... Catalysis Communications. ... To prepare TiO 2 /SBA-15 catalysts, SBA-15 was impregnated in ethanol solution of TBOT at room temperature for 24 h, and then dried in an oven at ... Condition: BPA 11.4 g, DMC 18 g, catalyst 5 g, temperature 170–180 °C, 10 h, BPA/DMC = 1:4 (mol). ...