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2013 | 11 | 11 | 1780-1785
Article title

Effects of mechanical activation on structure and photocatalytic properties of ZnO powders

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EN
Abstracts
EN
Zinc oxide (ZnO) was mechanically activated in air using a planetary ball mill using varying milling speeds and time. The obtained samples were analyzed by X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and UV-Vis diffusion reflectance spectroscopy. The photocatalytic activity of the mechanically treated ZnO powders were investigated in the reaction of Malachite Green (MG) degradation in aqueous solution under UV-light irradiation. A decrease in the crystallite size (from 90 to 10 nm) accompanied by an increase of microstrains and lattice parameters were established applying different milling speeds. The agglomeration of the particles was observed by SEM analysis. The absorption spectra of the initial and mechanically activated ZnO samples show shifting of the band position from 360 to 330 nm, which can be related to decrease in the crystalline size. The ZnO powders activated at lower milling speeds (for shorter time intervals) exhibit highest photocatalytic activity. [...]
Publisher

Journal
Year
Volume
11
Issue
11
Pages
1780-1785
Physical description
Dates
published
1 - 11 - 2013
online
25 - 8 - 2013
Contributors
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria, mancheva@svr.igic.bas.bg
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • University of Chemical Technology and Metallurgy, 1756, Sofia, Bulgaria
author
  • Rostislaw Kaischew, Institute of Physical Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Geological Institute, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0314-4
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