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15240672380's Question
Chemistry
Posted 10 months ago

Why do i get porosity and hysteresis in both direct carbonization and salt melt template?
i thought direct carbonization should not give porosity more than the salt template . what is the difference and how do i explain the effct of the saltm used in the seond metho
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Answer from Sia
Posted 10 months ago
Solution
1
Understand the processes: Direct carbonization and salt melt template are two different methods used to create porous carbon structures
2
Porosity in direct carbonization: In direct carbonization, porosity is created by the decomposition of organic precursors, which may leave voids as gases escape
3
Porosity in salt melt template: The salt melt template method involves incorporating a salt that is later removed, leaving behind a porous structure. The presence of salt can create a more controlled and uniform pore structure
4
Explain the effect of salt: The salt used in the second method acts as a template, which upon removal, increases the porosity and can also affect the hysteresis behavior of the carbon material
5
Hysteresis observation: Hysteresis in the context of porosity refers to the difference in the adsorption and desorption isotherms of gases or liquids in porous materials, which can be influenced by the pore structure and connectivity
Answer
Both direct carbonization and salt melt template methods can result in porosity and hysteresis. The salt in the second method serves as a template that, upon removal, can create a more defined and uniform porous structure, which can influence the extent of hysteresis observed.
Key Concept
Porosity and hysteresis in carbon materials
Explanation
Porosity can be introduced by both direct carbonization and salt melt template methods, but the salt template can lead to a more uniform and controlled pore structure, which affects the material's hysteresis behavior.

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