One of the most attractive nanomaterials consists of porous morphologies, where the nanometric pores can be utilized in a wide range of practical applications in all areas of human activity. Both natural and synthetic nanoporous materials consist of pores of diameter less than 100 nm and are classified based on the pore size, such as microporous (≤ 2 nm), mesoporous (2–50 nm), and macroporous (> 50 nm) materials. The properties and applications of porous solids depend on their porosity and surface area. Typical examples of nanoporous solids are zeolites, activated carbon, metal–organic frameworks, ceramics, silicates, aerogels, pillared materials, various polymers, and inorganic porous hybrid materials. Directed design at the atomic and molecular levels allows their applications in energy storage and conversion, such as fuel cells, solar cells, Li–ion batteries, hydrogen storage and supercapacitors, catalysis, sorption applications, gas purification, separation technologies, drug delivery, and cell imaging. The utilization of the pores in impregnation of nanoparticles/proteins/ions or to transport the latter across the pores of membranes is also of practical and scientific interest. Potential topics include, but are not limited to:

• Organic nanoporous materials: Metal–organic framework (MOF) and covalent organic framework (COF)
• Mesoporous nonsiliceous materials
• Zeolite
• Template–based or template–free synthesis of amorphous/crystalline porous materials, including colloidal (photonic) crystals
• Structural, microscopic, and spectroscopic characterization
• Theoretical modeling of the fundamental aspects related to adsorption and host–guest interactions
• Influence of the morphology and chemical nature of the pores in diffusion, confinement, and transport of biological and organic molecules and inorganic nanoparticles
• Applications in catalysis, cell biology, environmental remediation, water desalination, purification, separation, sensors, and optical, electronic, and magnetic devices
• Sorption mechanism or host–guest chemistry of energy storage and gas separation
• Electrochemistry of porous materials
• Investigation of the properties of porous metals/semiconductors/magnetic materials as compared to the bulk or other nanostructured morphologies

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