Synthesis and structural characterization of ordered supermicroporous MSU type silica–tin molecular sieves

Abstract

Supermicroporous Sn–Si molecular sieves, with different amounts of tin, have been prepared using polyethylene oxide type surfactants as structure directing agents and a silicon alkoxide as precursor. Syntheses have been carried out in acidic media. The structural and chemical properties of the prepared materials, have been studied using a variety of techniques such as Wide Angle X-Ray Scattering (WAXS), physisorption of N2 at 77K, FT-IR spectroscopy of chemisorbed pyridine, skeletal FT-IR, Temperature Programmed Desorption of ammonia (NH3-TPD) and 119Sn Mossbauer spectroscopy.