Introduction

The Brunauer-Emmett-Teller (BET) method is widely used in materials science, particularly in the fields of catalysis, adsorption, and surface chemistry. It can be used to characterize a wide range of porous materials, including activated carbon, zeolites, metal-organic frameworks, and silica gels.

One of the advantages of the BET method is that it is non-destructive and can be used to analyze small amounts of material. It is also a relatively fast and simple technique that can provide valuable information on the surface area and pore structure of a material. However, it is important to note that the BET method is limited to materials with relatively small pore sizes, typically in the range of 2-50 nanometers. For materials with larger pores, other techniques such as mercury intrusion porosimetry may be more appropriate.

Representive Results

1. Measurement of BET.

2. Analysis of mesoporous materials.

3. Analysis of macroporous materials.

Sample Requirement

1. The sample must be powdered or porous, with a smooth and uniform surface, without obvious wear or cracking, and not adherent or contaminated.

2. The sample should be dry. Any moisture, solvents, or other volatiles on the surface or in the pores must be removed prior to testing. High temperature and/or low pressure treatment of the specimen is usually required.

3. The size of the sample should be large enough to ensure the representativeness of the measurement results. At the same time, it should not consume too much reagent from the analyzer.

4. The sample should meet safety requirements, especially if the sample is to be tested under high temperature, high pressure, corrosive, or toxic conditions.