The morphologies of nanoparticles (NPs) include nanospheres, nanosheets, nanoclusters, nanograins, and nanofibers. Substances in the shape of spherical dots, rods, thin plates, or any irregular shape with a cross section of less than 100 nm are defined as nanoparticles. Nano catalysts stand at the crossroads of homogeneous and heterogeneous catalysts and they benefit from both in terms of activity, selectivity, efficiency, and reusability in many circumstances. They use nano-effects to go beyond the boundaries of homogeneous and heterogeneous catalysts. Nano-effects include structural alterations and confinement, which have a significant impact on energy levels and can modify nanomaterials' physical, electrical, and optical properties. Advanced nanoparticle characterization is necessary for more rational nanoparticle design and production.