- Tytuł:
- Simultaneous photooxidation and photoreduction of phenol and Cr(VI) ions using titania modified with nanosilica
- Autorzy:
-
Kądziołka, Daria
Grzechulska-Damszel, Joanna
Schmidt, Beata - Powiązania:
- https://bibliotekanauki.pl/articles/2174823.pdf
- Data publikacji:
- 2022
- Wydawca:
- Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
- Tematy:
-
photocatalysis
titanium dioxide
nanosilica
water purification - Opis:
- The photocatalytic process of phenol oxidation and Cr(VI) reduction in the presence of nano-silica modified titania was carried out. The activity of composites was tested using two different light sources. The photocatalysts with 10% of nanosilica showed the highest activity. The calcination temperature (200–800 °C) significantly determined the sensitivity of the obtained materials to the light source used. Photocatalysts alternately adsorbed and desorbed Cr(VI) ions from the reaction mixture during irradiation. In the one-component mixture, complete oxidation of phenol was observed using material calcined at 650 °C, after 3 h of UV-VIS irradiation. In the reaction mixture of Cr(VI) and phenol, the highest activity was demonstrated by photocatalyst calcined at 300 °C. The concentration of phenol decreased in proportion to the decrease of chromium ions. The obtained titania-silica composites showed oxidizing properties towards phenol and reductive properties toward Cr(VI) ions.
- Źródło:
-
Polish Journal of Chemical Technology; 2022, 24, 4; 23--29
1509-8117
1899-4741 - Pojawia się w:
- Polish Journal of Chemical Technology
- Dostawca treści:
- Biblioteka Nauki
Artykuł