Study of Microwave Torch Plasmachemical Synthesis of Iron Oxide Nanoparticles Focused on the Analysis of Phase Composition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14740%2F14%3A00073661" target="_blank" >RIV/00216224:14740/14:00073661 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11090-014-9520-x" target="_blank" >http://dx.doi.org/10.1007/s11090-014-9520-x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11090-014-9520-x" target="_blank" >10.1007/s11090-014-9520-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of Microwave Torch Plasmachemical Synthesis of Iron Oxide Nanoparticles Focused on the Analysis of Phase Composition

Popis výsledku v původním jazyce

This work presents the results obtained on the single-step route towards the synthesis of iron oxide nanoparticles in a microwave plasma torch. The torch is supplied by 660 sccm of Ar mixed with 1 sccm of Fe(CO)(5) and a variable amount of O-2. The influence of oxygen addition on the phase composition of the synthesized powder was studied. Magnetite and maghemite phases could not be distinguished using the standard X-ray diffraction (XRD) analysis. Therefore, a combined XRD and Raman spectra analysis had to be applied, which is based on fitting of selected diffraction peaks and spectral features. According to XRD and Raman spectroscopy, the powder synthesized from Ar/Fe(CO)(5) consisted about 50 % of magnetite, Fe3O4, the rest being alpha-Fe and FeO. An increase in oxygen flow rate led to an increase in gamma-Fe2O3 percentage, at the expense of alpha-Fe, FeO and Fe3O4. Almost pure gamma-Fe2O3 was synthesized at oxygen flow rates 25-75x higher than the flow rate of Fe(CO)(5).

Název v anglickém jazyce

Study of Microwave Torch Plasmachemical Synthesis of Iron Oxide Nanoparticles Focused on the Analysis of Phase Composition

Popis výsledku anglicky

This work presents the results obtained on the single-step route towards the synthesis of iron oxide nanoparticles in a microwave plasma torch. The torch is supplied by 660 sccm of Ar mixed with 1 sccm of Fe(CO)(5) and a variable amount of O-2. The influence of oxygen addition on the phase composition of the synthesized powder was studied. Magnetite and maghemite phases could not be distinguished using the standard X-ray diffraction (XRD) analysis. Therefore, a combined XRD and Raman spectra analysis had to be applied, which is based on fitting of selected diffraction peaks and spectral features. According to XRD and Raman spectroscopy, the powder synthesized from Ar/Fe(CO)(5) consisted about 50 % of magnetite, Fe3O4, the rest being alpha-Fe and FeO. An increase in oxygen flow rate led to an increase in gamma-Fe2O3 percentage, at the expense of alpha-Fe, FeO and Fe3O4. Almost pure gamma-Fe2O3 was synthesized at oxygen flow rates 25-75x higher than the flow rate of Fe(CO)(5).

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Plasma Chemistry and Plasma Processing

ISSN

0272-4324

e-ISSN

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Svazek periodika

34

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

327-341

Kód UT WoS článku

000331001000007

EID výsledku v databázi Scopus

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