Photoluminescence and photocatalytic activity of zinc tungstate powders

• Authors: Larisa Gigorjeva , Donats Millers , Jānis Grabis , Dzidra Jankoviča
• Languages of publication: EN

Abstracts

EN

ZnWO4 powders with grain size in range 20 nm–10 µm have been synthesized by a simple combustion method and subsequent calcinations. The photocatalytic activities of powders were tested by degradation of methylene blue solution under UV light. The luminescence spectra and luminescence decay kinetics were studied and luminescence decay time dependence on average powder-grain size was obtained. The correlation between self-trapped exciton luminescence decay time and photocatalytic activity of ZnWO4 powders was shown. A model explaining the excitonic luminescence decay time correlation with photocatalytic activity was proposed.

Keywords

EN

photocatalysis; ZnWO4 ; nanopowders; luminescence

• Journal: Open Physics
• Year: 2011
• Volume: 9
• Issue: 2
• Pages: 510-514

Dates

published

1 - 4 - 2011

online

20 - 2 - 2011

Contributors

author

Larisa Gigorjeva

• Institute of Solid State Physic, University of Latvia, 8 Kengaraga, LV-1063, Riga, Latvia,

author

Donats Millers

• Institute of Solid State Physic, University of Latvia, 8 Kengaraga, LV-1063, Riga, Latvia

author

Jānis Grabis

• Institute of Inorganic Chemistry Physics, RTU, Miera 34, LV-2169, Salaspils, Latvia

author

Dzidra Jankoviča

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Identifiers

DOI

10.2478/s11534-010-0122-9