Bismuth tungstate nanometer is a kind of photocatalytic material with high efficiency, low toxicity and good stability. It is a typical Olivis oxide with perovskite-like WO₆ layer structure and narrow band gap (only about 2.80 eV). It can effectively remove organic pollutants in water by visible light photocatalysis. In the treatment of water pollution, Bi₂WO₆ nanometer is a typical perovskite-like oxide. It has important application value.

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Bismuth tungstate is the simplest orivis oxide with narrow band gap (about 2.7eV) and can absorb part of visible light. This material has been used for photocatalytic degradation of organic pollutants, photocatalytic organic reaction and photocatalytic decomposition of water.

Solid acid catalytic materials have attracted more and more attention because of their unique structure. Niobium tungstate, as a typical solid acid catalytic material, exhibits good catalytic activity, selectivity and stability in some organic synthesis reactions. In addition, due to its unique structure and physicochemical properties, niobium tungstate compounds have attracted widespread interest in piezoelectric, dielectric and thermodynamic aspects.