◽  
Chemical Reactivity ◽  
Medical Diagnostics ◽  
Single Step ◽  
Industrial Safety ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Level Control

Improvement of sensitivity, lower detection limits, stability and reproducibility of semiconductor metal oxide gas sensor characteristics are required for their application in the fields of ecological monitoring, industrial safety, public security, express medical diagnostics, etc. Facile and scalable single step flame spray pyrolysis (FSP) synthesis of bimetal AuPd sensitized nanocrystalline SnO2 is reported. The materials chemical composition, structure and morphology has been studied by XRD, XPS, HAADFSTEM, BET, ICP-MS techniques. Thermo-programmed reduction with hydrogen (TPR-H2) has been used for materials chemical reactivity characterization. Superior gas sensor response of bimetallic modified SnO2 towards wide concentration range of reducing (CO, CH4, C3H8, H2S, NH3) and oxidizing (NO2) gases compared to pure and monometallic modified SnO2 is reported for dry and humid gas detection conditions. The combination of facilitated oxygen molecule spillover on gold particles and electronic effect of Fermi level control by reoxidizing Pd-PdO clusters on SnO2 surface is proposed to give rise to the observed enhanced gas sensor performance.

Structural and optical properties of SrAl2O4: Eu2+/Dy3+ phosphors synthesized by flame spray pyrolysis technique

2019 ◽  
Vol 206 ◽  
pp. 59-69 ◽  
Author(s):  
Serdar Gültekin ◽  
Serdar Yıldırım ◽  
Ozan Yılmaz ◽  
İlker Çetin Keskin ◽  
Mehmet İsmail Katı ◽  
...  
Keyword(s):  
Optical Properties ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Structural And Optical Properties

scholarly journals NG.4 - H2 Gas Sensor Based on PdOx doped In2O3 Synthesized by Flame Spray Pyrolysis

2018 ◽  
Author(s):  
S. Phanichphant ◽  
K. Inyawilert ◽  
C. Liewhiran ◽  
A. Wisitsoraat
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Flame Spray Pyrolysis ◽  
Flame Spray

Enhanced VOCs Detection By the Co3O4/ZnO Nanocomposites, Obtained By Single Step Flame Spray Pyrolysis

2020 ◽  
Vol MA2020-01 (28) ◽  
pp. 2191-2191
Author(s):  
Alina Sagitova ◽  
Matvey Andreev ◽  
Valeriy Krivetskiy
Keyword(s):  
Spray Pyrolysis ◽  
Single Step ◽  
Flame Spray Pyrolysis ◽  
Flame Spray

H2 gas sensor based on PdOx-doped In2O3 nanoparticles synthesized by flame spray pyrolysis

2019 ◽  
Vol 475 ◽  
pp. 191-203 ◽  
Author(s):  
Kanittha Inyawilert ◽  
Anurat Wisitsoraat ◽  
Chaikarn Liewhiran ◽  
Adisorn Tuantranont ◽  
Sukon Phanichphant
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensor ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
In2o3 Nanoparticles

Characterization of Pt-Doped WO3 Nanoparticles Synthesized by Flame Spray Pyrolysis

2012 ◽  
Vol 326-328 ◽  
pp. 394-399
Author(s):  
Thanittha Samerjai ◽  
Nittaya Tamaekong ◽  
Sukon Phanichphant
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Spray Pyrolysis ◽  
Nitrogen Adsorption ◽  
Single Step ◽  
Spherical Particles ◽  
Bet Surface Area ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Transmission Electron

Undoped WO3and WO3nanoparticles doped with 0.251.0 wt.% Pt were successfully produced in a single step by flame spray pyrolysis (FSP) [. Tungsten (VI) ethoxide 5% w/v in ethanol 99.8% and platinum (II) acetylacetonate were used as W and Pt precursors respectively dissolved in ethanol. The undoped WO3and Pt-doped WO3nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive spectroscopy (EDS). The BET surface area (SSABET) of the nanoparticles was measured by nitrogen adsorption. From BET measurement,SSABETincreased anddBETdecreased with increasing Pt concentration from 0 to 1.0 wt.%. The morphology and accurate size of the primary particles were further investigated by high-resolution transmission electron microscopy (HRTEM). The crystallite size of undoped WO3spherical was found to be ranging from 520 nm and the crystallite sizes of 0.251.0 wt.% Pt-doped WO3spherical particles were found to be in the range of 520 nm.

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