EFFECT OF LA DOPANT ON THE PHOTOCATALYTIC EFFICIENCY OF ACTIVATED ZNO NANOPOWDERS
Katya Milenova, Alexander Eliyas, Vladimir Blaskov, Irina Stambolova, Boris Kunev, Slavcho Rakovsky
Pages: 265-271
Published: 2 Jun 2014
Views: 2,852
Downloads: 824
Abstract: Activated ZnO powder was obtained by an original patented procedure and doped with 0.5, 1 and 1.5 wt % La to improve the photocatalytic performance. The crystalline structure, surface morphology and specific surface area were investigated by X-ray diffractometer (XRD), scanning electron microscopy (SEM) and single point Brunauer-Emmett-Teller (BET) method. The XRD analysis of the oxide samples illustrates the formation of wurtzite ZnO. Increasing of La concentration results in higher degree crystallinity of the doped ZnO samples. The doped and non-doped ZnO crystallite sizes are in the range of 54รท57nm. Doping with La leads to increase of specific surface area compared to non-doped ZnO. The course of the photocatalytic reaction was followed spectrophotometrically based on the maximum absorbance wavelength of the model pollutant Reactive Black 5 (RB5). The samples doped with 1.5 wt % La exhibited the highest efficiency for the photocatalytic degradation of RB5 under UV illumination due to the higher degree of crystallinity, formation of solid solution and higher specific surface area.
Keywords: la-doped zno nanoparticles, photocatalysis, reactive black 5 azodye, waste water discoloration
Cite this article: Katya Milenova, Alexander Eliyas, Vladimir Blaskov, Irina Stambolova, Boris Kunev, Slavcho Rakovsky. EFFECT OF LA DOPANT ON THE PHOTOCATALYTIC EFFICIENCY OF ACTIVATED ZNO NANOPOWDERS. Journal of International Scientific Publications: Materials, Methods & Technologies 8, 265-271 (2014). https://www.scientific-publications.net/en/article/1000171/
Download full text
Back to the contents of the volume
© 2024 The Author(s). This is an open access article distributed under the terms of the
Creative Commons Attribution License https://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. This permission does not cover any third party copyrighted material which may appear in the work requested.
Disclaimer: The opinions and claims presented in this article are solely those of the authors and do not necessarily reflect the views of their affiliated organizations, the publisher, editors, or reviewers.
