Energy conservation is a problem that must be considered in the sustainable development of every country's economy. In the energy consumption of many countries, building energy consumption accounts for about 30 ~ 40% of the national energy consumption, while the energy consumed through glass doors and windows accounts for more than 50% of the energy consumption of the building. If the transmission of near infrared light is reduced, the heat shielding effect will be greatly improved. Transparent heat insulation coating and transparent heat insulation film have bright prospects for economic, convenient use and good insulation effect.

The modification methods of bismuth tungstate can be used in various ways. Researchers have provided a method for the preparation of bismuth / polyaniline composite photocatalyst with a simple process and excellent product performance. It is said that the composite photocatalyst has a good effect on the treatment of methylene blue in sewage.

With the rapid development of science and technology, many new desulphurization technologies have been developed. Catalytic oxidation desulfurization is a new desulfurization technology. Catalytic oxidation desulfurization has a wide range of applications, the process does not consume hydrogen, and is easy to implement. The catalyst plays a very important role.

The traditional coarse grain tungsten carbide powder is produced by using the coarse tungsten powder reduced by Li⁺ or Na⁺, and rolling ball milling in the common carburizing device, and then heating in the ordinary carbon tube for high temperature (1800 to 2000 degrees C) for a long time carbonization.

Adding a certain amount of rare earth elements in tungsten can change the properties of tungsten wire, such as adding cerium or thorium in tungsten can improve the electronic emission and ablative ability of the tungsten, and improve the processing properties of tungsten. The tungsten alloy wire and products produced by these characteristics are mainly used for electron tube hot wire, argon arc welding electrode and pulse tube heating wire.

The key of photocatalytic technology is the photocatalyst. Bismuth tungstate as a new type of bismuth series of new photocatalyst. It is a multicomponent compound with layered structure. The lamellar formation is formed by the common angle of the WO₆ eight sides, and a layer of [Bi₂O₂]²⁺ is distributed between layers. Bi₂WO₆ is a typical bismuth series photocatalyst. It exhibits excellent visible light photocatalytic activity in environmental pollution control and solar energy conversion. Bi2WO6 has high catalytic activity under visible light irradiation, which can cleavage aquatic O₂ and degrade organic matter.

Bismuth tungstate (Bi₂WO₆) is the most simple structure of Aurivillius type oxide. Its Bi₆s orbit and O₂p orbit are hybridized to form the valence band. The W₅d orbit forms a guide band, and its band gap is narrower (about 2.7eV). It can absorb some visible light and be excited. Therefore, the Bi2WO6 photocatalytic material is in the field of environmental purification and new energy development. Potential application value.

With the development of nanomaterials technology, semiconductor photocatalysis technology has broad prospects for development. In particular, the development of visible light responsive semiconductor photocatalytic materials further promotes the application of semiconductor photocatalysis technology in the field of environmental remediation.

A large number of domestic sewage and industrial waste water are discharged into rivers and lakes, resulting in eutrophication of water bodies, affecting the safety of water and living environment. The algae outbreak will cause the oxygen depletion in the water to lead to the death of the fish. The toxins released by some algae will poison the organisms. We should deal with the algae pollution quickly and effectively. It is an urgent need to control the water pollution.

With the development of shipping industry, marine and river water pollution caused by ships is becoming more and more serious. Some researchers have proposed a scheme of photocatalytic treatment of ship oil sewage by pre separation + fine filtration + deep oxidation.