To study gasehromies mechanisms of WO_3 thin film to H_2 contribute to developing hydrogen sensors of higher sensitivity.

Study on optical and hydrogen sensing properties of nanocrystalline WO_3 films;

WO_3 thin films have more advantage of reducing the components thickness than WO_3 ceramic so WO_3 thin films thin films have the potential in empoldering lower power and lower nonlinear.

The photocatalytic degradation of bromphenol blue(BPB)in aqueous solution was studied with a photocatalytic glass reactor which was made of the glass beads covered by evenly transparent WO_3/TiO_2 thin film in sol-gel process.

This paper introduces and analyzes the preparation methods of nano-WO_3 thin films, as well as its latest researches, applications and future development trend.