Do you believe that wheat straw, apple pomace, pineapple shell and other wastes can be converted into hard diamond materials after special treatment. The reporter learned from the Shanghai Institute of Electrical Engineering yesterday that the school's professor Li Rongbin led the team to complete the transformation in the laboratory. The carbon-containing agricultural waste can become a “diamond coated porous electrodeâ€. This semiconductor material has important application value in the field of environmental protection. . It is reported that this research has been included in the National Natural Science Foundation of China this year, and it is expected to open up a new way of turning waste into treasure. Diamond is the hardest substance in nature, commonly known as "diamond", also known as "gold diamond." This kind of mineral can not only be made into precious jewellery, but also has many industrial uses, especially synthetic diamond materials, which are widely used in the industrial field. Li Rongbin said that diamond is a kind of mineral composed of pure carbon, and the main component of agricultural waste such as wheat straw and apple slag, cellulose material, is the natural “rich ore†of carbon. "These wastes can turn into diamond materials." At present, the Li Rongbin team has successfully implemented this transformation in the laboratory. They use temperature and pressure changes to remove moisture and large amounts of organic matter from the waste, and then use powder metallurgy to leave their natural "carbon skeleton." The "porous activated carbon" produced at this time is loose and porous, and some like charcoal, which initially has good electrical conductivity and thermal conductivity. Then, after treatment by a technique such as "in situ reaction", the porous activated carbon eventually becomes a "diamond coated porous electrode". It is reported that the diamond coated porous electrode is a kind of semiconductor electronic equipment, which can decompose benzene and phenolic toxic organic substances in industrial sewage, thereby eliminating the pollution of water environment by industries such as microelectronics. Li Rongbin said that the diamond coated porous electrode produced by this "turning waste into treasure" technology has many advantages such as large size and good catalytic performance. Since the "raw materials" such as wheat straw and apple pomace are inexhaustible, the preparation cost is very low, and after industrialization, there is a significant cost advantage compared with the currently used silicon material electrodes. "Through the National Natural Science Foundation project launched this year, we will optimize this technology and strive to let it go out of the laboratory as soon as possible to contribute to environmental governance." Li Rongbin said.
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