Modification of microwave assisted preparation of FexOy nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F18%3A10240968" target="_blank" >RIV/61989100:27640/18:10240968 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2214785318309532?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2214785318309532?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matpr.2018.05.057" target="_blank" >10.1016/j.matpr.2018.05.057</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modification of microwave assisted preparation of FexOy nanoparticles

Popis výsledku v původním jazyce

During the recent several years, several preparation methods of FexOy micro and nanoparticles and composites of FexOy/phylosilicate were developed. The simple microwave-assisted synthesis of FexOy from FeSO4.7H2O has been tested recently. Both in magnetite (Fe3O4) and maghemite (γ-Fe2O3) have been proved in prepared FexOy particles. The goal was to prepare a micro and nanoparticles with higher Fe3O4 content. For this purpose, the iron nanoparticles were prepared using the FeSO4.7H2O with the addition of oxalic acid during the iron oxides precipitation. The syntheses were carried out under various conditions (pH of precipitation, amount of added oxalic acid, time of microwave activity). The prepared micro and nanoparticles were characterized by X-ray diffraction, chemical analyses, scanning and transmission electron microscopy, and magnetic properties measurement. The results showed that pH and addition of oxalic acid affected the content of FeO in prepared nanoparticles but the wüstite (FeO) was not identified and, as the result, the magnetic properties were changed. In contrast to the spherical iron oxides nanoparticles prepared using the unmodified method, resulting nanoparticles were of cylindrical shape when the oxalic acid was present.

Název v anglickém jazyce

Modification of microwave assisted preparation of FexOy nanoparticles

Popis výsledku anglicky

During the recent several years, several preparation methods of FexOy micro and nanoparticles and composites of FexOy/phylosilicate were developed. The simple microwave-assisted synthesis of FexOy from FeSO4.7H2O has been tested recently. Both in magnetite (Fe3O4) and maghemite (γ-Fe2O3) have been proved in prepared FexOy particles. The goal was to prepare a micro and nanoparticles with higher Fe3O4 content. For this purpose, the iron nanoparticles were prepared using the FeSO4.7H2O with the addition of oxalic acid during the iron oxides precipitation. The syntheses were carried out under various conditions (pH of precipitation, amount of added oxalic acid, time of microwave activity). The prepared micro and nanoparticles were characterized by X-ray diffraction, chemical analyses, scanning and transmission electron microscopy, and magnetic properties measurement. The results showed that pH and addition of oxalic acid affected the content of FeO in prepared nanoparticles but the wüstite (FeO) was not identified and, as the result, the magnetic properties were changed. In contrast to the spherical iron oxides nanoparticles prepared using the unmodified method, resulting nanoparticles were of cylindrical shape when the oxalic acid was present.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

<a href="/cs/project/GA13-13709S" target="_blank" >GA13-13709S: Magnetické kompozitní materiály pro odstraňování polutantů</a><br>

Návaznosti

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

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název statě ve sborníku

Materials Today: Proceedings. Volume 5, Supplement 1

ISBN

—

ISSN

2214-7853

e-ISSN

—

Počet stran výsledku

9

Strana od-do

52-60

Název nakladatele

Elsevier

Místo vydání

Amsterdam

Místo konání akce

Ostrava

Datum konání akce

22. 5. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000482182400008