Authors: Sonia LázaroNavas Sanjiv Prashar Mariano Fajardo Santiago GómezRuiz
Publish Date: 2015/02/13
Volume: 17, Issue: 2, Pages: 94-
Abstract
The synthesis of mesoporous aggregates of titanium oxide nanoparticles F0 is described using a very cheap and simple synthetic protocol This consists of the reaction of titanium tetraisopropoxide and a solution of HNO3 in water pH 20 and subsequent filtration In addition fluorinedoped titanium oxides F1 F2 F5 and F10 were synthesized using the same method adding increasing amounts of NaF to the reaction mixture avoiding the use of expensive reagents such as NH4F or trifluoroacetic acid The resulting materials were calcined at different temperatures 500 600 and 650 °C giving particles sized between 10 and 20 nm Furthermore a hybrid Fdoped TiO2 with supported palladium nanoparticles of ca 20 nm F5500Pd1 was synthesized by grafting an organometallic palladiumII salt namely PdcodCl2 cod = 15cyclooctadiene Photocatalytic studies of the degradation of methylene blue MB were carried out under UV light using all the synthesized material nondoped an Fdoped TiO2 observing that the increase in the quantity of fluorine has a positive effect on the photocatalytic activity F5500 is apparently the material which has the most convenient structural properties in terms of surface area and anatase/rutile ratio and thus a higher photocatalytic activity The hybrid material Fdoped TiO2–Pd nanoparticles F5500Pd1 has a lower band gap value than F5500 and thus photocatalytic degradation of MB under LED visible light was achieved using F5500Pd1 as photocatalyst
Keywords: