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Type of publication: research article
Type of publication (PDB): Straipsnis Clarivate Analytics Web of Science / Article in Clarivate Analytics Web of Science (S1)
Field of Science: Fizika / Physics (N002)
Author(s): Pranevičius, Liudvikas;Pranevičius, Liudas L;Vilkinis, Paulius;Baltaragis, Simas;Gedvilas, Karolis
Title: Water surface coverage effects on reactivity of plasma oxidized Ti films
Is part of: Applied surface science. Amsterdam : Elsevier Science B.V., 2014, vol. 295
Extent: p. 240-244
Date: 2014
Keywords: Plonos Ti dangos;Vandens garų plazma;Paviršiaus reaktyvumas;TiO2;Thin Ti films;Water vapor plasma;Surface reactivity;TiO2
Abstract: The behavior of the adsorbed water on the surface of thin sputter deposited Ti films maintained at room temperature was investigated in dependence on the thickness of the resulting adsorbed water layer, controllably injecting water vapor into plasma. The surface morphology and microstructure were used to characterize the surfaces of plasma treated titanium films. Presented experimental results showed that titanium films immersed in water vapor plasma at pressure of 10–100 Pa promoted the photocatalytic activity of overall water splitting. The surfaces of plasma oxidized titanium covered by an adsorbed hydroxyl-rich island structure water layer and activated by plasma radiation became highly chemically reactive. As water vapor pressure increased up to 300–500 Pa, the formed water multilayer diminished the water oxidation and, consequently, water splitting efficiency decreased. Analysis of the experimental results gave important insights into the role an adsorbed water layer on surface of titanium exposed to water vapor plasma on its chemical activity and plasma activated electrochemical processes, and elucidated the surface reactions that could lead to the split of water molecules
Affiliation(s): Fizikos katedra
Gamtos mokslų fakultetas
Lietuvos energetikos institutas
Vytauto Didžiojo universitetas
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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