Functionalization of SBA-15 with TCPP for Pollutant Removal: Structural Characterization and Adsorption Performance

Abstract

In this research, first, the compound tetrakis(4-carboxyphenyl)porphyrin was synthesized and characterized using UV-Vis and FT-IR spectroscopy methods. Also, silicate mesopores SBA-15 and NH2-SBA-15 were synthesized and characterized using FT-IR spectroscopy and (scanning electron microscope)SEM image pattern methods. Then, through the immobilization of porphyrin on silicate substrates functionalized with amine groups, the compound TCPP-NH2-SBA-15 was synthesized and characterized using FT-IR spectroscopy and SEM image pattern methods. Finally, the efficiency of compounds NH2-SBA-15 and TCPP-NH2-SBA-15 in removing cadmium (II) metal from an aqueous solution was investigated. Factors such as time and concentration were examined. The results showed that porphyrin was used as an adsorbent only when it was immobilized on mesoporous silica. In addition, it was found that the more the substituents of the porphyrin ring, the more the metal removal rate decreased.