Chemists at Moscow's lomonosov state university recently synthesized and modified a special type of graphene nanoparticle that resembles a jellyfish.These particles are structured so that they can be used to catalyze processes and make conductive polymers.The findings are published in the journal Applied Surface Science.
Graphene is one of the isoforms of carbon, that is, one of the existence forms of "pure" carbon, which is different from other forms in structure and properties.Graphene is a hexagonal two-dimensional crystal.Its strength, thermal conductivity, electrical conductivity and other properties determine that graphene plays an important role in the research of many chemists and nanoelectronic physicists.
The essence of this research is to synthesize unique graphene nanoparticles and modify them.The structures created by the team have interesting shapes: graphene layers bend at the edges, with functional "tails" on the edges.Because it looks like a jellyfish, the team calls it a "jellyfish graphene nanosheet".
The nanoparticles are composed of several thin (less than 50 nanometers) graphene layers whose edges bend due to the properties of the preparation method, which USES a catalyst to accelerate the thermal decomposition of hydrocarbons.After the nitric acid chemical treatment, the edge of the sheet was covered by functional oxygen-containing groups.At high temperatures, the oxygen-containing groups can be converted into nitrogen tails by the action of ammonia.The team used a whole range of chemical and physical methods, including spectroscopy and microscopy, to make it possible to study fine structures.
The researchers say the material has a highly developed specific surface area and can be used to make electrodes for supercapacitors and batteries.In addition, the modification of its surface by nitrogen atoms can help to change its electrochemical and adsorption (absorption) properties, so it can also be used for catalysis and the manufacture of conductive multicomponent polymers.