Název: Photocatalytic activity of ZnxCd.sub.1-x./sub.S quantum dots in dependence on their composition
Autoři: Praus, P. ; Svoboda, L. ; Hospodková, Alice ; Mamulová-Kutláková, K.
Typ dokumentu: Příspěvky z konference
Konference/Akce: International Conference NANOCON /6./, Brno (CZ), 2014-11-05 / 2014-11-07
Rok: 2014
Jazyk: eng
Abstrakt: ZnxCd1-xS quantum dots (QDs) with the different composition x were prepared by precipitation of Zn and Cd acetates with sodium sulphide from aqueous colloid dispersions. Transition energies of these QDs were determined from UV-VIS spectra of the QDs colloid dispersions and consequently used for calculation of the QDs sizes according to the Schrödinger equation. The ZnCdS QDs size was found to be significantly influenced by their composition, decreased with increasing the Zn content. The QDs were also characterized by TEM, X-ray powder diffraction and PL. The photocatalytic activity of the QDs was studied using the methylene blue decomposition under UV irradiation with the maximum intensity of 365 nm. Different photocatalytic activity depending on the composition x was observed. Quantum levels of the QDs have important influence on their photocatalytic activity as a result of quantum size effect. The maximal photocatalytic activity was achieved for x=0.6.
Klíčová slova: photocatalysis; quantum dots; ZnCdS
Zdrojový dokument: NANOCON 2014 Conference Proceedings, ISBN 978-80-87294-55-0

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/11104/0238774

Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-177639


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