Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid
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2015
Authors
Stojadinović, Stevan
Tadić, Nenad
Radić, Nenad

Stefanov, Plamen

Grbić, Boško

Vasilić, Rastko

Article (Published version)

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This article reports on properties of oxide films obtained by anodization of niobium in phosphoric acid before and after the dielectric breakdown. Weak anodic luminescence of barrier oxide films formed during the anodization of niobium is correlated to the existence of morphological defects in the oxide layer. Small sized sparks generated by dielectric breakdown of formed oxide film cause rapid increase of luminescence intensity. The luminescence spectrum of obtained films on niobium under spark discharging is composed of continuum radiation and spectral lines caused by electronic spark discharging transitions in oxygen and hydrogen atoms. Oxide films formed before the breakdown are amorphous, while after the breakdown oxide films are partly crystalline and mainly composed of Nb2O5 hexagonal phase. The photocatalytic activity of obtained oxide films after the breakdown was investigated by monitoring the degradation of methyl orange. Increase of the photocatalytic activity with time is ...related to an increase of oxygen vacancy defects in oxide films formed during the process. Also, higher concentration of oxygen vacancy defects in oxide films results in higher photoluminescence intensity.
Keywords:
Niobium / Anodization / Plasma electrolytic oxidation (PEO) / Luminescence / Photocatalytic activity / PhotoluminescenceSource:
Applied Surface Science, 2015, 355, 912-920Publisher:
- Elsevier
Funding / projects:
- Graphitic and Inorganic Low-dimensional Nanostructures (RS-171035)
- The development of efficient chemical-engineering processes based on the transport phenomena research and process intensification principles (RS-172022)
- Chemical and structural designing of nanomaterials for application in medicine and tissue engineering (RS-172026)
DOI: 10.1016/j.apsusc.2015.07.174
ISSN: 0169-4332
WoS: 000363815700121
Scopus: 2-s2.0-84944345832
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IHTMTY - JOUR AU - Stojadinović, Stevan AU - Tadić, Nenad AU - Radić, Nenad AU - Stefanov, Plamen AU - Grbić, Boško AU - Vasilić, Rastko PY - 2015 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/1817 AB - This article reports on properties of oxide films obtained by anodization of niobium in phosphoric acid before and after the dielectric breakdown. Weak anodic luminescence of barrier oxide films formed during the anodization of niobium is correlated to the existence of morphological defects in the oxide layer. Small sized sparks generated by dielectric breakdown of formed oxide film cause rapid increase of luminescence intensity. The luminescence spectrum of obtained films on niobium under spark discharging is composed of continuum radiation and spectral lines caused by electronic spark discharging transitions in oxygen and hydrogen atoms. Oxide films formed before the breakdown are amorphous, while after the breakdown oxide films are partly crystalline and mainly composed of Nb2O5 hexagonal phase. The photocatalytic activity of obtained oxide films after the breakdown was investigated by monitoring the degradation of methyl orange. Increase of the photocatalytic activity with time is related to an increase of oxygen vacancy defects in oxide films formed during the process. Also, higher concentration of oxygen vacancy defects in oxide films results in higher photoluminescence intensity. PB - Elsevier T2 - Applied Surface Science T1 - Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid VL - 355 SP - 912 EP - 920 DO - 10.1016/j.apsusc.2015.07.174 ER -
@article{ author = "Stojadinović, Stevan and Tadić, Nenad and Radić, Nenad and Stefanov, Plamen and Grbić, Boško and Vasilić, Rastko", year = "2015", abstract = "This article reports on properties of oxide films obtained by anodization of niobium in phosphoric acid before and after the dielectric breakdown. Weak anodic luminescence of barrier oxide films formed during the anodization of niobium is correlated to the existence of morphological defects in the oxide layer. Small sized sparks generated by dielectric breakdown of formed oxide film cause rapid increase of luminescence intensity. The luminescence spectrum of obtained films on niobium under spark discharging is composed of continuum radiation and spectral lines caused by electronic spark discharging transitions in oxygen and hydrogen atoms. Oxide films formed before the breakdown are amorphous, while after the breakdown oxide films are partly crystalline and mainly composed of Nb2O5 hexagonal phase. The photocatalytic activity of obtained oxide films after the breakdown was investigated by monitoring the degradation of methyl orange. Increase of the photocatalytic activity with time is related to an increase of oxygen vacancy defects in oxide films formed during the process. Also, higher concentration of oxygen vacancy defects in oxide films results in higher photoluminescence intensity.", publisher = "Elsevier", journal = "Applied Surface Science", title = "Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid", volume = "355", pages = "912-920", doi = "10.1016/j.apsusc.2015.07.174" }
Stojadinović, S., Tadić, N., Radić, N., Stefanov, P., Grbić, B.,& Vasilić, R.. (2015). Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid. in Applied Surface Science Elsevier., 355, 912-920. https://doi.org/10.1016/j.apsusc.2015.07.174
Stojadinović S, Tadić N, Radić N, Stefanov P, Grbić B, Vasilić R. Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid. in Applied Surface Science. 2015;355:912-920. doi:10.1016/j.apsusc.2015.07.174 .
Stojadinović, Stevan, Tadić, Nenad, Radić, Nenad, Stefanov, Plamen, Grbić, Boško, Vasilić, Rastko, "Anodic luminescence, structural, photoluminescent, and photocatalytic properties of anodic oxide films grown on niobium in phosphoric acid" in Applied Surface Science, 355 (2015):912-920, https://doi.org/10.1016/j.apsusc.2015.07.174 . .