Congo-red substituted hexagonal mesoporous silica. materials (congo-SBA15) have bean. synthesized from. letraethoxysilance (TEOS) and Congo-red modified precursor by sol-gel method. hi. the 1)resent investigated, I)poly(ethylene axide-b- propylene oxide-b-ethylene oxide) was used as the template to prepare highly ordered mesoporous materials. Well-ordered hexagonal. arrays of the mesopores were Shown, in small-angle X-ray scattering (SAXS) and transmission, electron. microscopy (TEAT) measurements The modification of congo-red precursor was proved by FT-IR spectroscopy.