Photoactive nanocomposites of ZnO/clay type

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27640%2F16%3A86095098" target="_blank" >RIV/61989100:27640/16:86095098 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989100:27740/16:86095098

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Photoactive nanocomposites of ZnO/clay type

Popis výsledku v původním jazyce

This study is focused on ZnO/clay photoactive nanocomposites where ZnO nanoparticles are the photoactive components and the clay serves as a cheap and chemically stable matrix on which the ZnO nanoparticles are anchored. Anchoring nanoparticles on the matrix is often used method allowing easier handling of the nanocomposite (clay particles are of micrometric sizes) in comparison with pure nanoparticles. Moreover, nanoparticles anchored on the matrix do not represent such an environmental and healts risks (due to the reduced mobility) as pure nanoparticles. Two clays were used in this study: kaoline KKAF and Moroccan clay ghassoul, unique mixture of stevensite and sepiolite, from Jebel Ghassoul deposit in Morocco. Photoactive nanocomposites were prepared from ZnCl2 and NaOH precursors using a simple hydrothermal method. Resulting samples were dried and calcined at 600 oC for 1 h. The precursors:clay ratios were chosen so that the nanocomposites contained 50 wt.% of ZnO. Nanocomposites were characterized using X-ray powder diffraction, UV-VIS diffuse reflectance spectroscopy, and scanning electron microscopy techniques. Photodegradation activities were evaluated by discoloration of acid orange 7 aqueous solutions under UV irradiation. Sizes of crystallites and band gap energies were determined. Mutual comparison of the properties of both nanocomposites and also the comparison with pure ZnO nanoparticles were carried out.

Název v anglickém jazyce

Photoactive nanocomposites of ZnO/clay type

Popis výsledku anglicky

This study is focused on ZnO/clay photoactive nanocomposites where ZnO nanoparticles are the photoactive components and the clay serves as a cheap and chemically stable matrix on which the ZnO nanoparticles are anchored. Anchoring nanoparticles on the matrix is often used method allowing easier handling of the nanocomposite (clay particles are of micrometric sizes) in comparison with pure nanoparticles. Moreover, nanoparticles anchored on the matrix do not represent such an environmental and healts risks (due to the reduced mobility) as pure nanoparticles. Two clays were used in this study: kaoline KKAF and Moroccan clay ghassoul, unique mixture of stevensite and sepiolite, from Jebel Ghassoul deposit in Morocco. Photoactive nanocomposites were prepared from ZnCl2 and NaOH precursors using a simple hydrothermal method. Resulting samples were dried and calcined at 600 oC for 1 h. The precursors:clay ratios were chosen so that the nanocomposites contained 50 wt.% of ZnO. Nanocomposites were characterized using X-ray powder diffraction, UV-VIS diffuse reflectance spectroscopy, and scanning electron microscopy techniques. Photodegradation activities were evaluated by discoloration of acid orange 7 aqueous solutions under UV irradiation. Sizes of crystallites and band gap energies were determined. Mutual comparison of the properties of both nanocomposites and also the comparison with pure ZnO nanoparticles were carried out.

Druh

D - Stať ve sborníku

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/ED1.1.00%2F02.0070" target="_blank" >ED1.1.00/02.0070: Centrum excelence IT4Innovations</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

2016

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANOCON 2015 : 7th international conference : conference proceedings : (reviewed version) : October 14th-16th 2015, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-63-5

ISSN

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e-ISSN

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Počet stran výsledku

5

Strana od-do

196-200

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

14. 10. 2015

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000374708800034