Vol 9, No 3 (2019)

The reduction of metallic cation leads to nanoparticles as one of the most common reduced from of metals. It has been revealed great output variability of obtained nanoparticles related to the nature of the reducing agents. The classification of the agents used demonstrates that nanoparticles can be synthesized with very save methods. In this review paper, we try to explain the reducing processes depending on the agent used in the electronic transfer from the reducing agent to metallic cation. The structure was directly related to the electronic configuration of the element and the power of the adjacent molecule used as reducing agent. The intrinsic nature of the reducing agent play a crucial role to make the primary seeds of nanoparticles and burn out the charge hold by the cation.