Help in material porosity

Alexandru

Hello all of you! I am new in here. I am working on a project in water purification. I need to know if there is any solid in natural state or artificially made, non toxic, with porosity near 1 nano-meters. I need to use it for final phase of purification, the reversed osmosys process. I know there are specialized diaphragms for this process but i am interested in solids. 1nm.
Thanks!

Gokul43201

Have you looked into zeolites ?

Alexandru

I think those materials are a bit prohibitive to the common person. I am looking for something , a mixture, that can be made of common materials, resulting a solid block.