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Nano iron

Edit: Ccdanni 2020-02-10 Mobile

  Because of its excellent properties, nanometer iron plays an important role in the fields of wastewater treatment, medical health, military science and technology, etc. Therefore, nanometer iron has attracted people's attention.

  In the 21st century, nanotechnology has developed rapidly and has become a hot frontier discipline in the field of science and technology. It has received much attention from governments and science and technology workers in various countries. The particle size of nanomaterials is between 1-100nm, and it has quantum size effect, small size effect, surface and interface effect, and macro quantum tunnel effect. It exhibits unique macro physical and chemical properties, such as high specific heat capacity, low melting point, high Strength, high toughness, high plasticity, high thermal expansion coefficient, etc. make it widely used in daily life and high-tech fields in the future.

  The mechanical and electrical properties of nano-iron can make it a high-strength, super-hard, high-toughness, super-plastic material, as well as insulating materials, electrode materials, and superconducting materials; its thermal properties make it a low-temperature sintered material, heat-exchange material, and Heat-resistant materials, etc .; its magnetic properties can be used in permanent magnets, magnetic fluids, magnetic recording materials, etc .; its optical properties can be used in light reflection, light storage, optical switches, infrared sensors, etc .; its fuel properties are available again For rocket fuel additives, flame retardants, etc. Research on the performance analysis, development and application of nanomaterials will promote the development of nanomaterials science.

  Nano-iron for wastewater treatment

  Nano-zero-valent iron has a better treatment effect on chromium-containing wastewater, dye wastewater, and polychlorinated organic wastewater. The treatment of wastewater is mainly the result of comprehensive effects such as micro-electrolysis, coagulation, reduction, and adsorption.

  With the development of the organic chemical industry, organic chlorides have been widely used in medicine, tanning, electronics and pesticides, resulting in a large number of chlorine-containing compounds and intermediate products or by-products in the synthesis process are discharged into the environment in large quantities. Some organic chlorides in the environment consume ozone in the atmosphere, and some can harm the central nervous system and cause cancer. The researchers used iron particles with a particle size of 10-20nm to treat harmful impurities in water, and proved that nano-iron can quickly reduce carbon tetrachloride (CT) and trichloromethane (CF) in water, and its effective rate is 2 to that of ordinary iron. 8 times; organic matter such as herbicides applied to farmland can often be detected in rainwater, rivers and lakes. Once these polluted water becomes drinking water, it may cause cancer.

  

  Nano-iron for medical use

  The paramagnetic nano-iron nuclides obtained by irradiating nano-iron with pulsed neutron reactors have superparamagnetism, radioactivity and good magnetic guidance function, can be effectively located in the target area, and can be delivered to the disease efficiently and in a targeted manner. Organs and tissues; German researchers are studying the use of nano-iron to treat cancer, and by applying an external magnetic field, the nanoparticles introduced into the tumor become high fever, causing some cancer cells to die and liquefy.

  Nano-iron is used as absorbing material

  The use of nanomaterials has a large specific surface area, a high proportion of surface atoms, and an increase in dangling bonds, so that it has the characteristics of interfacial polarization and multiple scattering, and can be a good absorber. By using epoxy resin as the matrix and nano-iron particles as the absorbent, a structural wave absorbing material with good wave absorbing function can be synthesized, which can reduce the harm to human health caused by stray electromagnetic waves of household appliances.

  In the military field, nano-iron can use its characteristics to absorb and attenuate incident electromagnetic waves, convert them into thermal energy and dissipate them or make electromagnetic waves disappear due to interference, making it difficult to find, identify, track and attack equipment.

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