Influence of the chemical synthesis on the physicochemical properties of N-TiO2 nanoparticles
Articolo
Data di Pubblicazione:
2013
Abstract:
Nitrogen doped TiO2 materials were successfully prepared following three different preparation routes
(sol–gel, hydrothermal and pyrolysis) and characterized by various spectroscopic techniques. All samples
absorbed radiation in the visible range and were active in the photocatalytic degradation of cyanotoxin
microcystin-LR under visible light and in acidic conditions. The different preparation routes led to the
formation of various impurities into the solids. In the case of hydrothermal and sol–gel samples, these
impurities were weakly bound at the surface whereas the materials prepared by pyrolysis, the impurities
showed a relevant stability and could not be removed even at high temperature. These species can affect
the photocatalytic performance in different ways depending on their bulk or surface nature. On the basis
of the photocatalytic data illustrated in this paper, the presence of such species at the surface was not
detrimental for the photocatalytic activity of nitrogen doped TiO2 but actually contributed to a higher
interaction with the target cyanotoxin; leading to a higher photocatalytic activity than that observed for
samples prepared via the classic sol–gel method.
Tipologia CRIS:
03A-Articolo su Rivista
Elenco autori:
Livraghi S.; Pelaez M.; Biedrzycki J.; Corazzari I.; Giamello E.; Dionysiou D.D.
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