|
|||||
|
|
Structural peculiarities of TiO2 and Pt/TiO2 catalysts for the photocatalytic oxidation of aqueous solution of Acid Orange 7 Dye upon ultraviolet light |
|
| Authors: | Galina N. Kryukova, Galina A. Zenkovets, Alexei A. Shutilov, Michael Wilde, Kerstin Gü nther, Dieter Fassler,Klaus Richter |
| Affiliation: | aBoreskov Institute of Catalysis of SB RAS, pr. Lavrentieva 5, 630090 Novosibirsk, Russia bGNF e.V., Volmerstrasse 7B, D-12489 Berlin-Adlershof, Germany cGMBU e.V., Felsbachstrasse 7, D-07745 Jena, Germany |
| Abstract: | TiO2 (anatase) with different microstructure was synthesized by thermal hydrolysis of the titanyl sulfate and studied by X-ray powder diffraction, high resolution transmission electron microscopy and UV–vis diffuse reflectance spectroscopy. The effect of titanium dioxide structure, regular or distorted, on the photocatalytic degradation of Acid Orange 7 Dye (AO7) in water upon ultraviolet light was studied. It was found that synthesized TiO2 possesses a relatively high reactivity when illuminated but also show different adsorption in the dark. The relationship between these behaviors depends on the real structure of the catalysts. Catalysts with a perfect structural ordering formed after heating at temperature higher than 500 °C show better photocatalytic performance. Small amount of Pt added into the TiO2 structure was found to improve further the catalyst reactivity. Pt-modified titania catalysts oxidize AO7 more efficiently than P-25 Degussa TiO2. Doping effect of Pt on the structural and photocatalytic properties of the samples is discussed. |
| Keywords: | Anatase Doping of S and Pt Structure Photocatalysis Oxidation of Acid Orange 7 Dye |
| 本文献已被 ScienceDirect 等数据库收录！ | |