Original title: Photocatalytic activity of ZnxCd.sub.1-x./sub.S quantum dots in dependence on their composition
Authors: Praus, P. ; Svoboda, L. ; Hospodková, Alice ; Mamulová-Kutláková, K.
Document type: Papers
Conference/Event: International Conference NANOCON /6./, Brno (CZ), 2014-11-05 / 2014-11-07
Year: 2014
Language: eng
Abstract: 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.
Keywords: photocatalysis; quantum dots; ZnCdS
Host item entry: NANOCON 2014 Conference Proceedings, ISBN 978-80-87294-55-0

Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0238774

Permalink: http://www.nusl.cz/ntk/nusl-177639


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