High-temperature carbonization of humic acids and a composite of humic acids with graphene oxide


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Abstract

Humic acids (HAs) isolated from high-moor peat have been studied by magic-angle spinning solid-state nuclear magnetic resonance (NMR) spectroscopy, differential scanning calorimetry (DSC), thermogravimetry (TG), and Raman spectroscopy. A composite of HAs with graphene oxide (GO) has been prepared for the first time, and the thermal carbonization (900°C) of both HAs and the HA–GO composite has been carried out. With the use of mass spectrometry, it has been found that CO2 and H2O molecules are mainly released from HAs into the gas phase at a low temperature (to 150°C). At higher temperatures, carbon monoxide and different low-molecular-weight hydrocarbons also begin to be released. From microscopic examinations, it follows that HA forms small agglomerates with sharply outlined edges as a result of carbonization, whereas the composite forms only large aggregates.

About the authors

S. A. Baskakov

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

A. S. Lobach

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

S. G. Vasil’ev

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

N. N. Dremova

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

V. M. Martynenko

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

A. A. Arbuzov

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

Yu. V. Baskakova

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

A. A. Volodin

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

V. I. Volkov

Institute of Problems of Chemical Physics

Email: yshulga@gmail.com
Russian Federation, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432

V. A. Kazakov

Keldysh Research Center

Email: yshulga@gmail.com
Russian Federation, Onezhskaya ul. 8, Moscow, 125438

Yu. M. Shul’ga

National University of Science and Technology MISiS (NITU MISiS)

Author for correspondence.
Email: yshulga@gmail.com
Russian Federation, Leninskii pr. 4, Moscow, 119049

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