Study of photocatalytic activity of ZnxCd1-xS quantum dots in dependence on their composition using methylene blue

Kód výsledku v IS VaVaI

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Nalezeny alternativní kódy

RIV/61989100:27640/15:86095313 RIV/61989100:27710/15:86095313 RIV/68378271:_____/15:00486601

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Study of photocatalytic activity of ZnxCd1-xS quantum dots in dependence on their composition using methylene blue

Popis výsledku v původním jazyce

ZnxCd1-xS quantum dots (QDs) with the different composition x were prepared by precipitation of zinc and cadmium acetates with sodium sulphide in the presence of cetyltrimethylammonium bromide (CTAB) used for stabilization of their aqueous colloid dispersions. Transition energies of these quantum dots were determined from the UV-VIS spectra of QDs colloid dispersions and consequently used for calculation of the QDs sizes according to the Schrödinger equation. The ZnxCd1-xS QDs size was found to be significantly influenced by their composition: the QDs size decreased with the increasing Zn content. The photocatalytic activity of the ZnxCd1-xS QDs was studied using the methylene blue decomposition under UV irradiation. Different photocatalytic activity depending on the composition x was observed and explained. The maximal photocatalytic activity was achieved for x = 0.6 when the energy of the irradiation photons was still sufficient to generate electron-hole pairs in majority of the QDs

Název v anglickém jazyce

Study of photocatalytic activity of ZnxCd1-xS quantum dots in dependence on their composition using methylene blue

Popis výsledku anglicky

ZnxCd1-xS quantum dots (QDs) with the different composition x were prepared by precipitation of zinc and cadmium acetates with sodium sulphide in the presence of cetyltrimethylammonium bromide (CTAB) used for stabilization of their aqueous colloid dispersions. Transition energies of these quantum dots were determined from the UV-VIS spectra of QDs colloid dispersions and consequently used for calculation of the QDs sizes according to the Schrödinger equation. The ZnxCd1-xS QDs size was found to be significantly influenced by their composition: the QDs size decreased with the increasing Zn content. The photocatalytic activity of the ZnxCd1-xS QDs was studied using the methylene blue decomposition under UV irradiation. Different photocatalytic activity depending on the composition x was observed and explained. The maximal photocatalytic activity was achieved for x = 0.6 when the energy of the irradiation photons was still sufficient to generate electron-hole pairs in majority of the QDs

Druh

D - Stať ve sborníku

CEP obor

JI - Kompositní materiály

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)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název statě ve sborníku

NANOCON 2014: 6th International Conference, November 5th-7th 2014, Hotel Voronez I, Brno, Czech Republic, EU

ISBN

978-80-87294-53-6

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

135-140

Název nakladatele

Tanger

Místo vydání

Ostrava

Místo konání akce

Brno

Datum konání akce

5. 11. 2014

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

000350636300022