Materials Chemistry and Physics, Vol.146, No.3, 374-379, 2014
Synthesis of Fe-Ti-MCM-48 from silatrane precursor via sol-gel process and its hydrothermal stability
A series of bimetallic Fe-Ti-MCM-48 materials was successfully synthesized via sol gel method using cetyltrimethylammonium bromide (CTAB) as a template and silatrane, iron (III) chloride, and titanium (IV) isopropoxide as silica, iron, and titanium sources, respectively. Scanning electron microscopy (SEM) showed the truncated octahedron morphology of Fe-Ti-MCM-48 center dot X-ray diffraction (XRD) patterns showed well-defined, order cubic mesoporous structures. X-ray fluorescence (XRF) revealed the total metal content of the final product. UV-visible absorption spectra confirmed both iron (Fe3+) and cerium (Ti4+) species highly dispersed in the framework, while N-2 adsorption/desorption measurements indicated a high specific surface area. As metal content increased, the mesoporous order and surface area decreased. The synthesized Fe-Ti-MCM-48 with 0.01Fe/Si and 0.01Ti/Si ratio still retained a cubic structure after hydrothermal treatment at 100 degrees C for 72 h. (C) 2014 Elsevier B.V. All rights reserved.