Comparable study of vermiculites from four commercial deposits prepared with fixed ceria nanoparticles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F18%3A10241308" target="_blank" >RIV/61989100:27360/18:10241308 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27640/18:10241308 RIV/61989100:27710/18:10241308

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0169131717304477" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0169131717304477</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.clay.2017.10.006" target="_blank" >10.1016/j.clay.2017.10.006</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Comparable study of vermiculites from four commercial deposits prepared with fixed ceria nanoparticles

Popis výsledku v původním jazyce

Four commercial macroscopic vermiculites (Ver) from different exploited deposits were investigated regarding their chemistry and structural transformation stage from mica (phlogopite), and compared with selected raw vermiculites and &quot;hydrobioties&quot; known from literature, in which the chemical analyzes verified the existence of iron as Fe3+ and Fe2+. Subsequently prepared vermiculite/ceria (Ver/CeO2) nanoparticles composites were compared from the point of view of the fixation of ceria nanoparticles by using stability test and regarding their photocatalytic activity in the decomposition of N2O. The experimental methods used for these studies were X-ray fluorescence spectrometry, atomic emission spectrometry, X-ray powder diffraction, infrared (FR-IR) and Raman spectroscopy and transmission electron microscopy with high resolution (HRTEM). Negative layer charge of vermiculites produced by the local charge balance and distribution of Fe3+ in tetrahedral and octahedral sheets were related to the CeO2 nanocrystals fixation and orientation. Among the four Ver/CeO2 nanoparticles composite samples, the vermiculite in sample Ver-C/CeO2 exhibited the highest negative layer charge. The CeO2 crystallites were the smallest among all four samples. HRTEM found separated CeO2 nanocrystallites and CeO2 agglomerates of differently oriented nanocrystallites. Such forms of CeO2 nanocrystals influenced the position of the Raman CeO2 F-28 and suppressed ability for photocatalytic N2O conversion.

Název v anglickém jazyce

Comparable study of vermiculites from four commercial deposits prepared with fixed ceria nanoparticles

Popis výsledku anglicky

Four commercial macroscopic vermiculites (Ver) from different exploited deposits were investigated regarding their chemistry and structural transformation stage from mica (phlogopite), and compared with selected raw vermiculites and &quot;hydrobioties&quot; known from literature, in which the chemical analyzes verified the existence of iron as Fe3+ and Fe2+. Subsequently prepared vermiculite/ceria (Ver/CeO2) nanoparticles composites were compared from the point of view of the fixation of ceria nanoparticles by using stability test and regarding their photocatalytic activity in the decomposition of N2O. The experimental methods used for these studies were X-ray fluorescence spectrometry, atomic emission spectrometry, X-ray powder diffraction, infrared (FR-IR) and Raman spectroscopy and transmission electron microscopy with high resolution (HRTEM). Negative layer charge of vermiculites produced by the local charge balance and distribution of Fe3+ in tetrahedral and octahedral sheets were related to the CeO2 nanocrystals fixation and orientation. Among the four Ver/CeO2 nanoparticles composite samples, the vermiculite in sample Ver-C/CeO2 exhibited the highest negative layer charge. The CeO2 crystallites were the smallest among all four samples. HRTEM found separated CeO2 nanocrystallites and CeO2 agglomerates of differently oriented nanocrystallites. Such forms of CeO2 nanocrystals influenced the position of the Raman CeO2 F-28 and suppressed ability for photocatalytic N2O conversion.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/LO1203" target="_blank" >LO1203: Regionální materiálově technologické výzkumné centrum - Program udržitelnosti</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

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

151

Číslo periodika v rámci svazku

january

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

164-174

Kód UT WoS článku

000417672100020

EID výsledku v databázi Scopus

2-s2.0-85031789178