THE TiO2/Au NANOSYSTEM IMMOBILIZED IN CHITOSAN MATRIX AND ITS PHOTOCATALITIC PROPERTIES

The influence of HCl and H₂O concentration on the size of titanium dioxide particles formed in isopropyl alcohol medium from tetraisopropoxide using sol-gel technology was investigated. It was found that the dependence has an extreme character. The doping of TiO₂ particles ~ 50 nm in size by gold nanoparticles obtained by UV reduction of HAuCl₄ in solutions of the polymer stabilizer – chitosan was performed. The developed TiO₂/Auchitosan systems have high photocatalytic activity in a wide range of wavelengths, which is confirmed by the decomposition of methylene orange by 80–90 % in aqueous solution.

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