摘要
本文研究了几种氟化吸附剂(包括硅胶、硅铝凝胶和活性氧化铝)的物理结构和表面性质,获得如下主要结论:(1)红外光谱确证在氟化硅胶的表面上形成了Si-F基L931cm^(-1);(2)与未氟化样品比较,所有氟化吸附剂的比表面均降低,而平均孔半径、酸度和酸强度增加;(3)除氟化氧化铝外,所有氟化吸附剂的水蒸气吸附量很低,且有很强的憎水性。
In this paper, the physical structure and surface properties of fluorinate adsorbents (including silica gel, silica-alumina gel and activated alumina) have been studied. The main conclusions are obtained as follows: (1) The IR spectra show that the Si-F groups (931 cm-1 ) are formed on the surface of fluorinated silica gel. (2) For all fluorinated adsorbents, the specific surface area decreases, while the pore radius, acidity and acid strength increase, in comparison with the original samples. (3) All of the fluorinated adsorbents exhibit very low water vapor adsorption and strong hydrpphobic properties except for the fluorinated alumina.
