In 2017, scientists in the UK and China have used different methods to achieve precise control over the spacing of graphene oxide layers. This allows smaller water molecules to pass through, while salt ions are "trapped" at the door. This result demonstrates the great potential of graphene oxide in seawater desalination.
　　Graphene oxide is the "twin brother" of graphene. Since 2004, when British physicists in the laboratory used the seemingly miraculous "duct-tape" method to peel the graphene oxide molecules out of a chunk of graphite, it has been possible to create a new graphene oxide molecule. Graphene is a scientific term that has become commonplace since scientists theorized that a single layer of graphene could never be stable. In just over a decade, research surrounding graphene has developed rapidly and has shown tremendous promise for application.
　　Graphene is a member of the "family of carbon materials", consisting of a single carbon atom arranged in a plane in a hexagonal honeycomb structure. A layered material. Since its thickness is the size of a single carbon atom, about 0.34 nanometers, or one-twentieth of a hair, it is The thinnest material ever discovered by mankind, graphene is also known as a two-dimensional material.
　　Thanks to this special two-dimensional atomic structure, graphene exhibits many exotic properties that ordinary three-dimensional materials do not possess. A single layer of graphene has a light transmittance of 97.7 percent, making it almost completely transparent to the naked eye. It has excellent thermal conductivity, with more than twice the thermal conductivity of diamond. The mechanical strength of graphene is so great that it is 200 times stronger than steel, and if you were to make a hammock out of 1 square meter of single layer graphene. A mere 0.34 nanometers thick would be enough to hold a cat steady. Graphene also has very good electrical properties, conductivity stronger than silver and copper, and higher carrier mobility than carbon nanotubes and silicon.
　　Based on the excellent physical properties of graphene, people have high expectations for its applications. Research in the last decade has shown that graphene has a significant role in basic research, high-frequency electronic devices, flexible displays, electrochemical biosensors, new energy, and other applications. It has extraordinary application potential in battery, super capacitor, thermal conductive material, aerospace and other fields, and is known as "black gold" and "new material". The King".
　　Among the many potential applications, graphene water purification technology is not only highly feasible in principle, but has also achieved many successes in the laboratory. Major breakthrough. As we all know, activated carbon, as a common traditional wastewater treatment material, has a lot of loose pores inside, with strong adsorption capacity. The special laminar and pore-like structure of graphene makes its adsorption capacity hundreds or thousands of times higher than that of activated carbon. On this basis, through microscopic control, modification and modification, scientists have created many different kinds of graphene with super-efficient adsorption properties. Graphene-based adsorbents, which not only adsorb pollutants hundreds of times greater than their own mass, but can also be recycled, greatly reducing the number of Cost of use. It can be said that graphene offers surprising new solutions in wastewater treatment and seawater desalination.
　　At present, China's graphene industry has been included in the National Strategic Emerging Industry Development Plan of the 13th Five-Year Plan and the "Made in China" plan. 2025" is one of the key development areas. China's research level in the field of graphene is very competitive in the international arena, including graphene water purification technology, some of the technology Breakthroughs are gradually moving from the laboratory to market applications. We believe that new technologies and inventions related to graphene will enter people's daily life in the near future, bringing tremendous benefits to mankind. Gospel.
Surprise.