【摘要】 采用硼酸三甲酯作为探针分子对Al2O3的路易斯碱性进行了红外光谱定量研究.Al2O3对硼酸三甲酯的吸附使硼酸三甲酯在1360cm-1的谱峰分裂成1409cm-1和1287cm-1两个峰,1036cm-1的谱峰紫移到1067cm-1.低压下吸收峰高与硼酸三甲酯压力成正比,与Al2O3含量成正比.结果表明Al2O3有一定的路易斯碱强度,与硼酸三甲酯之间的吸附是单分子层化学吸附.更多还原

【Abstract】 <Abstrcat> The Lewis base property of Al₂O₃ has been studied quantitatively with an infrared spectroscopic approach by using boric acid trimethyl ester （BATE） as the probe molecule. The adsorption of BATE by Al₂O₃ makes the 1360cm-1 absorb peak of BATE didived into two absorb peaks （1409cm-1 and 1287cm-1） and the 1036cm-1 absorb peak shifted to 1067cm-1. Under low pressure the height of the absorb peaks is direct proportion to the pressure of BATE and to the Al₂O₃ content. The results showed that there is certain strength of Lewis base with Al₂O₃ and the adsorption of BATE by Al₂O₃ is monomolecular chemical adsorption.更多还原