When I start interpreting the BET data, there is BET surface area, pore volume, and pore size. But am unable to effectively explain the relationship between surface area V/S pore volume and surface area V/S monolithic layer.
By definition, porosity is a volume of pores in a solid related to its volume.
Hi Raul. The BET surface area is related to the total surface area of your material (including the surface area given by the pores). The BET surface area includes the area given by the outer surface and inner surface (whithin the pores) of your material. Please note that a high superficial area does not mean that all of this area is acessible to your application (for example: adsorption of some king of molecule). It depends on the size of your pores.
The total pore volume is the sum of the volumes of all pores in your material. A great number of small pores can give you a high total pore volume. The same way, a small number of big pores can give you the same total pore volume. That is the reason to interpret the average pore size: by using this parameter, you can draw conclusions on the porosity of your material. Some questions to help you to draw conclusions from you data:
- What is the BET surface area?
- Is this area mainly composed of the outer or inner surface?
- What is the size of the pores?
- Is the total pore volume influenced by small pores or big pores? (the concept of small or big depend on your application)
- My material has big or small pores? What are the factors influencing its superficial area?
Hope I helped you. Best regards,
Porosity is the ratio of pore volume to its total volume.
The pore volume is the total volume of very small openings in a bed of adsorbent particles
- Badges
- Science method