Leaching test for calcined kaolinite and kaolinite/TiO2 photoactive composite

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F16%3A86099162" target="_blank" >RIV/61989100:27640/16:86099162 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/16:86099162

Výsledek na webu

<a href="http://dx.doi.org/10.1515/chempap-2016-0059" target="_blank" >http://dx.doi.org/10.1515/chempap-2016-0059</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1515/chempap-2016-0059" target="_blank" >10.1515/chempap-2016-0059</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Leaching test for calcined kaolinite and kaolinite/TiO2 photoactive composite

Popis výsledku v původním jazyce

Kaolinite is a suitable material for fixing TiO2 nanoparticles in a composite form. The kaolinite/TiO2 composite has promising photoactive properties which are as important as is the possible impact of the composite on the environment. Accordingly, the stability of the kaolinite/TiO2 composite dried at 105oC (KTI1) and calcined at 600oC (KTI6) and the stability of the original kaolinite treated at various temperatures (105-800oC) were studied by the leaching test in accordance with European standard BS EN 12457-2:2002 (British Standards Institution, 2002). The stability was evaluated on the basis of elements leached from the materials to extraction agents. Atomic emission spectrometry with inductively coupled plasma was used for determining the concentration of elements. In order to better understand the process of calcination and the structure changes in the kaolinite/TiO2 composite and calcined kaolinite, the materials were evaluated using X-ray powder diffraction and infrared spectroscopy with Fourier transformation. The processes of kaolinite dehydroxylation and metakaolinite formation were observed. Kaolinite is an appropriate carrier for composite preparation due to its stability even after its treatment at high temperatures. The experiments confirmed the TiO2 nanoparticles to be very strongly bound to the kaolinite surface. On the other hand, the experiments demonstrated that the presence of TiO2 on the kaolinite surface caused the release of Al in high concentrations to the final extracts, especially after kaolinite/TiO2 composite calcination. (C) 2016 Institute of Chemistry, Slovak Academy of Sciences.

Název v anglickém jazyce

Leaching test for calcined kaolinite and kaolinite/TiO2 photoactive composite

Popis výsledku anglicky

Kaolinite is a suitable material for fixing TiO2 nanoparticles in a composite form. The kaolinite/TiO2 composite has promising photoactive properties which are as important as is the possible impact of the composite on the environment. Accordingly, the stability of the kaolinite/TiO2 composite dried at 105oC (KTI1) and calcined at 600oC (KTI6) and the stability of the original kaolinite treated at various temperatures (105-800oC) were studied by the leaching test in accordance with European standard BS EN 12457-2:2002 (British Standards Institution, 2002). The stability was evaluated on the basis of elements leached from the materials to extraction agents. Atomic emission spectrometry with inductively coupled plasma was used for determining the concentration of elements. In order to better understand the process of calcination and the structure changes in the kaolinite/TiO2 composite and calcined kaolinite, the materials were evaluated using X-ray powder diffraction and infrared spectroscopy with Fourier transformation. The processes of kaolinite dehydroxylation and metakaolinite formation were observed. Kaolinite is an appropriate carrier for composite preparation due to its stability even after its treatment at high temperatures. The experiments confirmed the TiO2 nanoparticles to be very strongly bound to the kaolinite surface. On the other hand, the experiments demonstrated that the presence of TiO2 on the kaolinite surface caused the release of Al in high concentrations to the final extracts, especially after kaolinite/TiO2 composite calcination. (C) 2016 Institute of Chemistry, Slovak Academy of Sciences.

Druh

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

CEP obor

JI - Kompositní materiály

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Chemical papers

ISSN

0366-6352

e-ISSN

—

Svazek periodika

70

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

9

Strana od-do

1253-1261

Kód UT WoS článku

000378599000012

EID výsledku v databázi Scopus

2-s2.0-84974573906