Influence of the decomposed substrates on the photocatalytic activity of the titanium dioxide modified by silver nanoparticles

• Autorzy: Wodka, D. , Bielańska, E. , Socha, R. P. , Nowak, P. , Warszyński, P.
• Języki publikacji: EN

Abstrakty

EN

Photocatalytic activity of Ag/TiO2 composites obtained by photoreduction treatment (PRT) was investigated. The composite materials, containing 1.0 and 2.1 wt% of silver nanoparticles were obtained by depositing silver on the Evonic-Degussa P25 titania surface. Ag/TiO2 samples were examined by SEM, XPS and BET techniques. The XPS measurements revealed that silver particles were obtained mainly in metallic form. The photocatalytic activity of pure P25 and Ag/TiO2 composites was compared in photooxidation reaction of some model compound like: formic acid (FA), rhodamine B (RhB) and methylene blue (MB). Photodecomposition reaction was investigated in a batch reactor containing aqueous suspension of a photocatalyst illuminated by either UV or artificial sunlight (halogen lamp). The tests proved that small amount of silver nanoparticles deposited on titania surface triggers the increase in photocatalytic activity, this increase depends however on the type of substrate. The relation between the type of substrate and the activity of the composite was discussed.

Słowa kluczowe

EN

titanium dioxide; photocatalysis; silver nanoparticles; organic dyes

• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2010
• Tom: Vol. 45
• Strony: 99-112
• Opis fizyczny: Bibliogr. 46 poz.

Twórcy

autor

Wodka, D.

autor

Bielańska, E.

autor

Socha, R. P.

autor

Nowak, P.

autor

Warszyński, P.

• Institute of Catalysis and Surface Chemistry, PAS, 30 – 239 Kraków, Poland,

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