Tungsten trioxide and its hydrated oxides are important n-type semiconductor materials with a band gap between 2.4 and 2.8 eV. They have excellent physicochemical properties and unique electrocatalytic activity, and are applied in the fields of electrochromic, gas sensing, electrocatalysis, and photocatalysis.

1. Solution to the wear of abrasive particle

When there is no other failure mechanism which plays an important role, the lifetime of bits depends on the wear state of the tungsten carbide button. The service life of the bits can be extended by improving the wear resistance of buttons appropriately. In addition, the wear resistance of the side button should be higher than that of middle button. 

Photoelectrochemical cells (PEC) decompose water to produce hydrogen by converting solar energy into chemical energy. It is considered to be one of the most important ways to obtain energy by replacing fossil energy, and it has received widespread attention. Finding a semiconductor material with potential applications through various methods is an important research direction in this field.

Electrochromism refers to the reversible change in light transmittance and/or reflectance associated with an electrochemical redox reaction after the material is applied with an appropriate voltage. Applications of electrochromic devices include: smart windows for cars and buildings, controllable light reflection or light transmissive display devices (for optical information and storage), controllable aircraft canopies, reusable price tags, spacecraft Thermal control and more.