Preparation and Modification of Magnetic LSX Type Molecular Sieve by Directing Agent Method

This is an article in the field of materials science. Magnetic LSX molecular sieves were prepared by colloidal directing agent and Fe₃O₄. After silver ion exchange and hydrazine hydrate reduction, magnetic LSX molecular sieves containing silver atoms were prepared, the surface morphology, magnetic properties, phase structure, elemental composition and specific surface area of the samples were characterized by scanning electron microscopy, vibrating sample magnetometer, X-ray diffraction analyzer, photoelectron spectroscopy and specific surface adsorption instrument. The results showed that magnetic LSX molecular sieve is the composite material of LSX molecular sieve and Fe₃O₄. The micropore specific surface area was 679.38 m²/g. The optimum dosage of colloidal guide agent was 0.5%. The magnetic properties increased with the increase of Fe₃O₄ content. The specific surface area of magnetic LSX molecular sieve reduced after silver exchange with hydrazine hydrate.