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Optische und photokatalytische Eigenschaften von TiO 2 , modifiziert mit Oxiden und Gold
Author(s) -
Busko T.,
Dmytrenko O.,
Kulish M.,
Prylutskyy Y.,
Shokhovets S.,
Gobsch G.,
Vityuk N.,
Eremenko A.,
Tkach V.
Publication year - 2013
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.201300104
Subject(s) - materials science , photocatalysis , anatase , photodegradation , rhodamine b , scanning electron microscope , absorption (acoustics) , surface plasmon resonance , nanoparticle , doping , analytical chemistry (journal) , chemical engineering , nanotechnology , chemistry , optoelectronics , catalysis , organic chemistry , composite material , engineering
Films consisting of TiO 2 /ZrO 2 /SiO 2 undoped and doped with Au nanoparticles were synthesized by the sol‐gel method. The films were characterized with X‐ray diffraction (XRD), scanning electron microscopy (SEM), spectroscopic ellipsometry (SE) and optical absorption (OA) methods. The XRD study demonstrates the formation of TiO 2 anatase nanocrystals and Au nanoparticles. SE and OA measurements of the undoped films showed no significant absorption in the spectral range of 400–1000 nm. Doping with Au nanoparticles resulted in the appearance of a surface plasmon resonance (SPR) absorption band at 600 nm as well as weaker absorption bands in the 300–500 nm region. The observed changes in optical properties agreed with the enhanced photocatalytic activity of Au‐doped TiO 2 /ZrO 2 /SiO 2 films with gold compared to undoped films. The photocatalytic activity was evaluated by the photodegradation of the organic dye Rhodamine B. Under optimized conditions, the photodecomposition rate of the doped films was several times larger than that of the undoped films. Films of TiO 2 , TiO 2 /ZrO 2 /SiO 2 and ternary oxides were investigated.