With the development of science and technology, the research trend of self-lubricating technology is that solid lubricating materials without environmental pollution, long wear-resistant life, low friction and self-repairing are more and more widely used in high-tech fields such as electronics, biology, communications, aerospace and aviation. Future research mainly focuses on the research of new solid self-lubricating materials, new self-lubricating methods, new material structure design and other aspects.

Stamping die is an indispensable technological equipment for stamping production and a technology-intensive product. The quality, production efficiency and production cost of stamping parts are directly related to die design and precision quality of die parts.

At present, indoor and outdoor environmental pollution has become increasingly prominent. Photocatalytic materials can use sunlight to degrade various gas-phase and liquid-phase pollutants harmful to the environment and mineralize them into harmless water and carbon dioxide. Photocatalytic method is a very economical, convenient and feasible method to purify the environment, and its related research has attracted great attention. However, there are two problems in current photocatalytic materials, one is poor visible light response, the other is low efficiency.

Tungsten disulfide has good corrosion resistance, good adsorption capacity on metal surface, generally can withstand strong acid corrosion, high temperature resistance and low friction coefficient. Therefore, tungsten disulfide is usually used as a lubricant. Lubrication under various harsh conditions such as high temperature, high pressure, high load, high speed, high radiation, strong corrosion and ultra-low temperature.

137Cs is the main heat-releasing nuclide in high-level radioactive waste liquor. If it can be separated, the radioactive level of high-level radioactive waste liquor will be greatly reduced, and the cost of subsequent treatment of radioactive waste liquor and solid waste disposal will be reduced. In addition, 137Cs can be used as gamma radiation source in breeding, food irradiation storage, sterilization of medical devices, cancer treatment and various instrumentation fields. Therefore, the separation of 137Cs from high-level radioactive waste liquor has been one of the hotspots in the field of spent fuel reprocessing at home and abroad, and also an important goal in the process of reprocessing.

SCR denitration technology is a necessary means for power plants to achieve ultra-clean emissions. Catalysts, as a core part of SCR denitration technology, lose their activity due to wear or blockage during operation. Some of the regenerable catalysts can be reused after regeneration, while the catalysts that cannot be regenerated face the situation of rational utilization and disposal.

The US White House issued a statement saying that in order to boycott China’s acquisition of US technology, the United States will still impose a 25% tariff on 50 billion Chinese goods, mainly related to the “Made in China 2025” related industries, and also invest in China’s high-tech industries in the United States. Set new limits. The list of specific commodities will be announced on June 15 and tariffs will be implemented shortly thereafter.

With the rapid development of human society and economy, energy and environmental problems have become increasingly prominent. Organic dye wastewater pollution has become one of the most concerned environmental problems. These organic dye molecules not only destroy the ecological environment, but also contain aromatic intermediates which are carcinogenic.

With the rapid rise of global energy demand and the increasing problem of greenhouse gas emissions, the deployment of hydrogen energy industry has become one of the important strategies to solve the sustainable development of society, economy and environment. Hydrogen is widely used to synthesize and upgrade liquid fuels to replace traditional petroleum to produce gasoline and diesel. Meanwhile, proton exchange membrane fuel cells (PEMFCs) fueled with hydrogen have high energy conversion efficiency, and the byproduct is only water, which is expected to become the power core of a new generation of vehicles.

Cadmium selenide nanocrystals are the most widely studied and promising class of II-VI semiconductor nanocrystals. They have attracted worldwide attention due to their important non-linear optical properties, luminescent properties and other physical and chemical properties.