Nickel Oxide Nanoparticles

Oxides of transition metal nickel include Ni (II) oxide (NiO) and Ni (III) oxide (Ni₂O₃). Compared to NiO, Ni₂O₃ is not well characterized and often referred to as black nickel oxide. Ni₂O₃ is used as a composite material with polymers in order to increase the conductivity, for the removal of toxic compounds from aqueous solutions or in ceramics due to their insoluble nature in water. The density of Ni₂O₃ is 4.84 g/cm³ while the melting point is 600°C. NiO nanoparticles have a cubic crystalline structure with a high surface area. NiO is a wide bandgap semiconductor with band gaps ranging from 3.6 eV to 4.0 eV. In addition to this NiO shows good electrochemical performance and has intriguing magnetic, mechanical, electronic and optical properties. NiO nanoparticles have a wide range of application areas including;

• Sensors,
• Memory storage devises,
• Catalysis,
• Cosmetics,
• Optoelectronics and electronics,
• Biomedical,
• Environmental and energy applications and so on...