## 3 Results and Discussion
### Characteristics of Anb/C and Anb/AgNP/C Composites
\begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & \multicolumn{2}{c}{**Surface Area (S\({}_{BET}\))**} & \multicolumn{2}{c}{**Pore Volume**} & \multicolumn{3}{c}{**Pore Size Distribution**} \\  & \multicolumn{2}{c}{**(m\({}^{2}\)/g)**} & \multicolumn{2}{c}{**(cm\({}^{3}\)/g)**} & \multicolumn{3}{c}{**(nm)**} \\ \cline{2-7}  & **S\({}_{\text{Total}}\)1** & **S\({}_{\text{mic}}\)2** & **V\({}_{\text{Total}}\)3** & **V\({}_{\text{mic}}\)4** & **D\({}_{\text{h}}\)5** & **D\({}_{\text{mo(NLDFT)}}\)6** & **D\({}_{\text{mo(HKO)}}\)7** \\ \hline
**AC** & 1441 & 1071 & 0.80 & 0.49 & 2.22 & 0.54 & 0.52 \\ \hline
**Anb/C** & 1234 & 666 & 0.72 & 0.35 & 2.33 & 0.61 & 0.55 \\ \hline
**Anb/AgNP/C** & 1207 & 535 & 0.69 & 0.29 & 2.29 & 0.71 & 0.56 \\ \hline \hline \end{tabular}  
* \({}^{1}\) BET surface area calculated using experimental points at a relative pressure of (\(P/P_{0}\)) 0.035–0.31 where p and p\({}_{0}\) are denoted as the equilibrium and saturation pressure of nitrogen2. Surface area, 3 Total pore volume calculated by 0.0015468 amount of nitrogen adsorbed at p/p\({}_{0}\) = 0.99. 4 Pore volume of micropores calculated by t-plot method with fitted statistical thickness in the range of 3.56 to 4.86 A, 5 Hydraulic pore diameters calculated from the BET surface areas and pore volumes according to the equation: D\({}_{\text{h}}\) = 4 V/S; 6 The pore diameter estimated from PSD maximum of nonlocal density functional theory; 7 The pore diameter estimated from PSD maximum of Horvath-Kawazoe theory.  
\end{table} 
Table 2: The values of textural parameters of the porous structure of AC and composite samples. micropores and pore volume were also significantly lower (by 405 m\({}^{2}\)/g and pore volume lower by 0.14 cm\({}^{3}\)/g and 536 m\({}^{2}\)/g and pore volume lower by 0.20 cm\({}^{3}\)/g for both samples). Thermal analysis of final products was performed to assess their thermal stability before and after the adsorption of nitrogenous bases. Figure 4 shows the results of thermal analysis represented by the first derivative of the thermogravimetric curves (DTG in Figure 4A), mass loss versus temperature (TG curves in Figure 4B), and differential scanning calorimetry (DSC curves in Figure 4C) for the single nitrogenous base, nitrogenous base/carbon material, and AgNP modified nitrogenous bases/carbon material. The initial carbon carrier remains stable up to approximately 450 \({}^{\circ}\)C, as evidenced by the lack of significant changes in the temperature range below this point. In the range of 400-950 \({}^{\circ}\)C, the exothermic surface oxidation and pyrolysis process were observed. The total mass loss up to 800 \({}^{\circ}\)C for the initial carbon sample was specified as 86%. On this basis, the carbon samples loaded with Anb and AgNP were also analyzed. Higher mass losses were observed for all modified samples as well as for individual Anb. Figure 3: (**A**) Nitrogen adsorption–desorption isotherms plots at 77 K of investigated samples; (**B–D**) Porosity distributions by Horvath-Kawazoe (differential pore volume plots) and Nonlocal Density Functional Theory (NLDFT); (**E–G**) Porosity distributions by BJH theory. For the individual nitrogenous base, the first step includes the temperature range from 200 \({}^{\circ}\)C to 300 \({}^{\circ}\)C (endothermic peak at 286 \({}^{\circ}\)C) and the additional DTG exopeak observed at 550 \({}^{\circ}\)C. After the adsorption of nitrogenous bases and a further AgNP, the shift of the initial signal to the lower temperature was observed. The \(\Delta\)T was described as 32 \({}^{\circ}\)C and the next 21 \({}^{\circ}\)C for Anb/C and Anb/AgNP/C samples, respectively, and indicates a decrease in the thermal stability of the nitrogenous base after binding it in the form of an adsorbed system. The occurrence of mass loss due to carbon dioxide and water release (IR spectra, Figure 4D) was confirmed during an evolved gas analysis of Anb/AgNP/C (by FTIR).