Preparation and properties of a new composite photocatalyst based on nanosized titanium dioxide

Ševčík, Peter, Čík, Gabriel, Vlna, Tomáš and Mackul’ak, Tomáš Preparation and properties of a new composite photocatalyst based on nanosized titanium dioxide Chemical Papers, Vol.63, No. 2, 2009, 249-254

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Ševčík, Peter
Čík, Gabriel
Vlna, Tomáš
Mackul’ak, Tomáš
Title Preparation and properties of a new composite photocatalyst based on nanosized titanium dioxide
Journal name Chemical Papers
Publication date 2009
Year available 2009
Volume number 63
Issue number 2
ISSN 0366-6352
Start page 249
End page 254
Place of publication Poland
Publisher Versita
Collection year 2009
Language english
Subject 290000 Engineering and Technology
291100 Environmental Engineering
Abstract/Summary The use of photocatalysts supported on adsorbents is receiving substantial attention. Supporting TiO2 with zeolites is found to be one of the best solutions to increase the efficiency of TiO2-based photocatalysts. This work was focused on simple preparation of a TiO2/Na-ZSM-5 composite catalyst by the solid state dispersion (SSD) method and its modification with an organic photosensitizer — polythiophene (PT). Using the XRD diffractometry, structure of the new composite catalyst was proved. Beside this composite catalyst, mechanical mixtures of TiO2-based catalysts with Na-ZSM-5 zeolite were prepared. The efficiency of all five available photocatalysts (TiO2, TiO2-PT, mechanical mixture of TiO2 + Na-ZSM-5, mechanical mixture of TiO2-PT + Na-ZSM-5, and the modified SSD-PT composite) on photodegradation of 4-chlorophenol was compared. By measuring the formation of chloride ions and decreasing the 4-chlorophenol concentration at two different initial concentrations of 4-chlorophenol in the basic aqueous solution, the photoefficiency and adsorption properties of our photocatalysts were determined.
 
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