Thermal decomposition of ammonium ferrocyanide, (NH4)4[Fe(CN)6], in air

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33161443" target="_blank" >RIV/61989592:15310/16:33161443 - isvavai.cz</a>

Výsledek na webu

<a href="http://aip.scitation.org/doi/pdf/10.1063/1.4966001" target="_blank" >http://aip.scitation.org/doi/pdf/10.1063/1.4966001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4966001" target="_blank" >10.1063/1.4966001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Thermal decomposition of ammonium ferrocyanide, (NH4)4[Fe(CN)6], in air

Popis výsledku v původním jazyce

Thermal decomposition of ammonium ferrocyanide, (NH4)4[Fe(CN)6], was investigated by means of thermal analysis and 57Fe Mössbauer spectroscopy. Thermal analysis (TG and DSC) showed multistep decomposition mechanism with the total mass loss of 70% corresponding to complete transformation of the precursor to Fe2O3. Ammonium ferrocyanide was heated in a furnace starting from room temperature up to selected temperature in the range from 60 oC to 350 oC. After the heat treatment up to given temperature, the sample was characterized by room temperature Mössbauer spectroscopy. The decomposition mechanism is based on a sequential formation of (NH4)3[Fe(III)(CN)6], (NH4)3[Fe(II)(CN)5], Fe4(III)[Fe(II)(CN)6]3 (Prussian Blue), and finally Fe2O3. Mössbauer spectroscopy allowed to determine valence states of Fe atoms in the phases unambiguously. Thermal decomposition of ammonium ferrocyanide thus presents a simple method of synthesis of Prussian Blue nanoparticles as well as amorphous Fe2O3 nanoparticles. Amorphous Fe2O3 can be further crystallized to β-Fe2O3, γ-Fe2O3 and/or α-Fe2O3 polymorphs.

Název v anglickém jazyce

Thermal decomposition of ammonium ferrocyanide, (NH4)4[Fe(CN)6], in air

Popis výsledku anglicky

Thermal decomposition of ammonium ferrocyanide, (NH4)4[Fe(CN)6], was investigated by means of thermal analysis and 57Fe Mössbauer spectroscopy. Thermal analysis (TG and DSC) showed multistep decomposition mechanism with the total mass loss of 70% corresponding to complete transformation of the precursor to Fe2O3. Ammonium ferrocyanide was heated in a furnace starting from room temperature up to selected temperature in the range from 60 oC to 350 oC. After the heat treatment up to given temperature, the sample was characterized by room temperature Mössbauer spectroscopy. The decomposition mechanism is based on a sequential formation of (NH4)3[Fe(III)(CN)6], (NH4)3[Fe(II)(CN)5], Fe4(III)[Fe(II)(CN)6]3 (Prussian Blue), and finally Fe2O3. Mössbauer spectroscopy allowed to determine valence states of Fe atoms in the phases unambiguously. Thermal decomposition of ammonium ferrocyanide thus presents a simple method of synthesis of Prussian Blue nanoparticles as well as amorphous Fe2O3 nanoparticles. Amorphous Fe2O3 can be further crystallized to β-Fe2O3, γ-Fe2O3 and/or α-Fe2O3 polymorphs.

Druh

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

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/LO1305" target="_blank" >LO1305: Rozvoj centra pokročilých technologií a materiálů</a><br>

Návaznosti

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

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

AIP Conference Proceedings

ISSN

0094-243X

e-ISSN

—

Svazek periodika

1781

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

"020005-1"-"020005-6"

Kód UT WoS článku

000389509200005

EID výsledku v databázi Scopus

—