Potassium Ferrite (KFeO2): Synthesis, Decomposition, and Application for Removal of Metals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F15%3A33155532" target="_blank" >RIV/61989592:15310/15:33155532 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1166/sam.2015.2143" target="_blank" >http://dx.doi.org/10.1166/sam.2015.2143</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1166/sam.2015.2143" target="_blank" >10.1166/sam.2015.2143</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Potassium Ferrite (KFeO2): Synthesis, Decomposition, and Application for Removal of Metals

Popis výsledku v původním jazyce

Potassium ferrite (KFeO2) was synthesized by a new simple thermal process from natural waste ferrihydrite and KNO3 precursors. The synthesized KFeO2 showed considerable instability when it was in contact with water and CO2 of the humid air. The decomposition of KFeO2 followed first-order kinetics with rate constants as 0.93 x 10(-1) h(-1) and 1.86 x 10(-1)h(-1) at relative humidity of 30-35% and 65-70%, respectively. The products of decomposition, crystalline KHCO3 and nanocrystalline iron(III) oxides in the molar ratio of 2:1, were characterized in detail by X-ray powder diffraction, low-temperature and in-field Fe-57 Mossbauer spectroscopy, magnetization (SQUID) measurements, thermal analysis, and scanning and transmission electron microscopy. Washing and subsequent air drying of the decomposed products of KFeO2 yielded monodisperse superparamagnetic maghemite (gamma-Fe2O3) nanoparticles, which turned out to be efficient as magnetic sorbents for removing Cu2+ in water. A direct addit

Název v anglickém jazyce

Potassium Ferrite (KFeO2): Synthesis, Decomposition, and Application for Removal of Metals

Popis výsledku anglicky

Potassium ferrite (KFeO2) was synthesized by a new simple thermal process from natural waste ferrihydrite and KNO3 precursors. The synthesized KFeO2 showed considerable instability when it was in contact with water and CO2 of the humid air. The decomposition of KFeO2 followed first-order kinetics with rate constants as 0.93 x 10(-1) h(-1) and 1.86 x 10(-1)h(-1) at relative humidity of 30-35% and 65-70%, respectively. The products of decomposition, crystalline KHCO3 and nanocrystalline iron(III) oxides in the molar ratio of 2:1, were characterized in detail by X-ray powder diffraction, low-temperature and in-field Fe-57 Mossbauer spectroscopy, magnetization (SQUID) measurements, thermal analysis, and scanning and transmission electron microscopy. Washing and subsequent air drying of the decomposed products of KFeO2 yielded monodisperse superparamagnetic maghemite (gamma-Fe2O3) nanoparticles, which turned out to be efficient as magnetic sorbents for removing Cu2+ in water. A direct addit

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická chemie

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

2015

Kód důvěrnosti údajů

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

Název periodika

Science of Advanced Materials

ISSN

1947-2935

e-ISSN

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Svazek periodika

7

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

579-587

Kód UT WoS článku

000349140200023

EID výsledku v databázi Scopus

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