Recently, two-dimensional tungsten oxide-tin niobate nanosheet composite semiconductor materials have been prepared by two-step hydrothermal method. The reaction process is simple and the photocatalytic activity of the products is good. The main steps are as follows:

In order to improve the properties of tungsten and tungsten alloys, yttrium doping is a very effective method. It can improve the properties of tungsten and tungsten alloys by changing the reaction sequence, affecting the skeleton and growth, and forming second phase reinforcement phase. Therefore, researchers have developed a method for preparing ultrafine tungsten (W) powder by doping rare earth yttrium (Y) with ammonium paratungstate (APT).

Cemented carbide is known as industrial teeth. Its main component is tungsten carbide (WC). Because cobalt powder has good wettability to tungsten, cobalt is generally used as bonding phase. The conventional proportion is 2-10%. Over the past year, the price of cobalt has been rising, which has seriously affected the production cost of cemented carbides. Experts and scholars around the world are studying new resources of new cemented carbide materials. Tesla is trying to replace cobalt with iron and nickel as new materials for batteries. In the cemented carbide industry, some enterprises use iron and nickel instead of cobalt.

Tungsten trioxide is regarded as one of the most promising photocatalysts because of its visible light response. However, one of the difficult problems it faces is its poor catalytic activity. Although noble metal platinum (Pt) supported tungsten trioxide exhibits high catalytic performance, the price of platinum is unbearable, so it is imperative to study cheaper synthetic materials.