SO_4^(2-)/ZrO_2-TiO_2-SnO_2超强酸催化剂的红外光谱特征

THE IR CHARACTERIS TIC OF THE SUPERACID CATALYST SO_4^(2-)/ZrO_2-TiO_2-SnO_2

运用富立叶红外学谱(FT-IR)法对超强酸催化剂SO_4^(2-)/ZrO_2-TiO_2—SnO_2的研究结果表明,该固体超强酸有1220、1137和1050cm^(-1)三个特征吸收,当出现990cm^(-1)吸收峰时则没有超强酸性;SO_4^(2-)以螯合状双配位的方式吸附在金属离子上,没有形成硫酸盐。

The experimental results of FT-IR indicated that the solid superacid catalyst SO_4^(2-)/ZrO_2-TiO_2-SnO_2 had three characteristic absorption bands, i. e. 1220, 1137 and 1050 cm^(-1), it was not superacid when the absorption band 990 cm^(-1)appeared, and SO_4^(2-) was combined with metal ions of the superacid catalyst in a bidenate state instead of sulfate.