Comparison analysis of graphene oxide reduction methods

Bunyaev, V.A.; Chernysheva, M.G.; Popov, A.G.; Grigorieva, A.V.; Badun, G.A.

Авторы: Bunyaev V.A., Chernysheva M.G., Popov A.G., Grigorieva A.V., Badun G.A.
Сборник: Book of Abstract 14th International Conference "Advanced Carbon Nanostructures" - ACNS'2019, July 1-5, 2019 St. Petersburg, Russia
Тезисы
Год издания: 2019
Место издания: Ioffe Physico-Technical Institute St. Petersburg
Первая страница: 210
Последняя страница: 210
Аннотация: Graphene is two-dimensional sheet of sp2-hybridized carbon atoms. There are several methods of reduction of graphene oxide using the compounds that not affected the environment. In this context amino acids, plant extracts, carbohydrates, and organic acids should be mentioned. The potential applications of graphene are transport, performing electrodes; bio-, electrochemical, and chemical sensors; hydrogen storage; catalysts and etc. In present work we compared several methods of graphene oxide reduction and used reduced graphene oxide as a platform for radiolabeling peptide with tritium using tritium thermal activation method. Graphene oxide was purchased from Cheaptubes Ltd. and reduced using several techniques: heating at 90°C in the solution of amino acids, heating at 155°C in water and in the mixture of hydrochloric and trifluoroacetic acids 2:1 with addition of 0.001% of β-mercaptoethanol. Reduced graphene oxide was characterized using Raman and Fourier Transform Infrared spectroscopy. According to Raman spectroscopy analysis quality of reduced graphene oxide obtained in presence of aspartic acid, glycine, valine, lysine, and proline is similar. FTIR spectroscopy analysis indicates the significant reduction and formation of hydrophobic material when graphene oxide was heated in water in comparing with other methods. In present work graphene oxide and reduced graphene oxide obtained by reduction in aspartic acid, acids mixture and water were subjected to tritium atoms bombardment [1]. Samples of graphene oxide and reduced with the aspartic acid show close values of radioactivity measured directly after tritiation. Higher values of the initial radioactivity were observed for the samples of reduced graphene oxide obtained in acids mixture and in water. However, percentage of tritium in CH-bonds determined after purification from the labile tritium (in the functional groups) was higher for graphene oxide and reduced with the aspartic acid. The reasons of the observed results will be discussed in the presentation. This work was supported by Russian Foundation for Basic Research (grant № 18-33-20147). References 1. A. Badun, M.G. Chernysheva, A.V. Grigorieva, E.A. Eremina, A.V. Egorov. // Radiochimica Acta (2016) 104, 593.
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