Thermoporometry might be fine. For this you need DSC with cooling system.

Please see the following paper and ref. 29 for Eq. 3.

Article Molecularly imprinted polydopamine nano-layer on the pore su...

Ali Nematollahzadeh thanks.

Dear Honey,

Depending on the pore size of your material you might look into mercury intrusion. This iwll allow you to analyze pores within the range 3.6 nm - 1.1 mm. More complex methods such as SAXS and NMR experiments can also be used.

Best,

Markus

Thanks Markus Kalmutzki for advising. Can you please suggest how NMR (solid state or solution based) can be helpful in pore size study?

T2 can be correlated to the pore size, hence, a T2 distribution can be correlated to the PSD. this method is still kind of new but many groups are working on it.

basics can be found here:

https://nmr.oxinst.com/application-detail/pore-size-distribution

best,

Markus