Abstract

MELENDEZ-ORTIZ, Héctor Iván et al. Hydrothermal Synthesis of Mesoporous Silica MCM-41 Using Commercial Sodium Silicate. J. Mex. Chem. Soc [online]. 2013, vol.57, n.2, pp.73-79. ISSN 1870-249X.

In this work, ordered mesoporous silica MCM-41 was prepared by hydrothermal synthesis using industrial-grade sodium silicate (Na₂SiO₃) as silica source, hexadecyltrimethyl-ammonium bromide (CTAB) as template agent and ethyl acetate as pH regulator. The influence of CTAB/SiO₂ molar ratio, reaction time, aging temperature, and co-surfactant type on the structural and morphological properties of the obtained silica was studied. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption isotherms. Ordered mesoporous MCM-41 silica was obtained at 80 °C by using a range of CTAB/SiO₂ molar ratio from 0.35 to 0.71 and reaction times up to 72 h and isopropanol (i-PrOH) as co-surfactant.

Keywords : Mesoporous silica; MCM-41; sodium silicate; hydrothermal synthesis; X-rays.

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