Synthesis of functionalized SBA-15 as a nano sorbent for the removal of halophenols from aqueous media

Present work deals with the adsorption of phenol and p-bromophenol from aqueous solutions on new nanoporous sorbent; amino-modified ordered mesoporous silica (NH2-SBA-15) material. SBA-15material was synthesized by using pluronics P123 as surfactant. Furthermore; 3-aminopropyl trimethoxy (APS) was incorporated on SBA-15 surface via post synthesis (grafting) method It was found that NH2-SBA-15 shows significant adsorption for phenol and p-bromophenol. This may be because of the acid and alkaline interaction between the amino functional group and phenol and p-bromophenol. The structural order and textural properties of the mesoporous materials were studied by XRD, SEM, FT-IR and nitrogen adsorption. The presence of functional groups was confirmed by FT-IR analyses. Batch adsorption studies were carried out to study the effect of various parameters like contact time effect of pH and initial concentration. Freundlich and Langmuir adsorption isotherms were used to model the equilibrium adsorption data for phenol and p-bromophenol.

کلیدواژه ها:

grafting ، nanoporous ، surfactant ، amino-modified ، Freundlich and Langmuir adsorption isotherms