Sol-gel Synthesis of Anatase Nanopowders for Efficient Photocatalytic Degradation of Herbicide Clomazone in Aqueous Media

Authors

  • Aleksandar Golubović Centre for Solid State Physics and New Materials, Institute of Physics, University of Belgrade
  • Bojana Simović Institute for Multidisciplinary Research, University of Belgrade
  • Slavica Gašić Institute of Pesticides and Environmental Protection
  • Dušan Mijin Faculty of Technology and Metallurgy, University of Belgrade
  • Aleksandar Matković Centre for Solid State Physics and New Materials, Institute of Physics, University of Belgrade
  • Biljana Babić Institute of Nuclear Sciences Vinča, University of Belgrade
  • Maja Šćepanović Centre for Solid State Physics and New Materials, Institute of Physics, University of Belgrade

Abstract

Commercial Mn-Zn powder (Mn0.63Zn0.37Fe2O4, 93 wt.% and Fe2O3 7 wt.%) was milled 0.5, 1, 2 and 4 hours in a planetary ball mill. The goal was to observe intensive milling influences on oxidation and reduction processes that will happen during subsequent heating. Powders were characterized with XRD, SEM and particle sizer. Subsequent heating was monitored on TGA/DTA in an air atmosphere. After compaction of the milled powders, sintering was also performed in a dilatometric device. Sintered specimens were characterized micro structurally with SEM on a fresh breakage. Obtained differential TGA diagrams suggest intensive changes during prolonged milling of the oxidation kinetics on heating. Ferrite powders changed with milling as well as with second run heating were characterized to enable determination of the potentially best ratio of milling and heating to be applied to obtain the desired microstructure.

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Published

2017-12-13

Issue

Vol. 49 No. 3 (2017)

Section

Articles