A dsorption studies of malachite green dye on mesoporous silica synthesized in 1-octyl-3-methylimidazolium chloride ionic liquid

Abstract

In this work, one long-chain ionic liquid (IL), 1-octyl-3-methylimidazolium chloride, was used as a template for the preparation of mesoporous silica via a modified sol-gel route. The morphology of the obtained material was characterized by scanning electron microscopy (SEM). The various vibrational modes of different functional groups in the mesoporous silica materials were revealed by Fourier transform infrared (FTIR) spectroscopy. N2 adsorption-desorption isotherms measurement was used to characterize the pore diameter and BET surface area. The adsorption capacity of malachite green dye from aqueous solution has been performed using the mesoporous silica synthesized in ionic liquid. The adsorption equilibrium of dye on mesoporous silica was found to be at 150 min. The maximum malachite green dye adsorption was found to be 97 %.