微介孔材料物理吸附准确性分析的理论与实践

Theoretical and practical discussion of measurement accuracy for physisorption with micro- and mesoporous materials

比表面积和孔径分布是表征催化剂和材料物理性质的基本参数,随着材料研究的日益广泛和深入,研究工作者对该参数的科学性和准确性要求日益提高.但是,比表面积和孔径分布的分析方法—物理吸附法,长期以来被看作一种测量方法,其准确性并不为人们所关注,在实际工作中对其的理解存在着大量的误区.本文从仪器硬件设计、实验操作及数据处理三方面对物理吸附法所涉及的准确度进行了探讨.

The surface area and pore size distribution are two very basic properties of a solid catalyst powder.Physisorption is still the only macroscopic method for measuring these two properties.To better understand the pore structure and surface properties of materials,it is very important to make accurate physisorption measurements.Unfortunately there are still many misunderstandings about physisorption.In fact,hardware design,operation of the instrument and data reduction can all contribute to the accuracy of a measurement.In this paper,the measurement accuracy of physisorption was discussed from these three aspects.