Abstract Background Nanomaterials have emerged as a fascinating class of materials in high demand for a variety of practical applications. They are classified based on their composition, dimensions, or morphology. For the synthesis of nanomaterials, two approaches are used: top-down approaches and bottom-up approaches.Main body of the abstract Nanoscale materials and structures have the potential to be used in the production of newly developed devices with high efficiency, low cost, and low energy demand in a variety of applications. There are several contributions in renewable energy conversion and storage in the energy sector, such as solar photovoltaic systems, fuel cells, solar thermal systems, lithium-ion batteries, and lighting. Furthermore, nanofluid-based solar collectors are a new generation of solar collectors based on the use of nanotechnology. It has the potential to increase collector efficiency by up to 30.Short conclusion Graphene and graphene derivatives are known as more efficient energy-saving materials, with the ability to maximize heat transfer efficiency and save up to 30 of energy in water desalination. Silver nanoparticles (Ag NPs) are a powerful antibacterial material that can kill a wide variety of microorganisms. They are commonly used in water treatment and are incorporated into polyethersulfone (PES) microfiltration membranes. The use of an Ag-PES membrane improved the antibiofouling performance of PES membranes. From the industrial application of nanotechnology, applications of TiO2-based nanocoatings that can be used as dust-repellent coatings for solar panels improve their efficiency and reduce the amount of required maintenance. Furthermore, the nanoscale dimension of these particles facilitates their movement in various body parts, resulting in serious diseases such as cancer and organ damage. As a result, it is suggested to focus in our incoming research on the disposal of nanomaterial waste and their safe application.
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