## 3 Results
### CO\({}_{2}\) Adsorption  
For understanding how the functionalization has affected the physisorption of the rGO, TGA was used as a technique where the mass of CO\({}_{2}\) was calculated for the initial mass of the monolith. In Table 4, all the obtained results are shown. Table 4 and Figure S5 show the different adsorptions of CO\({}_{2}\) for the different functionalized and blank rGO. High adsorption is observed for the blank sample of the rGO60_0.5 system at 25 \({}^{\circ}\)C and relatively more minor for the same system at 60 \({}^{\circ}\)C. In all cases at the higher temperature conditions, the adsorption is around 50% less. At 25 \({}^{\circ}\)C, the adsorption after functionalization led to substantially lower adsorptions for samples with TMON and TMOSN and approximately 15% less for the case of TMOS. Similar results were obtained when the temperature was at 60 \({}^{\circ}\)C, TMOS > TMOSN > TMON. For the system rGO60_2, the modification of the rGO showed better results of increased CO\({}_{2}\) adsorption. At 25 \({}^{\circ}\)C out of three modifications, the ones with TMOS and TMON showed higher adsorption with an increase of +15% and +26% compared with the blank one. The higher adsorption at this temperature was for TMON > TMOS > TMOSN. At the higher temperature of 60 \({}^{\circ}\)C, no modified sample showed higher adsorptions than the initial, but the ones with TMOS and TMON showed the same and were close to the blank one (TMON-TMOS > TMOSN). Furthermore, the 90 \({}^{\circ}\)C showed increased adsorptions but more for the composites prepared with higher AsA content. For system rGO90_0.5, no increased adsorptions were observed compared with the blank ones, similar to rGO60_0.5. For the modified samples at \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & **CO\({}_{2}\) (25 \({}^{\circ}\)C)** & \multirow{2}{*}{**\%**} & **CO\({}_{2}\) (60 \({}^{\circ}\)C)** & \multirow{2}{*}{**\%**} \\  & **mmol/g** & & **mmol/g** & \\ \hline rGO60\_0.5 & 1.67 & 7.4 & 0.85 & 3.7 \\ \hline rGO60\_2 & 0.68 & 3.0 & 0.53 & 2.3 \\ \hline rGO90\_0.5 & 1.14 & 5.0 & 0.75 & 3.3 \\ \hline rGO90\_2 & 0.60 & 2.6 & 0.40 & 1.8 \\ \hline S60\_0.5 & 1.42 & 6.2 & 0.71 & 3.1 \\ \hline S60\_2 & 0.78 & 3.4 & 0.47 & 2.1 \\ \hline S90\_0.5 & 0.80 & 3.5 & 0.55 & 2.4 \\ \hline S90\_2 & 1.10 & 4.8 & 0.55 & 2.4 \\ \hline N60\_0.5 & 0.94 & 4.1 & 0.48 & 2.1 \\ \hline N60\_2 & 0.86 & 3.8 & 0.47 & 2.1 \\ \hline N90\_0.5 & 0.57 & 2.5 & 0.49 & 2.2 \\ \hline N90\_2 & 0.86 & 3.8 & 0.51 & 2.3 \\ \hline SN60\_0.5 & 1.00 & 4.4 & 0.52 & 2.3 \\ \hline SN60\_2 & 0.53 & 2.3 & 0.34 & 1.5 \\ \hline SN90\_0.5 & 0.60 & 2.6 & 0.44 & 2.0 \\ \hline SN90\_2 & 0.47 & 2.1 & 0.33 & 1.4 \\ \hline \hline \end{tabular}
\end{table} 
Table 4: CO\({}_{2}\) adsorption of all monoliths at two different temperatures (25 \({}^{\circ}\)C and 60 \({}^{\circ}\)C). 25 \({}^{\circ}\)C of the highest adsorption was observed for TMOS samples, then for TMOSN, and last for TMON. As expected, at 60 \({}^{\circ}\)C, TMOS samples showed higher adsorption, followed by TMON and TMOSN samples. The last system studied (rGO90_2) is the one that showed the highest adsorptions of the modified samples when compared with their analogous blank ones. The most significant changes were observed at 25 \({}^{\circ}\)C for sample S90_2, which showed an increase of +83%, then was the N90_2 with a +43%, and the last sample SN90_2, which showed a decrease. In the 60 \({}^{\circ}\)C, the same modified samples showed higher adsorptions with +38% for S90_2 and +28% for N90_2. Finally, interesting results are obtained when comparing the different systems in terms of modifications, temperatures, and AsA contents. The different analogy of AsA is affecting the final adsorptions [8,9]. It was found that none of the modified samples with analogy 0.5 showed higher adsorption compared to the blank analogous. On the contrary, samples with analogy 2 of AsA after modification showed higher adsorption for at least half of them (four at 25 \({}^{\circ}\)C and two at 60 \({}^{\circ}\)C).