Preparation, characterization and application of mesoporous silica nanoparticles as support for heterogeneous solid acid catalyst

The condensation reaction of 1,2-diketones and o-phenylenedimines was investigated in the presence of nano-sized mesoporous silica (MCM-41) supported 12-tungstophosphoric acid (HPW) as solid acid catalyst. Nano-sized MCM-41 was synthesized and the catalysts with different loading amounts of HPW (5-30 wt.%) were prepared and characterized by XRD, FT-IR and SEM. The results confirms good dispersion of HPW on the solid support. The catalyst is reusable many times without loss in its activity.

کلیدواژه ها:

Mesoporous silica ، nanoparticles ، catalyst ، solid acid ، quinoxalines