Photocatalytic reaction of arylamines/alcohols on TiO
Received: 23 December 2009 / Accepted: 23 April 2010 / Published online: 17 June 2010
Ó Springer Science+Business Media B.V. 2010
Abstract In this article, the photocatalytic reaction of aniline and 4-amino
N,N-dimethyl aniline with methanol, ethanol and isopropanol on anatase TiO
particles under UV (365-nm wavelength) irradiation was examined. The concen-
tration of unreacted arylamines and products was measured by gas chromatography
picks integration, and then the products were identiﬁed by mass spectroscopy
analysis. By making a comparison within the rates of photocatalysis of each
arylamine in different alcohols under various irradiation times, it was revealed that, in
all cases, the sequence of photocatalysis rate was methanol [ ethanol [ isopropanol.
In reactions where the concentrations of arylamine were lower than 10 mmol/l,
imines were the main products and the alkylation of amines was not observed. In the
higher concentration of arylamines, oxidation and dimerization was occurred.
Keywords Photocatalytic reaction Á Arylamine Á TiO
Heterogeneous photocatalysis has been extensively investigated as a possible method
for pollutant removal [1–3], organic synthesis [4–6] and bactericidal activity .
Nano-sized titania powder is widely used a semiconductor photocatalyst, owing to its
non-toxic nature, chemical stability, availability, low cost and capability of easy
preparation in the nano-particulate form with high surface area .
The initial step in TiO
-mediated photocatalytic degradation is proposed to involve
the generation of an (e
) pair, leading mainly to the formation of hydroxyl radicals
A. Hosseinnia (&) Á M. Pazouki Á K. Karimian
Environment and Energy Group, Materials and Energy Research Center, Meshkin-Dasht Road,
P.O. Box 31787/316, Karaj, Iran
Res Chem Intermed (2010) 36:373–381