The pore size of the nanoporous mineral material is <100 nm, which is further divided into three subcategories: nanomicroporous mineral materials (pore size < 2 nm), nanomesoporous mineral materials (pore size 2–50 nm), and nanomacroporous mineral materials (pore size 50–100 nm). Their pores primarily originate from the structural channels of mineral crystals, and the characteristics of their pore structures can be observed using electron microscopes (SEM, TEM, etc.).