A technology for producing graphene from vegetable oil has been created
Australian scientists have learned how to synthesize graphene from vegetable oil and food waste.
Graphene is a material that is a flat layer of ordered carbon atoms and demonstrates amazing properties in the laboratory: tremendous mechanical strength and elasticity, thermal and electrical conductivity. It is constantly called “the material of the future” and is even gradually being applied in practice.
However, the widespread use of graphene is still hampered by the high cost of production and the difficulty of obtaining sufficiently large and high-quality samples, especially on an industrial scale. So far, this task requires the application of enormous temperatures and pressures for a long time, making graphene too expensive an innovation.
Dozens of scientific groups around the world are looking for new, simple and affordable ways to obtain graphene, including scientists led by Zhao Jun Han and Konstantin Ostrikov from the Australian State Association for Scientific and Applied Research (CSIRO). They reported their latest results in an article published by the magazine Nature Communicationsand these results look very promising.
The GraphAir technology, which the scientists describe, makes it possible to obtain graphene from the most ordinary and “pure” natural resource – from soybeans. The vegetable oil squeezed out of them is quickly burned at a high temperature and in the presence of a metal catalyst (the authors used polycrystalline nickel foil). The oil decomposes into a mixture of various combustion products, including carbon black, the suspension of which fills a chamber made of heat-resistant and inert quartz glass.
Then the “workpiece” is cooled, and a thin layer of monatomic carbon, graphene, is deposited on the catalyst film (already at normal temperature), the formation of which was stimulated by the structure of the foil surface. Zhao Junhan demonstrates one of such samples in the illustration to this material.
Of course, soy is not the only possible resource for producing the “material of the future” with GraphAir technology. The authors note that other vegetable, oil-rich raw materials, or even oil already used in the kitchen for cooking, are quite suitable for this purpose. “This unique technology should reduce the cost of graphene production and stimulate its use in various areas of life,” Australian scientists say.
During the week
It became known how many T-14 tanks based on “Armata” the Russian army will receive this year
The first 20 T-14 tanks based on the Armata heavy tracked platform will be handed over to the Armed Forces by the end of the year. Earlier, the army received T-90M “Breakthrough” combat vehicles.
Longest-lived exotic particle discovered that will change modern physics
Analyzing data from the LHCb detector installed at the Large Hadron Collider, scientists have found reliable evidence for the existence of a unique particle – a doubly overtly charmed tetraquark. And no matter how outlandish its name sounds for a person who is not familiar with the Standard Model, it gives physicists even more strange information: it seems that modern scientific ideas about the structure of the world will again have to be pretty shaken up.
Source: Starliner test postponed due to serious technical problems
According to a knowledgeable TASS source in the space industry, the reason for the transfer of tests of the new American spacecraft was problems with the engine valves. How long it will take to eliminate them is unknown.
The largest system of ocean currents has practically slowed down
A scientist from Germany came to the conclusion that in the near future the network of global ocean currents will slow down to critical levels. This will affect the climate in Europe and America, as well as the ecosystem of the Atlantic Ocean.
The head of ULA explains why the American alternative RD-180 has been under development for so long
Russian-speaking critics of Elon Musk in particular and of the entire American cosmonautics in general often forget that SpaceX has serious competitors in the United States that have suffered greatly from the actions of this company. Under the pressure of the success of the eccentric billionaire’s firm, they are forced to get out as best they can. In such an environment, the constant delays in the development of the Atlas V successor using Russian RD-180 engines – ULA’s Vulcan Centaur missiles – look odd. So Tori Bruno decided to try to explain them.
The shrinking universe will push us into a black hole. But noticing the end of the world won’t be easy
New work by Russian researchers indicates that the Universe has not always been expanding – and will contract again in the foreseeable future. Moreover, it is doubtful that humans will be able to survive the cycle of its compression. But the good news is that the universe itself is no longer in danger of heat death. We understand the details.
Elon Musk is right: no fusion is needed. The future we won’t have
Before mass thermonuclear power engineering 20 years – and always will be 20 years. This simple joke itself became old 20 years ago. Society is upset that thermonuclear still cannot be brought to an industrial level. And only Elon Musk believes that a thermonuclear reactor is not needed at all. A careful analysis shows that he is right. Even if all the technical problems of thermonuclear energy are miraculously resolved, it will have no chance of ousting competitors. How did it happen, and what then will save humanity from the energy crisis?
An ancient inhabitant of a cave in the Caucasus turned out to be a carrier of the gene of the modern Western Eurasian population
An international team of scientists identified DNA from soil in a Georgian cave. Thanks to this, the researchers managed to restore the human genome 25 thousand years old, without having any skeletal remains.
In South Africa, discovered the remains of the oldest archaea on Earth
Fossils over 3.4 billion years old may be the remnants of archaeal microbes that lived and produced methane from hydrothermal vents at the bottom of the fossil sea.