Nitrogen oxide is a serious air pollutant, which can cause environmental problems such as acid rain and photochemistry smog. It can also cause direct harm to human respiratory system. To win the Blue Sky Defense War, the important task is to effectively control the emission of NO_x.

Nano tungsten-copper composites have excellent properties of tungsten and copper, and are widely used in electrode materials, electrical contact materials, electronic packaging materials and heat sink materials. However, the disadvantages of immiscible tungsten and copper elements, large melting point difference, poor wettability and low density after sintering lead to the decrease of properties and the increase of production cost of tungsten-copper composites.

Cesium tungstate (Cs₂WO₄) is a new material discovered in recent years. At present, some famous coating companies in Japan, Germany, the United States and other countries are vigorously developing transparent heat insulation coatings of cesium tungstate.

Tungsten trioxide (WO₃) is an important n-type semiconductor oxide. It has many crystal structures. It has been extensively studied because of its unique physical and chemical properties. It has been applied in the fields of electrochromic, photochromic, sensing and catalysis.

Ultrafine/nanocrystalline cemented carbides overcome the contradiction between strength and toughness, have high toughness and wear resistance, and have become a hotspot in the field of cemented carbide technology in the world.

Bismuth tungstate is a new type of photocatalyst material, which is easily stimulated by visible light, can degrade organic pollutants. The reaction conditions are mild, the degradation is thorough, and the environment is clean. Bismuth tungstate has become one of the hot technologies in the field of pollution control.

Clean energy is one of the most important problems in the sustainable development of human society. Hydrogen is not only an ideal clean energy source, but also an important chemical raw material, which has attracted worldwide attention. On the other hand, hydrogen fuel cell has become one of the hotspots of new energy vehicles in the future due to its high energy, high efficiency and environmental friendliness.

Electrochromic means that the material has reversible color when applied voltage. Materials that can undergo reversible changes in optical properties (e.g., color) based on electrochemical redox reactions are called electrochromic materials. Tungsten oxide has become a hotspot in electrochromic research due to its excellent electrochromic properties.

Bismuth tungstate Bi₂WO₆ is a new photocatalyst material. Because of its non-toxicity, low cost, high stability, easy preparation and good visible light response, Bi₂WO₆ has broad application prospects in light, electrochromic materials, photoelectrochemical hydrogen production, photocatalytic degradation of organic compounds and solar cells.

Ultrafine cemented carbide has the advantages of high hardness, high strength and good toughness. It is called "double-high" cemented carbide, and is widely used in high-efficiency precision tools, micro-drills, micro-milling, blades, precision molds and so on.