Gas-disperse synthesis of metal oxide particles

Zolotko, A. N.; Poletaev, N. I.; Vovchuk, Ya. I.

doi:10.1134/s0010508215020094

Cited by 19 publications

(17 citation statements)

References 34 publications

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“…Indium thin oxide coated glass plate was used as solid support. ZnO nanorods were deposited as powder by gaseous disperse method as explained in previous methods [12]. PANI was synthesized by oxidative-chemical deposition method [13].…”

Section: Zno Deposition and Formation Of Zno-pani Compositementioning

confidence: 99%

ZnO/polyaniline composite based photoluminescence sensor for the determination of acetic acid vapor

Turemis

Zappi

Giardi

et al. 2020

Talanta

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In this study, we report a novel ZnO/polyaniline (PANI) nanocomposite optical gas sensor for the determination of acetic acid at room temperatures. ZnO nanorods, synthesized in powder form were coated by PANI (ZnO/ PANI) by chemical polymerization method. The obtained nanocomposites were deposited on glass substrate and dried overnight at room temperature. Structure and optical properties of ZnO/PANI nanocomposite have been studied by using X-ray diffraction, transmission electron microscopy, scanning electron microscopy, diffuse reflectance and photoluminescence spectroscopy. Tests towards acetic acids were performed in the range of concentrations 1-13 ppm. The adsorption of acetic acid on the sensor's surface resulted in the decrease of ZnO/ PANI photoluminescence. The response and recovery time of the sensor were in the range of 30-50 s and 5 min, respectively. The developed sensors showed sensitivity towards acetic acid in a range of 1-10 ppm with the limit of detection of 1.2 ppm. Specially designed miniaturized sensing system based on integrated sensing layer, light emission diode as excitation source and optical fiber spectrometer was developed for the measurement of the sensor signal. The developed sensing system was applied for the investigation of some real sample assessment including the evaluation of storage conditions of ancient cellulose acetate films, which during the degradation are releasing acetic acid. The obtained results suggest that the developed novel optical ZnO/PANI nanocompsite based sensor shows great potential for acetic acid determination in various samples.

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Section: Zno Deposition and Formation Of Zno-pani Compositementioning

confidence: 99%

ZnO/polyaniline composite based photoluminescence sensor for the determination of acetic acid vapor

Turemis

Zappi

Giardi

et al. 2020

Talanta

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“…For instance, nanosized silica particles in fluid flow (nanofluid flow) alter physics and mechanics of heat exchange processes compared with pure fluid flow [2]. One of the conventional techniques of gas-disperse synthesis of metal oxide particles is based on oxidation of metal vapors [3]. In [1] a comprehensive review of vapor-phase synthesis of ceramic oxide particles (in particular, SiO 2 nanoparticles), analysis of gas-phase and nucleation kinetics as well as modeling of physico-chemical phenomena accompanying particle formation and growth is presented.…”

Section: Introductionmentioning

confidence: 99%

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

Kartaev

Emel’kin

Aul’chenko

2017

AIP Conference Proceedings

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Abstract. The experimental and numerical investigations of synthesis of silica (SiO2) nanoparticles from premixed gaseous silicon tetrachloride (SiCl4) and oxygen of dry air in the high-temperature nitrogen flow of plasma-chemical reactor have been carried out. The regime of counter flow jet quenching of high-temperature heterogeneous flow has been utilized. The latter provided a rapid cooling of silica particles under nonequilibrium conditions with substantial temperature gradients. Synthesized silica particles were amorphous, with surface-average size being about 28 nm. The results of numerical calculations are found to agree qualitatively with experimental data.

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“…Specifi cities of condensation of the ionized products in the metal dust fl ame in relation to the controlled synthesis of metal oxide nanoparticles was investigated in [5][6][7]. In [6] it is shown that in the conditions of metal dust fl ames, which are the source of metal oxide nanoparticles, nucleation is "fast" [1] .…”

Section: Nucleation In the Ionized Dusty Fl Amesmentioning

confidence: 99%

“…The great interest are unusual mechanisms of mass and heat transfer induced by the electric interaction between electrically charged particles of fuel and gas ions [4]. The complex plasma of the fuel combustion products makes the strong infl uence on the processes of condensation in fl ame [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Energy and Technological Aspects of the Combustion of Ionized Gas-Dispersed Systems

Poletaev¹,

Шевчук²,

Khlebnikova³

2016

Eur Chem Tech J

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This paper discusses the fl ame ionization effect on the combustion processes in gaseous suspensions of the dispersed fuels. It is shown that the two-phase fl ame ionization affects almost all the processes of the fuel conversion -kinetics of the dispersed fuel combustion, processes of the interphase heat and mass transfer, processes of the nucleation and coagulation in the fl ame, formation of nanoscale products of the metal particles combustion. It is shown that the electrostatic interaction between the charged nanoparticles and ions or polar molecules in the gaseous phase leads to the appearance of molecular "pumps" that can signifi cantly change the kinetics of the heterogeneous chemical reactions and the heat exchange between particles and gas. The infl uence of the thermal ionization of the fl ame on the nucleation mechanism and rate in gas-dispersed systems is discussed. The possibility of a barrier-free homogenous and heterogeneous nucleation in the dusty fl ame of metallic particles is shown. The effect of electrostatic and polarizing interactions of ions and molecules on the kinetics of the ternary gas-phase reactions is considered. The infl uence of the monodisperse aerosol ionization degree on the kinetics of its coagulation is analyzed. It is concluded that electrostatic interaction between the particles strongly affects the inhibition of the coagulation process in gas-phase combustion products and the possibility of very fast (explosive) charged particle coagulation of monodisperse aerosols. The possibility of the targeted size of metal oxides nanoparticles control, controlled ionizing of dusty fl ames and the role of ion particle entrainment, the dependency of their size of the fl ame ionization degree are discussed. Some effects arising in complex plasma of condensed combustion products under its own electric fi elds in fl ames, also when the burning dust is entrained into a constant electric fi eld and their practical applications for diagnosis are considered.

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Gas-disperse synthesis of metal oxide particles

Cited by 19 publications

References 34 publications

ZnO/polyaniline composite based photoluminescence sensor for the determination of acetic acid vapor

ZnO/polyaniline composite based photoluminescence sensor for the determination of acetic acid vapor

High-temperature synthesis of silica particles by the chloride method in the regime of counter flow jet quenching

Energy and Technological Aspects of the Combustion of Ionized Gas-Dispersed Systems

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