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.

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.

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.

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.

Tetracycline antibiotics are a kind of broad-spectrum antibiotics produced by Streptomyces, including aureomycin, oxytetracycline, tetracycline and so on. The use and abuse of these antibiotics make most of the antibiotics not fully absorbed by animals or human body and directly discharged into the water body, which has a serious impact on the environmental system and is regarded as a typical micro-polluted organic matter. The removal of antibiotics represented by tetracyclines has become an urgent scientific research problem.

Propylene is one of the most important basic organic raw materials after ethylene. Its maximum use is to produce polypropylene, accounting for about 60%, followed by acrylonitrile, propylene oxide, isopropyl benzene, isopropanol, carbonyl alcohol and other downstream products.

Ultrafine tungsten carbide powder commonly produced on the market is produced by carbon tube furnace or molybdenum wire furnace after mixing nanometer, ultrafine or fine tungsten powder with carbon black, then crushed by ball mill, and finally screened to obtain fine tungsten carbide powder products.

Manganese tungstate is an important functional material with tungsten-manganese-iron structure. It has broad application prospects in photoluminescence, optical fibers, Polyferrous materials, photocatalysts, scintillators, humidity sensors and magnetic materials.

The refractory and corrosion resistant tungsten metal is often used as cathode in the production of rare earth metals by molten salt electrolysis. Tungsten cathode usually works at the electrolyte temperature of 1000 ~ 1100 ℃, the electrolytic current of 5500 ~ 6000 A and the electrolytic voltage of 10V. The service life of a tungsten cathode with 80 mm x 780 mm is 6 to 7 months. The most serious loss of tungsten cathode is the middle part above molten salt level, which is mainly related to the oxidation of electrodes at high temperature.

Calcium tungstate (CaWO₄) is a self-excited phosphor, which is an effective luminescent material under X-ray, electron and ultraviolet excitation. Blue fluorescence was observed under 253.7 nm ultraviolet irradiation. The peak wavelength of emission spectrum was 423 nm and the half width was 120 nm. It emits blue light under the excitation of cathode rays. Because of its excellent blue fluorescence, it has been widely used in luminescent coatings, fluorescent lamps, neon lights, X-ray fluorescent screens, scintillation counters and lasers.