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Registration Number

0220U101648, 0115U002961 , R & D reports

Title

Development of physicochemical basis for creation of nanosized materials based on 2D structures and organic conducting polymers

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Head

Koshechko Vyacheslav G., Доктор хімічних наук

Registration Date

17-02-2020

Organization

L. V. Pisarzhevskii Institute Of Physical Chemistry of The National Academy of Sciences of Ukraine

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 It was created the physicochemical foundations of the mechanochemical method of obtaining 2D materials with different electronic structure (conductors - doped graphene, dielectrics - graphene oxide, boron nitride, semiconductors - dichalcogenides of transition metals, carbon nitride), nanocomposites based on these 2D materials and conducting polymers (polyparaphenylene and polyaniline derivatives) and other nanostructured materials; it was investigated their physicochemical properties by means of wide range of complementary experimental methods and was show its practical application as functional materials for new generation technology - electrodes of power sources, electrocatalysts of oxygen reduction and hydrogen evaluation from water, the active component of electrochemical sensors and so on. It was established that the carbonized Co-N-C nanocomposite bifunctional electrocatalysts obtained from nitrogen-containing conjugated polymers are the effective in the process of complete water decomposition in alkaline electrolytes. It was shown that this nanocomposite electrocatalyst based on Mo2C and N, P-doped reduced graphene oxide exhibits the stability in the process of long-term operation of hydrogen evolution. It was established the possibility of the mechanochemical synthesis of nanostructured hybrid perovskites (HP) CH3NH3PbI2X (where X = Cl, Br, I), as well as inorganic perovskite (InP) CsPbBr3. It is shown that mechanochemical synthesis of HP and InP promotes their nanostructuring and formation of crystalline products. It was proposed a new method for obtaining insitu HP nanocrystals in the dispersion of polystyrene in toluene, which allows the use of synthesized perovskite without loss, leads to a homogeneous distribution of HP nanoparticles in the polymer matrix and helps to maintain the high quantum yield of photoluminescence. It is shown that the using of HP nanoparticles in composites with a broadband GAG:Ce phosphor in white LEDs improves the color tr

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2020-04-02