Nickel Hydroxide Nanoparticles
Nickel hydroxide nanoparticles are widely used in different applications. Nickel (II) Hydroxide is a crystalline inorganic solid in which nickel metal has an oxidation number of 2+. The longest-standing use of Nickel (II) Hydroxide is in batteries. In 1904 Thomas Edison used it along with its NiO(OH) oxide as a material for the cathode of alkaline batteries. Its electrocatalytic properties have attracted attention for uses in photocatalysis, electrochromic devices, adsorbents and nanostructure precursors. Furthermore, it has potential use as a pigment due to its high reflectance. The redox transition between Ni(OH)2 and NiO(OH) has also been used in the catalytic oxidation of many small organic compounds in alkaline electrolyte. Furthermore, it has been used for the development of electrochemical sensors for the determination of Vitamin D3, or cholecalciferol, a form of Vitamin D that can be obtained by exposing the skin to sunlight or through some foods (egg yolk, cow's milk, fresh salmon and cod liver oil).