Flame spray pyrolysis based nano-structured functional metal oxide layers for gas sensing applications

2007 ◽  
Author(s):  
Nicolae Barsan ◽  
Lutz Mädler ◽  
Udo Weimar
Keyword(s):  
Metal Oxide ◽  
Spray Pyrolysis ◽  
Gas Sensing ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Oxide Layers ◽  
Sensing Applications

Hydrogen and Ethanol Sensing Properties of Pd-Loaded ZnO Nanoparticles Synthesized by Flame Spray Pyrolysis

2015 ◽  
Vol 1131 ◽  
pp. 146-152 ◽  
Author(s):  
Chawarat Siriwong ◽  
Jintaporn Yimchoy ◽  
Sangtian Nabsanit ◽  
Anurat Wisitsoraat ◽  
Sukon Phanichphant
Keyword(s):  
Electron Microscopy ◽  
Spray Pyrolysis ◽  
Zno Nanoparticles ◽  
Gas Sensing ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Coating Film ◽  
Sensing Applications ◽  
Transmission Electron ◽  
Ethanol Sensing

Pure ZnO and Palladium (Pd)-loaded ZnO nanoparticles containing 0.25, 0.50, 0.75 and 1.0 mol% of Pd were successfully synthesized by flame spray pyrolysis (FSP) and characterized for hydrogen and ethanol sensing applications. The crystalline phase, morphology and size of these nanoparticles were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM) in order to correlate physical properties with gas sensing performance. The sensing films were fabricated by coating nanoparticles with organic paste composed of terpineol and ethyl cellulose as a vehicle binder on Al2O3 substrate interdigitated with gold electrodes. The film thicknesses were varied by controlling the numbers of coating. Film morphologies of gas sensors were characterized by atomic force microscopy (AFM) and scanning electron microscopy (SEM). Moreover, response time and sensitivity of these sensors towards hydrogen and ethanol were evaluated under operating temperatures ranging from 200 ̶ 350°C in dry air. Finally, The optimum amount of loading Pd and film thickness were investigated.

scholarly journals Characterization and Optical Gas Sensing Properties of BaSnO3 Synthesized By Novel Technique: Flame Spray Pyrolysis

2021 ◽  
Author(s):  
Merve ZEYREK ONGUN ◽  
Sibel OGUZLAR ◽  
Alper S. Akalin ◽  
Serdar Yildirim
Keyword(s):  
Spray Pyrolysis ◽  
Photoelectron Spectroscopy ◽  
Near Infrared ◽  
Gas Sensing ◽  
Flame Spray Pyrolysis ◽  
Electromagnetic Spectrum ◽  
Flame Spray ◽  
X Ray ◽  
Sensing Properties ◽  
Gas Sensing Properties

Abstract Barium stannate (BaSnO3) particles were synthesized using a one-step flame spray pyrolysis (FSP) method. The fabricated ceramic powders were investigated in terms of the structural, morphological, and optical properties by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), X-Ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), zeta particle size analyzer, UV-visible spectroscopy (UV-vis) and photoluminescence spectroscopy (PL). The XRD results showed the structure of BaSnO3 crystals have been obtained when the powders were exposed at high temperature, specifically at 1200 °C. The synthesized particles in the submicron size in a range of 70-980 nm were produced. The optical band gap value of the synthesized crystals was calculated by means of reflectance spectra with the Kubelka-Munk method and found as 3.14 eV. When the powders excited at 375 nm, they exhibited emission bands in the visible and near-infrared region (NIR) of the electromagnetic spectrum. As far as we know, this is the first time BaSnO3 crystals have been synthesized using the FSP technique. In this study, the intensity- and decay time- based gas sensing properties of BaSnO3 embedded in ethyl cellulose thin films when exposed to the vapors of ethanol, acetone, and ammonia were also measured.

Ultrafine Bi2WO6 nanoparticles prepared by flame spray pyrolysis for selective acetone gas-sensing

2019 ◽  
Vol 90 ◽  
pp. 263-275 ◽  
Author(s):  
Matawee Punginsang ◽  
Anurat Wisitsoraat ◽  
Adisorn Tuantranont ◽  
Sukon Phanichphant ◽  
Chaikarn Liewhiran
Keyword(s):  
Spray Pyrolysis ◽  
Gas Sensing ◽  
Flame Spray Pyrolysis ◽  
Flame Spray

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.

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