Various hydrogen sensitive gasochromic materials, such as V_2O_5, MoO_3, and Y-Mg, have been reported. Among them, Catalyst-loaded WO_3 film has been intensively studied to apply to smart windows or optic hydrogen sensors. Although there are many fabrication methods of WO_3, sol-gel method is relatively cost-effective, does not need a large-scale apparatus, can be operated easily, and makes it possible to fabricate metal oxide film on complex shape surface. However, the gasochromic performance and its long-term stability sensitively depends on fabrication conditions.
展开▼
