Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/60125

TitleTantalum oxynitride thin films: Assessment of the photocatalytic efficiency and antimicrobial capacity
Author(s)Cristea, Daniel
Cunha, Luís
Gabor, Camelia
Ghiuta, Ioana
Croitoru, Catalin
Marin, Alexandru
Velicu, Laura
Besleaga, Alexandra
Vasile, Bogdan
Keywordstantalum oxynitride
magnetron sputtering
surface roughness
photocatalytic activity
antibiofilm capacity
Issue date23-Mar-2019
PublisherMultidisciplinary Digital Publishing Institute
JournalNanomaterials
Abstract(s)Tantalum oxynitride thin films have been deposited by reactive magnetron sputtering, using a fixed proportion reactive gas mixture (85% N<sub>2</sub> + 15% O<sub>2</sub>). To produce the films, the partial pressure of the mixture in the working atmosphere was varied. The characteristics of the produced films were analyzed from three main perspectives and correspondent correlations: the study of the bonding states in the films, the efficiency of photo-degradation, and the antibacterial/antibiofilm capacity of the coatings against <i>Salmonella</i>. X-ray Photoelectron Spectroscopy results suggest that nitride and oxynitride features agree with a constant behavior relative to the tantalum chemistry. The coatings deposited with a higher reactive gas mixture partial pressure exhibit a significantly better antibiofilm capacity. Favorable antibacterial resistance was correlated with the presence of dominant oxynitride contributions. The photocatalytic ability of the deposited films was assessed by measuring the level of degradation of an aqueous solution containing methyl orange, with or without the addition of H<sub>2</sub>O<sub>2</sub>, under UV or VIS irradiation. Degradation efficiencies as high as 82% have been obtained, suggesting that tantalum oxynitride films, obtained in certain configurations, are promising materials for the photodegradation of organic pollutants (dyes).
TypeArticle
URIhttp://hdl.handle.net/1822/60125
DOI10.3390/nano9030476
ISSN2079-4991
Peer-Reviewedyes
AccessOpen access
Appears in Collections:BUM - MDPI

Files in This Item:
File Description SizeFormat 
nanomaterials-09-00476.pdf6,51 MBAdobe PDFView/Open

Partilhe no FacebookPartilhe no TwitterPartilhe no DeliciousPartilhe no LinkedInPartilhe no DiggAdicionar ao Google BookmarksPartilhe no MySpacePartilhe no Orkut
Exporte no formato BibTex mendeley Exporte no formato Endnote Adicione ao seu ORCID