In order to improve the catalytic process, nanomaterial-based catalysts are usually heterogeneous catalysts that have been split up into metal nanoparticles. The increased surface area of metal nanoparticles can boost catalytic activity. Catalysts made of nanoparticles can be easily separated and recycled. They're usually employed in mild conditions to keep nanoparticles from degrading. Catalysis is an essential field of application in the era of nanoscience, where all equipment and technologies are shrinking in size while improving their qualities. Nanocatalysts are used in a variety of applications, including water purification, fuel cells, energy storage, composite solid rocket propellants, biodiesel production, medicine, and dye. Carbon nanotubes are widely employed in many applications.