Tungsten Trioxide Two-Dimensional Material

Tungsten trioxide, as an important transition metal oxide, has been widely used in many fields of research, such as photochromism, electrochromism, lithium-ion batteries and gas-sensitive materials.

Tungsten trioxide has a forbidden band width of about 2.6 eV due to its different crystal structure. Tungsten trioxide is theoretically only able to use 12% of the sun's light, the same in the field of photocatalysis has received widespread attention.

At present, the research on photocatalytic properties of tungsten trioxide is mainly based on monoclinic tungsten trioxide. The other crystal structure of tungsten trioxide research less. As the crystal structure is the fundamental reason affecting the photocatalyst performance, it is necessary to study the different crystal structure of tungsten trioxide. In addition, the micro-morphology of tungsten trioxide can also affect its photocatalytic activity, which is mainly reflected in the specific surface area and other factors.

Tungsten dioxide two-dimensional material has become a research hotspot due to its unique structural characteristics. Tungsten dioxide two-dimensional material has a large specific surface area, can provide more adsorption sites and reactive sites. Its structural anisotropy will enable photonic carriers to have different migration rates in different directions. Therefore, in the thickness direction of the two-dimensional material of tungsten trioxide, the photo-generated carrier migration rate will be much larger than the other directions.

This is because the photo-generated carriers are limited in this direction to a minimum. At the same time compared with other morphological similar materials, tungsten dioxide two-dimensional material has more excellent photocatalytic activity. In addition, the construction of the hierarchical structure is also considered as a more effective method to improve the photocatalytic performance of the sample. Due to the large specific surface area and the different surface properties of the graded structure, the unique surface properties also affect the light absorption properties of the two-dimensional tungsten oxide material.

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