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2013 | 11 | 7 | 1055-1065
Tytuł artykułu

Microwave-assisted and conventional sol-gel preparation of photocatalytically active ZnO/TiO2/glass multilayers

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
For the first time a combination of microwaves and/or the conventional treatment method was used to dry and heat multilayered sol-gel ZnO/TiO2/glass structures. Compact or porous TiO2 films were deposited as a bottom layer, covered with a ZnO film. The structures were characterized by X-ray Diffraction (XRD), Energy Dispersive X-ray Spectroscopy (EDX) and Scanning Electron Microscopy (SEM). Only peaks of wurtzite ZnO crystalline phase were registered on the X-Ray diffractograms. The microwave irradiation leads to a formation of poorly crystallized multilayers with very small crystallites and enhanced surface roughness. This results in a better photocatalytic activity of these structures than the structures of the samples treated conventionally. It was established that the morphology of the bottom titania layer affects the reaction of photocatalytic degradation of Malachite Green dye (MG). The structures with the compact bottom TiO2 films showed higher activities than those on porous TiO2 films. This study offers an energy saving method of producing ZnO/TiO2/glass multilayered structures of various morphologies and pronounced photocatalytic properties. The method does not involve any calcination step, normally applied to achieve a good degree of crystallization. This makes the method suitable for protecting substrates of low thermal stability. [...]
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Wydawca

Czasopismo
Rocznik
Tom
11
Numer
7
Strony
1055-1065
Opis fizyczny
Daty
wydano
2013-07-01
online
2013-04-26
Twórcy
autor
  • Laboratory of Nanoparticle Science and Technology, Faculty of Chemistry and Pharmacy, University of Sofia, 1164, Sofia, Bulgaria, nina_k@abv.bg
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Institute of Catalysis, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
  • Institute of Electrochemistry and Energy Systems, Bulgarian Academy of Sciences, 1113, Sofia, Bulgaria
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0240-5
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