Abstract:
Monomeric- and bimetallic-incorporated SBA-15 (Fe-SBA-15, Ti-SBA-15 and 0.01Fe-0.01Ti-SBA-15) were successfully synthesized via sol gel process at room temperature in highly acidic condition using silatrane, ferric chloride and titanium isopropoxide as a silica, iron, and titanium sources, respectively, Pluronic 123 as template. It was found that from SAXS patterns and Fe-SEM images all samples maintained their 2D hexagonal mesoporous structure. The result from N2 adsorption-desorption measurement showed type (IV) isotherm with HI hysteresis loop and uniform pores as well as high surface area (631-763 m2/g), pore volume (0.621-0.971 cc/g), and large pore size (3.93-5.21 nm). DR-UV spectra confirmed the metal incorporation with no extra framework. Its catalytic activity was studied for phenol hydroxylation using H2O2 as oxidizing agent and showed that the highest phenol conversion at 37.96% with 100% selectivity of benzoquinone was obtained when using 1:1 molar ratio of phenol/H2O2 and 30 mg of 0.01Fe-0.01Ti-SBA-l5 at 30 ℃ for 20 min.
