In the worsening global situation of greenhouse effect and environmental pollution, photocatalytic hydrogen production using solar energy, which is rich in nature, is one of the new energy ways for sustainable development. Photoelectric catalytic water decomposition is used to produce hydrogen from solar energy and water. There are no by-products, and hydrogen and oxygen can be obtained at the two poles separately without pollution, showing strong advantages and development potential.

The traditional method of hard chromium plating on metal surface has many problems, such as complex process, low deposition rate, difficult to deposit thick coatings, softening of chromium plating layer when the temperature reaches above 260 ℃, leading to a significant decrease in wear resistance and environmental pollution caused by hard chromium plating.

Ultra-fine cemented carbide made from ultra-fine tungsten carbide powder has the characteristics of high strength and high hardness, which effectively solves the contradiction between hardness and strength of traditional cemented carbide. It is widely used in making micro-drills for integrated circuit board, printing needles for dot matrix printers, precision tooling, cutting tools for difficult-to-process materials, woodworking tools, medical dental drills and so on.

2-acetylthiophene is an important intermediate in organic synthesis. It has been widely used in the synthesis of medicines and pesticides, such as antibiotics, plant growth regulators, androgen inhibitors, fungicides and herbicides.