Effect of Topography on Properties of Tungsten Trioxide

The effect of topography on the properties of tungsten trioxide materials is largely changed from the specific surface area of tungsten trioxide, the surface structure, the different exposed crystal planes of different topographies, and the quantum size effect.

The hierarchical structure composed of self-assembled structural elements such as nanorods, nanosheets and nanowires is an important process for the synthesis of functional materials. The complex structure, size and morphology of these inorganic materials have an important impact on the light, electricity and other properties of tungsten trioxide. Some scholars take the special morphology of tungstate as precursor, obtained by the ion exchange method the same structure of hollow structure of tungsten oxide. The hollow graded structure has a larger specific surface area than bulk tungsten trioxide. At the same time provide more active sites, thereby enhancing the photocatalytic properties. In addition, the hollow graded structure enhances the light transmission efficiency so that the tungsten trioxide having a hollow structure has a higher photocatalytic activity than the bulk tungsten trioxide. An anti-pebble structure tungsten trioxide photoanode was synthesized by using PS spheres as templates. Such a structure has some properties of photonic crystals, such as a slow light effect and the like. The slow light effect can slow down the propagation speed of light when light propagates in the medium and increase the interaction between light and medium, thereby increasing the absorption and utilization of light by the material and exhibiting more excellent photoelectric activity.

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