Abstract
Nanostructured materials such as MCM-41 modified with rare earth ions have been studied due to their potential for a variety of applications. Rare earth trivalent ions in some solid compounds emit light at characteristic wavelengths due to infra 4f or inter 4f–5d transitions. The MCM-41 and AlMCM-41 mesoporous materials were synthesized by hydrothermal treatment using cethyltrimethylammonium as template, and then calcined at 500 °C in presence of air. The obtained materials were impregnated with Eu(III) ions using europium nitrate solution in ethanol with equivalent concentrations of 5, 10, and 15% in mass, followed by calcination at 500 °C under nitrogen atmosphere. The Eu-containing products were characterized by thermogravimetric analysis (TGA), X-ray diffraction, and photoluminescence spectroscopy. The emission spectra were recorded at room temperature. For the Eu–MCM-41 and EuAl–MCM-41 samples, intense photoluminescence were observed in the visible region, with maximum intensity centered at 620 nm.
Published Version
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