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Rotnicki, Konrad
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Publications (4/4 displayed)
- 2023The influence of chemical and thermal modifications of ordered mesoporous carbon on the melting processes of water confined in porescitations
- 2021Exploring the effect of surface chemistry in carbon nanopores on melting behavior of watercitations
- 2021Confined effect of water solution of ciprofloxacin in carbon nanotubes studied by Raman and Fourier Transform Infrared Spectroscopy methodscitations
- 2020Phase transitions, molecular dynamics and structural properties of 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ionic liquidcitations
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article
The influence of chemical and thermal modifications of ordered mesoporous carbon on the melting processes of water confined in pores
Abstract
In this work, the mesoporous carbon (MC) of the ordered structure was synthesized using silica (SBA-15) as a template and glucose as a carbon precursor. The received MC was subjected to wet oxidation in nitric acid and thermal treatment at 150, 400, 600 and 800 °C to differ its hydrophobic/hydrophilic character. The obtained unmodified (MC), oxidized (MC-OX) and thermally modified oxidized carbon (MC-OX-150, MC-OX-400, MC-OX-600 and MC-OX-800) were investigated by various techniques: transmission electron microscopy (TEM), scanning electron microscopy (SEM), and low-temperature nitrogen adsorption to characterize material porosity, X-ray photoelectron spectroscopy (XPS) and suspension potentiometric titration (SPT) to provide the statement of quality and quantity of groups presented onto the surface and the surface charge, and dielectric spectroscopy (DS) and differential scanning calorimetry (DSC) to register the changes in the water melting processes in carbon pores. The DS and DSC studies revealed the correlation between the water melting temperature inside the pores of MCs and their chemical characteristics, which were determined mainly by surface functional groups and only slightly by textural properties.