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Korean Journal of Chemical Engineering, Vol.26, No.5, 1235-1240, 2009
Direct incorporation of vanadium into three-dimensional KIT-6: 1. Optimization of synthesis conditions
Three dimensional (3-D) cubic KIT-6 with directly incorporated vanadium was hydrothermally synthesized by using Pluronic P123 and n-butanol as the structure-directing mixture, tetraethyl orthosilicate (TEOS) as the silica source and NH4VO3 as the vanadium source. The molar composition was varied in the range of 0.017 P123/0.08-2.4 V/1.0-2.0 TEOS/1.31-1.70 BuOH/1.83-3.00 HCl/195 H2O. The orderness of mesopore structure was estimated by X-ray diffraction, N2 adsorption, and TEM analysis. The effects of the amount of HCl, TEOS and BuOH on the structure of KIT-6 were discussed. The time and temperature for the synthesis of KIT-6 were also optimized. The amount of vanadium content influenced the framework structure and crystallinity of the Ia3d phase significantly.
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