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Novel nitrogen precursors for electrochemically driven doping of titania nanotubes exhibiting enhanced photoactivity
Abstrakt
Nitrogen doped titania nanotubes were successfully sensitized by electrochemical method, i.e. as-anodized titania was immersed in different amine (diethyleneamine-DETA, triethyleneamine-TEA, ethylenediamine-EDA) and urea (U) solution and a constant potential was applied. The highly ordered morphology of fabricated N-TiO2 was investigated by using scanning electron microscopy. Spectroscopic techniques, i.e. UV-Vis spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and photoluminescence spectroscopy were utilized to characterize absorbance capability and the crystalline phase, to confirm the presence of nitrogen atoms and to study charge recombination, respectively. The highest photocurrent under both UV-Vis and visible illumination (λ > 420 nm) was registered for N-TiO2 sample obtained from diethylenetriamine solution, used as a nitrogen precursor. The photocurrent density exhibited during UV-Vis irradiation by the most active nitrogen doped titania was 2.83 times higher compared to pure TiO2 nanotubes. The photocatalytic activity studies, demonstrated a significant improvement when N-TiO2-DETA (52 %) and N-TiO2-U samples (49 %) where used instead of undoped TiO2 (27 %). The presented results show that electrochemical doping with 0.5 M amine or urea solutions is a simple, cheap and effective strategy to introduce nitrogen atoms into the titania structure without affecting its morphology.
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuł w czasopiśmie wyróżnionym w JCR
- Opublikowano w:
-
NEW JOURNAL OF CHEMISTRY
nr 39,
wydanie 4,
strony 2741 - 2751,
ISSN: 1144-0546 - Język:
- angielski
- Rok wydania:
- 2015
- Opis bibliograficzny:
- Siuzdak K., Szkoda M., Sawczak M., Lisowska-Oleksiak A.: Novel nitrogen precursors for electrochemically driven doping of titania nanotubes exhibiting enhanced photoactivity // NEW JOURNAL OF CHEMISTRY. -Vol. 39, iss. 4 (2015), s.2741-2751
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1039/c5nj00127g
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 191 razy
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