Synthesis and characterization of a new phase of non Na-loaded analcime zeolite by microemulsion technique

摘要

The analcime structure zeolite was synthesized in cationic microemulsion at room temperature. An aluminum sulfate hexadecahydrate (Al-2(SO4)(3)center dot 16H(2)O) and tetraethylorthosilicate (TEOS) with Si/Al ratio of 10/1 were used as aluminium and silicon sources. Microemulsion was formed with the use of a straight-chained surfactant (cetyltrimethylammonium bromide; CTAB) with mixed solvents (butanol, heptane, and water). The purifying technique with ethanol and acetone was successfully employed to eliminate carbonaceous residues below 250 degrees C. The as-synthesized product was calcined at 550 degrees C for 5 h. H-1 NMR data supported the alignment of chemical reagents. FT-IR spectra demonstrated similar vibrational range of analcime, while results from XRD pattern also strongly supported the analcime solid structure. The as-synthesized zeolite has Langmuir's surface area of 11.29m(2)/g, the total pore volume of 0.0172 cc/g, and the average pore diameter of 67 nm.