BET

Non-microscopic Characterization
Category General
Difficulty Level Normal
Audience Level General
Description Optical microscopy, Scanning probe microscopy and Electron microscopy are known as microscopic techniques. Other methods such as Spectrophotometry, Chromatography, BET and etc. are classified as non-microscopic characterization. Non-microscopic characterization is incorporated in this course.
Overview
The term “non-microscopic” is used when Optical microscopy, Scanning probe microscopy and Electron microscopy are not used to determine materials’ quantity and quality. Pieces of information such as what element and how much of it are in a component, specific surface area and etc. are determined using non-microscopic methods.


Booklet
Description
 It starts with a brief introduction, goes through the definition of surface area, and some other concepts. Then it talks about measurement methods such as SEM and TEM. Finally it talks about the related theories, BET plots and their types, and ends with the limits of BET method.
Mental Challenge
 Why do we call this method “BET” and what is it?
Quizzes and Activities
 Activity: If two porous bodies with the same amount and shape have different sizes of pores, which one has the higher specific surface area. 
Further Reading Sources
 1.https://www.sciencedirect.com/topics/chemistry/bet-method