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Stability of TiO 2 forms (anatase–rutile) in the Y 2 O 3 Ti(OBu) 4 Rb 2 CO 3 system prepared by sol–gel process
Author(s) -
Kallel W.,
Bouattour S.
Publication year - 2011
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1726
Subject(s) - anatase , photocatalysis , chemistry , crystallinity , sol gel , hexanoic acid , differential thermal analysis , rutile , acetic acid , nuclear chemistry , thermal stability , chemical engineering , catalysis , organic chemistry , physics , optics , diffraction , engineering , crystallography
Three different sol–gel routes were used in order to study the stability and the crystallinity of the ternary system Y 2 O 3 , Ti(OBu) 4 , Rb 2 CO 3 . Different techniques such as FTIR, 13 C NMR TGA, DTA and XRD were used to characterize xerogels and final products. Results demonstrated that using hexanoic acid during the sol step preparation influences structural changes in the precursor gel. The effect of heat treatment to eliminate the organic material from xerogels was investigated by thermal gravimetry and differential thermalanalysis. According to the ratio of acetic acid to hexanoic acid, the phase structure of TiO 2 , viz. anatase to rutile phase, could tailored. The photocatalytic activity of the prepared catalysts, under sunlight irradiation, was evaluated using 2‐naphthol as a pollutant model. Results showed a great enhancement in the photocatalytic efficiency for doped TiO 2 sample prepared in the presence of 30acet–70hex. Copyright © 2010 John Wiley & Sons, Ltd.