INVESTIGATION OF THE FUNCTIONAL LAYER FORMATION ON THE SURFACE OF CARBON MATERIAL
Abdimomyn S. Atchabarova A. Abduakhytova D. Tokpayev R. Kishibayev K. Khavaza T. Kurbatov A. Turdean G.L. Nauryzbayev M.
2022Babes-Bolyai University
Studia Universitatis Babes-Bolyai Chemia
2022#67Issue 4151 - 167 pp.
In this study, a comparison of walnut-based carbon materials (CM) obtained by hydrothermal carbonization (HTC) and HTC in combination with steam gas activation (SGA) was carried out. In order to study the effect of steam activation on the functional layer formation, the obtained materials were studied by SEM, nitrogen adsorption/desorption by Brunauer-Emmett-Teller (BET) method, Raman spectroscopy, X-ray diffraction spectroscopy (XRD), X-ray fluorescence elemental analysis (XRF). Functional groups (FG) were evaluated qualitatively and quantitatively by Fourier transform infrared spectroscopy (FTIR), acetone extract analysis of CM by gas chromatography-mass spectrometry (GC-MS), and potentiometrically Boehm titration. The described mechanism of the influence of the base nature on the surface functionality correlates well with the results of the powder addition method. The HTC or HTC+SGA treatment provides a wide range of possibilities for further controlled modification of the carbon sorbent surface for specific adsorption purposes.
activated carbon , carbon material , functional layer , hydrothermal carbonization , thermal carbonization , walnut shell
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Center of Physical Chemical Methods of Research and Analysis, al-Farabi, Kazakh National University, Almaty, Kazakhstan
Babeş-Bolyai University, Faculty of Chemistry and Chemical Engineering, 11 Arany Janos str, Cluj-Napoca, RO-400028, Romania
Center of Physical Chemical Methods of Research and Analysis
Babeş-Bolyai University
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