Trends and Advantages in Using Nanomaterials for Air Filtration

In recent years, substantial progress has been achieved in the preparation and characterization of nanostructured materials, which have become available for a wide range of applications with filtering properties. In such materials it has been observed that, with decreasing crystallite sizes, grain boundaries contribute significantly to the material's microscopic properties. Numerous fundamental physical properties change dramatically when the dimensions of materials become in the nanometer range. Nanostructure properties are highly influenced by the interface between different particles, layers, or crystals or amorphous domains. An increasing number of studies are being done on metal oxide nanoparticles such as MgO, ZnO, CaO, CuO, Ag2O, TiO2, Ag, and carbon nanotubes for their potential application as antimicrobials in food, environment, and health settings. The paper aims to summarize the importance of using nanomaterials to increase the efficiency of filtration media.