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粉末或多孔性固体的比表面(指1克固体物貭的总表面积)在很多工业和科学研究中起着重要的作用,故此如何測定比表面一直是表面化学中的重要課題。各种方法中以吸附法应用最广。1938年,勃魯納尔(Brunauer),爱曼特(Emmett)和泰勒(Teller)将朗格繆尔(Langmuir)的单分子层吸附理論加以推广,提出了多分子层的吸附理論。此理論不仅包括了单分子和多分子的吸附,而且提供了现时得到最多学者承认的固体比表面的測定法。現时采用最广的是氮气的
The specific surface area of a powder or porous solid, which represents one gram of the total surface area of a solid object, plays an important role in many industrial and scientific studies. Therefore, how to determine specific surface area has always been an important issue in surface chemistry. Adsorption in a variety of ways the most widely used. In 1938, Brunauer, Emmett, and Teller extended Langmuir’s theory of monolayer adsorption to propose a multi-molecular layer adsorption theory. This theory includes not only single molecule and multi-molecule adsorption, but also provides the most current scholars have recognized the solid specific surface area of the assay. At present, the most widely used is nitrogen