Niobium pentoxide is a white powder. is a typical n-type transition metal oxide semiconductor with a band gap of 3.4-5.3 e V, a melting point of 1485 (+5 C) and a relative density of 4.47 g/cm. Niobium pentoxide has high chemical stability. It is insoluble in water and acid (except sulfuric acid and hydrofluoric acid), and can dissolve in alkali metals, carbonates and hydroxides in molten state.
Niobium pentoxide is a kind of multi-morphology oxide. The transformation of each morphology is controlled and influenced by the factors of raw material, pressure and temperature.In industry, it can be used to make nickel niobate single crystal, special optical glass, optical filter, piezoelectric ceramic element, gas sensor, piezochromic material, lithium battery composite material, high frequency/low frequency capacitor, refractory material and catalyst.
Niobium pentoxide is widely used in many fields such as gas sensing, catalysis, electrochromic, photoelectrodes, field emission displays and microelectronics, solar cells and photoelectric properties. In recent years, the use of solid catalysts instead of stoichiometric reagents in industrial chemical synthesis has become a new environmental remediation technology. Niobium pentoxide has potential application value because of its strong acid surface and high stability in various acid catalysis in aquiferous media. Pure or doped niobium pentoxide has attracted more and more attention in the degradation of organic pollutants.