Cordierite/CeO2 ceramic nanocomposites from vermiculite with fixed CeO2 nanoparticles, talc and kaolin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F19%3A10242403" target="_blank" >RIV/61989100:27360/19:10242403 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/19:10242403 RIV/61989100:27710/19:10242403

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S016913171930208X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S016913171930208X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2019.105150" target="_blank" >10.1016/j.clay.2019.105150</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cordierite/CeO2 ceramic nanocomposites from vermiculite with fixed CeO2 nanoparticles, talc and kaolin

Popis výsledku v původním jazyce

Ceria-based metal oxides are promising redox materials for photocatalytic decomposition of N2O emissions. The objective of this work was to evaluate the structural properties of cordierite ceramics with anchored CeO2 nanoparticles produced by sintering talc, kaolin and vermiculite with CeO2 nanoparticles precursor. In this contribution, we discuss the effect of the presence of CeO2 nanoparticles on the softening and crystallization temperatures of cordierite, and the influence of the sintering procedure on the microstructure properties of the anchored CeO2 nanocrystals. The materials were characterized by X-ray diffraction analysis, differential thermal analysis and morphology of ceria nanoparticles was visualized in a high-resolution transmission electron microscope (HRTEM). The chemical interactions between CeO2 and the clay minerals were investigated using energy dispersive X-ray spectroscopy in the scanning transmission electron microscope (STEM) and complemented by the Raman measurements. X-ray diffraction revealed that the sintered ceramics contain cordierite-indialite, orthoenstatite and protoenstatite. Differential thermal analysis showed that the addition of 3 mass% of CeO2 decreases the softening and the crystallization temperature of cordierite by approximately 50 degrees C. HRSTEM/EDS observed the Fe concentration of CeO2 nanoparticles, probably due to migration of Fe3+ ions from vermiculite in crystallizing cordierite. The hypothesis of Fe dopant in ceria was proven by local chemical analysis, which was performed with the aid of an EDX line scan in the HRSTEM, by the shift of the Raman CeO2 F-2g mode to lower wavenumbers and by the presence of a Raman band from oxygen vacancies.

Název v anglickém jazyce

Cordierite/CeO2 ceramic nanocomposites from vermiculite with fixed CeO2 nanoparticles, talc and kaolin

Popis výsledku anglicky

Ceria-based metal oxides are promising redox materials for photocatalytic decomposition of N2O emissions. The objective of this work was to evaluate the structural properties of cordierite ceramics with anchored CeO2 nanoparticles produced by sintering talc, kaolin and vermiculite with CeO2 nanoparticles precursor. In this contribution, we discuss the effect of the presence of CeO2 nanoparticles on the softening and crystallization temperatures of cordierite, and the influence of the sintering procedure on the microstructure properties of the anchored CeO2 nanocrystals. The materials were characterized by X-ray diffraction analysis, differential thermal analysis and morphology of ceria nanoparticles was visualized in a high-resolution transmission electron microscope (HRTEM). The chemical interactions between CeO2 and the clay minerals were investigated using energy dispersive X-ray spectroscopy in the scanning transmission electron microscope (STEM) and complemented by the Raman measurements. X-ray diffraction revealed that the sintered ceramics contain cordierite-indialite, orthoenstatite and protoenstatite. Differential thermal analysis showed that the addition of 3 mass% of CeO2 decreases the softening and the crystallization temperature of cordierite by approximately 50 degrees C. HRSTEM/EDS observed the Fe concentration of CeO2 nanoparticles, probably due to migration of Fe3+ ions from vermiculite in crystallizing cordierite. The hypothesis of Fe dopant in ceria was proven by local chemical analysis, which was performed with the aid of an EDX line scan in the HRSTEM, by the shift of the Raman CeO2 F-2g mode to lower wavenumbers and by the presence of a Raman band from oxygen vacancies.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

<a href="/cs/project/EF16_019%2F0000853" target="_blank" >EF16_019/0000853: Institut environmentálních technologií - excelentní výzkum</a><br>

Návaznosti

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

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Applied Clay Science

ISSN

0169-1317

e-ISSN

—

Svazek periodika

179

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000479025400008

EID výsledku v databázi Scopus

2-s2.0-85066442490