Photocatalitic Properties of TiO2 and ZnO Nanopowders

Latvian Journal of Physics and Technical Sciences 2013
Larisa Grigorjeva, J. Rikveilis, Jānis Grabis, Dzidra Jankoviča, C. Monty, Donāts Millers, Krišjānis Šmits

Photocatalytic activity of TiO2 and ZnO nanopowders is studied depending on the morphology, grain sizes and method of synthesizing. Photocatalysis of the prepared powders was evaluated by degradation of the methylene blue aqueous solution. Absorbance spectra (190-100 nm) were measured during exposure of the solution to UV light. The relationships between the photocatalytic activity and the particle size, crystal polymorph phases and grain morphology were analyzed. The photocatalytic activity of prepared TiO 2 nanopowders has been found to depend of the anatase-to-rutile phase ratio. Comparison is given for the photocatalytic activity of ZnO nanopowders prepared by sol-gel and solar physical vapour deposition (SPVD) methods.

Keywords
Nanopowders | Photocatalysis | Photocatalytic activity | TiO 2 | ZnO
DOI
10.2478/lpts-2013-0025
Hyperlink
http://www.degruyter.com/view/j/lpts.2013.50.issue-4/lpts-2013-0025/lpts-2013-0025.xml

Grigorjeva, L., Rikveilis, J., Grabis, J., Jankoviča, D., Monty, C., Millers, D., Šmits, K. Photocatalitic Properties of TiO2 and ZnO Nanopowders. Latvian Journal of Physics and Technical Sciences, 2013, Vol.50, No.4, pp.48-55. ISSN 0868-8257. Available from: doi:10.2478/lpts-2013-0025

Publication language
English (en)