Electron microscopy and EXAFS studies on oxide-supported gold–silver nanoparticles prepared by flame spray pyrolysis

2006 ◽  
Vol 252 (22) ◽  
pp. 7862-7873 ◽  
Author(s):  
Stefan Hannemann ◽  
Jan-Dierk Grunwaldt ◽  
Frank Krumeich ◽  
Peter Kappen ◽  
Alfons Baiker
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Spray Pyrolysis ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Gold Silver ◽  
Supported Gold

Luminescent properties of Y2O3:Eu3+ nanophosphor prepared from urea added precursor using flame spray pyrolysis

2009 ◽  
Vol 24 (8) ◽  
pp. 2584-2588 ◽  
Author(s):  
Jae Seok Lee ◽  
Se Jin Kim ◽  
Tae Kon Kim ◽  
Rajiv K. Singh ◽  
Madhav B. Ranade
Keyword(s):  
Electron Microscopy ◽  
Spray Pyrolysis ◽  
Red Light ◽  
Luminescent Properties ◽  
Flame Spray Pyrolysis ◽  
Cubic Phase ◽  
Flame Spray ◽  
X Ray Diffraction ◽  
Synthesis Conditions ◽  
Transmission Electron

Y2O3:Eu3+ nanophosphor was synthesized by flame spray pyrolysis (FSP) from urea added nitrate based liquid precursor. In this study, urea serves as fuel and subsequently provides additional heat in the flame zone during the synthesis of phosphor particles. The end product shows cubic phase Y2O3:Eu3+ nanophosphor successfully prepared by FSP without heat treatment. The influence of synthesis conditions such as different mol of urea and nitrate source materials in aqueous solution, and doping concentration on luminescent properties, were investigated. The characteristics of nanophosphor such as crystallinity and morphology under various experiments of conditions were carried out by x-ray diffraction (XRD) and field emission-scanning electron microscopy (FE-SEM). The particle size of product was found to be in the range of 20–30 nm from transmission electron microscopy (TEM). In photoluminescence (PL) properties, Y2O3:Eu3+ nanophosphor emitted red light with a peak wavelength of 609 nm when excited with 398 nm wavelength photons.

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.

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.

CuAl2O4–CuO–Al2O3 catalysts prepared by flame-spray pyrolysis for glycerol hydrogenolysis

2021 ◽  
pp. 111426
Author(s):  
Naphaphan Kunthakudee ◽  
Pongtanawat Khemthong ◽  
Chuleeporn Luadthong ◽  
Joongjai Panpranot ◽  
Okorn Mekasuwandumrong ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Glycerol Hydrogenolysis

Ultrafast Synthesis of High Entropy Oxide Nanoparticles by Flame Spray Pyrolysis

Langmuir ◽  
2021 ◽  
Author(s):  
Abhijit H. Phakatkar ◽  
Mahmoud Tamadoni Saray ◽  
Md Golam Rasul ◽  
Lioudmila V. Sorokina ◽  
Timothy G. Ritter ◽  
...  
Keyword(s):  
Spray Pyrolysis ◽  
Flame Spray Pyrolysis ◽  
Oxide Nanoparticles ◽  
Flame Spray ◽  
High Entropy

scholarly journals Double-Nozzle Flame Spray Pyrolysis as a Potent Technology to Engineer Noble Metal-TiO2 Nanophotocatalysts for Efficient H2 Production

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 817
Author(s):  
Maria Solakidou ◽  
Yiannis Georgiou ◽  
Yiannis Deligiannakis
Keyword(s):  
Spray Pyrolysis ◽  
Noble Metal ◽  
H2 Production ◽  
Flame Spray Pyrolysis ◽  
Flame Spray ◽  
Scale Production ◽  
Efficient Technology ◽  
Tio2 Photocatalysts ◽  
Surface Dispersion ◽  
Tio2 Matrix

Noble metal-TiO2 nanohybrids, NM0-TiO2, (NM0 = Pt0, Pd0, Au0, Ag0) have been engineered by One-Nozzle Flame Spray Pyrolysis (ON-FSP) and Double-Nozzle Flame Spray Pyrolysis (DN-FSP), by controlling the method of noble metal deposition to the TiO2 matrix. A comparative screening of the two FSP methods was realized, using the NM0-TiO2 photocatalysts for H2 production from H2O/methanol. The results show that the DN-FSP process allows engineering of more efficient NM0-TiO2 nanophotocatalysts. This is attributed to the better surface-dispersion and narrower size-distribution of the noble metal onto the TiO2 matrix. In addition, DN-FSP process promoted the formation of intraband states in NM0-TiO2, lowering the band-gap of the nanophotocatalysts. Thus, the present study demonstrates that DN-FSP process is a highly efficient technology for fine engineering of photocatalysts, which adds up to the inherent scalability of Flame Spray Pyrolysis towards industrial-scale production of nanophotocatalysts.

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