Co-Precipitation of Fe—Cu Bimetal Oxalates in an Aqueous Solution and Their Thermally Induced Decomposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73607917" target="_blank" >RIV/61989592:15310/21:73607917 - isvavai.cz</a>

Výsledek na webu

<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202100581" target="_blank" >https://chemistry-europe.onlinelibrary.wiley.com/doi/epdf/10.1002/ejic.202100581</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ejic.202100581" target="_blank" >10.1002/ejic.202100581</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Co-Precipitation of Fe—Cu Bimetal Oxalates in an Aqueous Solution and Their Thermally Induced Decomposition

Popis výsledku v původním jazyce

This work focuses on the preparation of bimetal Fe−Cu oxalates by a co-precipitation reaction in an aqueous solution and subsequently on their thermally induced decomposition. The formation of solid solutions of Fe−Cu oxalates with various Fe/Cu ratios was studied by energy dispersive X-ray analysis, X-ray powder diffraction, transmission 57Fe Mössbauer spectroscopy, and scanning electron microscopy. The results suggest that the bimetal Fe−Cu oxalate precipitated in a structure similar to β-FeC2O4 ⋅ 2H2O. The maximum relative amount of Cu obtained within the bimetal oxalate was approximately 40 %. However, the single bimetal phase composition was obtained only for a limited range of Fe/Cu ratios. The Fe-rich samples contained also β-FeC2O4 ⋅ 2H2O, while the Cu-rich samples were predominantly composed of CuC2O4 ⋅ nH2O and contained much lower amounts of Fe than expected. The thermal decomposition of the prepared oxalate with the nominal Fe/Cu ratio of 65/35 was studied by in-situ X-ray powder diffraction in combination with ex-situ Mössbauer spectroscopy. The mixing of both metals at the molecular level allowed the preparation of copper ferrite particles at a relatively low temperature of 470 °C.

Název v anglickém jazyce

Co-Precipitation of Fe—Cu Bimetal Oxalates in an Aqueous Solution and Their Thermally Induced Decomposition

Popis výsledku anglicky

This work focuses on the preparation of bimetal Fe−Cu oxalates by a co-precipitation reaction in an aqueous solution and subsequently on their thermally induced decomposition. The formation of solid solutions of Fe−Cu oxalates with various Fe/Cu ratios was studied by energy dispersive X-ray analysis, X-ray powder diffraction, transmission 57Fe Mössbauer spectroscopy, and scanning electron microscopy. The results suggest that the bimetal Fe−Cu oxalate precipitated in a structure similar to β-FeC2O4 ⋅ 2H2O. The maximum relative amount of Cu obtained within the bimetal oxalate was approximately 40 %. However, the single bimetal phase composition was obtained only for a limited range of Fe/Cu ratios. The Fe-rich samples contained also β-FeC2O4 ⋅ 2H2O, while the Cu-rich samples were predominantly composed of CuC2O4 ⋅ nH2O and contained much lower amounts of Fe than expected. The thermal decomposition of the prepared oxalate with the nominal Fe/Cu ratio of 65/35 was studied by in-situ X-ray powder diffraction in combination with ex-situ Mössbauer spectroscopy. The mixing of both metals at the molecular level allowed the preparation of copper ferrite particles at a relatively low temperature of 470 °C.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

21001 - Nano-materials (production and properties)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

EUROPEAN JOURNAL OF INORGANIC CHEMISTRY

ISSN

1434-1948

e-ISSN

—

Svazek periodika

2021

Číslo periodika v rámci svazku

37

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

10

Strana od-do

3886-3895

Kód UT WoS článku

000693316600001

EID výsledku v databázi Scopus

2-s2.0-85114159322