Název: Study of photocatalytic activity of Zn.sub.x./sub.Cd.sub.1-x./sub.S quantum dots in dependence on their composition using methylene blue
Autoři: Praus, P. ; Svoboda, L. ; Hospodková, Alice ; Mamulová Kutláková, K.
Typ dokumentu: Příspěvky z konference
Konference/Akce: International Conference NANOCON /6./, Brno (CZ), 20141105
Rok: 2015
Jazyk: eng
Abstrakt: ZnCdS quantum dots (QDs) with the different composition 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 Schrodinger equation. The ZnCdS 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 ZnCdS 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 and at the same time the photocatalytic surface area was maximal.\n
Klíčová slova: photocatalysis; quantum dots; UV-VIS absorption; x-ray diffraction; ZnCdS
Zdrojový dokument: NANOCON 2014 Conference Proceedings, ISBN 978-80-87294-53-6

Instituce: Fyzikální ústav AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0281370

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-371588


Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Fyzikální ústav
Konferenční materiály > Příspěvky z konference