Abstract
Summary The incorporation of transition-metal ions in Beta-zeolite was carded out by direct hydrothermal synthesis. The synthesized zeolites (H-, Ti- and V-Beta) were characterized by powder X-ray diffraction (XRD), scanning electron microscopy with x-ray energy dispersive analyzer (SEM/EDS), infrared (IR), UV-visible and electron paramagnetic resonance (EPR) spectroscopies. Both XRD and IR spectroscopic studies confirmed that the synthesized Ti-Beta carded out isomorphous substitution of Si by Ti in the Beta-zeolite framework. In case of V-Beta, the EPR studies evidenced the formation of VO2+ species that seem to be located at the cation sites of the zeolites.
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