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Journal of Physical Studies 26(3), Article 3401 [4 pages] (2022)
DOI: https://doi.org/10.30970/jps.26.3401 POROUS ZINC OXIDE PLATE WITH MICRO- AND NANOELEMENTS OF THE SURFACE STRUCTURE FOR HETEROGENEOUS PHOTOCATALYSIS
L. Hrytsak1
1Ivan Franko National University of Lviv,
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The zinc oxide porous plate with micro- and nanoelements of the surface structure was obtained by sintering metallic zinc powder, characterized and tested for the photodegradation of model organic dye (methyl orange) in water. The kinetics of dye photodegradation was studied via measurement of variation of the optical density at the maximum observed for the dye at $465$ nm. After $30$ min of illumination, the photodegradation efficiency of methyl orange was found to be about $100$ \% when the ZnO plate with overall dimensions of $\mathrm{35 mm \times 7 mm \times 1 mm}$ was used. The reaction rate constant calculated using the first-order approximation was equal to $\mathrm{2.7 · 10^{-4} sec^{-1}}$. It is necessary to point out that the sample keeps its integrity after multiple experiments, which is important for practical applications. The obtained results evidently demonstrate the potential of the method of sintering metallic zinc powder for the production of efficient catalysts.
Key words: zinc oxide, heterogeneous photocatalysis, photodegradation, methyl orange, absorption spectroscopy.
