采用溶胶-凝胶法以钛酸四丁酯为原料,经水解缩聚再缩聚,并用浸渍法添加稀土Ce和La,一定温度焙烧后制得稀土掺杂纳米二氧化钛固体超强酸.红外光谱表明,该固体超强酸中SO2-4以桥式双配位与金属氧化物结合,XRD证明固体超强酸为锐钛矿型,SEM图像证明超强酸颗粒为球形.将该超强酸用于硬脂酸与正丁醇的酯化反应,显示出很高的催化活性.经0.12 mol/L Ce4+的硫酸(1.0 mol/L)溶液、0.07 mol/L La3+的硫酸( 1.25 mol/L)溶液浸渍10～14 h后,500～550℃温度下焙烧3h的超强酸,催化硬脂肪酸正丁酯反应的酯化率分别达到97.8％和96.7％.
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