中文摘要：

用氨吸附漫反射红外光谱学方法,借助图谱拟合解谱手段,探测了不同预处理温度下蒙脱石表面酸性变化特征,并分析了其变化原因。结果表明,低温热处理后的蒙脱石,其B酸和L酸量增大;经较高温度（400、600℃）煅烧的样品,层间距急剧减小,氨分子难以进入层间与酸位发生反应,可探测到的两种酸量都将减少。

英文摘要：

The surface acidity of montmorillonite pretreated at different temperatures was studied by using ammoniaadsorption Diffuse Reflectance Infrared Fourier Transform spectroscopy（DRIFT）.Curve fitting on the obtained spectra was conducted and the differences of spectra of various montmorillonite samples were specifically analyzed.The results show that the Bronsted and Lewis acid capacity increases in the montmorillonite pretreated at low-temperature,compared with non-pretreated montmorillonite.However,for the montmorillonite calcined at higher temperatures（400 and 600 ℃）,acid capacities of both the B and L decrease.This is due to that calcination results in the decrease of the height of interlayer and the ammonia molecules are therefore hard to get into the interlayer region and react with the acid sites.