采用溶胶-凝胶法制备SO42-/TiO2固体超强酸,以异辛酸与季戊四醇的酯化反应为探针反应,考察浸渍液种类及浓度、焙烧温度对固体超强酸催化性能的影响。用流动指示剂法测定催化剂的酸强度,并采用原位吡啶吸附的IR谱图对催化剂进行表征。结果表明,在H2SO4浸渍液浓度为1.0 mol.L-1、500℃下焙烧3 h制备的SO42-/TiO2催化剂活性最好,酯化率可达到85.0%。 The solid superacid SO42- / TiO2 was prepared by sol-gel method. The esterification reaction of isooctanoic acid with pentaerythritol was used as the probe reaction. The influences of the type and concentration of impregnating solution and the calcination temperature on the catalytic performance of solid superacid were investigated. The acidity of the catalyst was measured by flow indicator method and the catalyst was characterized by IR spectrum of in situ pyridine adsorption. The results showed that the SO42- / TiO2 catalyst prepared with H2SO4 impregnation solution at a concentration of 1.0 mol.L-1 and 500 ° C for 3 h had the best catalytic activity with an esterification rate of 85.0%.