The structural and spectral characteristics of sulfated spherical mesoporous titanium dioxide (TiO 2 -S), obtained by hydrothermal sol–gel synthesis in the presence of sulfuric acid, are studied by XRD, SEM, BET, and IR spectroscopy. The acid–base and catalytic characteristics of TiO 2 -S and commercial TiO 2 in the oligomerization of glycerol are compared. The activation of glycerol on the surface of the catalysts is studied by attenuated total reflectance Fourier IR spectroscopy (ATR-FTIR). It is found the high selectivity for diglycerides in the oligomerization of glycerol is determined by the presence of strong base sites on the surface of TiO 2 -S.

中文翻译：

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硫酸化介孔氧化钛在甘油齐聚反应中的酸碱及催化性能

通过 XRD、SEM、BET 和红外光谱研究了硫酸化球状介孔二氧化钛 (TiO 2 -S) 的结构和光谱特征，该结构和光谱特征是在硫酸存在下通过水热溶胶-凝胶合成获得的。比较了 TiO 2 -S 和商业 TiO 2 在甘油低聚中的酸碱和催化特性。通过衰减全反射傅立叶红外光谱 (ATR-FTIR) 研究催化剂表面甘油的活化。发现甘油低聚反应中甘油二酯的高选择性是由 TiO 2 -S 表面上强碱位点的存在决定的。