# Influence of Synthesis Parameters in Obtaining KIT-6 Mesoporous Material
## 3 Results and Discussions
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \multirow{2}{*}{**Samples**} & \multicolumn{4}{c}{**Events/K**} & \multicolumn{4}{c}{**Mass Loss/\%**} \\ \cline{2-9}  & **I** & **II** & **III** & **IV** & **I** & **II** & **III** & **IV** \\ \hline KIT-6 & 298–418 & 418–583 & 583–823 & - & 5.6 & 14.6 & 10.4 & - \\ K0.012 & 298–443 & 443–538 & 538–823 & & 7.7 & 2.6 & 16.6 & \\ K0.022 & 298–383 & 383–546 & 546–823 & & 12.2 & 5.0 & 15.3 & \\ KDT2 & 298–383 & 383–565 & 565–823 & - & 4.4 & 24.0 & 14.6 & - \\ KDT4 & 298–375 & 375–489 & 489–588 & 588–823 & 4.2 & 4.0 & 9.8 & 10.5 \\ KDT8 & 298–460 & 460–600 & & & 4.6 & 14.6 & & \\ KAT12 & 298–388 & 388–598 & 598–823 & - & 10.0 & 17.6 & 4.0 & - \\ KAT18 & 298–463 & 463–823 & - & - & 10.2 & 14.7 & - & - \\ KAT30 & 298–500 & 418–610 & & & 4.6 & 16.6 & & \\ Kdt & 298–403 & 403–603 & 603–823 & & 11.6 & 14.9 & 5.0 & \\ KEt & 298–398 & 398–583 & 583–823 & & 9.8 & 18.0 & 4.3 & \\ KPr & 298–413 & 413–593 & 593–823 & & 13.4 & 13.0 & 6.4 & \\ KHT12 & 298–458 & 458–823 & - & - & 6.2 & 17.1 & - & - \\ KHT18 & 298–458 & 458–823 & - & - & 9.0 & 17.4 & - & - \\ KHT30 & 298–459 & 459–823 & - & - & 10.3 & 15.0 & - & - \\ \hline \end{tabular}
\end{table} 
Table 2: Quantification of mass loss events of all samples with ordered structures. From the isotherms, it can be observed that regardless of the modifications made during the synthesis procedure, all of the samples exhibited isotherms classified as type IV (a), characteristic of mesoporous materials with capillary condensation between 0.6 and 0.8 P/P\({}_{0}\), and a typical final saturation plateau [38]. As well, the referred capillary condensation was accompanied by H1 hysteresis loop. This hysteresis loop is characteristic of materials that show a cylindrical pores system [38]. Furthermore, it is relevant to highlight that all of the materials showed a very narrow hysteresis loops (between 0.6 and 0.75 P/P\({}_{0}\)), which indicates a pores system with high uniformity. The exception was the KAT18 sample that exhibited a small loss of verticality in the hysteresis, which can be attributed to a porous system with higher distribution rate of average pore sizes. Table 3 presents the textural properties of all samples with ordered structure. \begin{table}
\begin{tabular}{c c c c c} \hline
**Samples** & **S\({}_{\text{BET}}\)/m\({}^{2}\)-g\({}^{-1}\)** & **V\({}_{\text{Micro}}\)/cm\({}^{3}\)-g\({}^{-1}\)** & **V\({}_{\text{Meso}}\)/cm\({}^{3}\)-g\({}^{-1}\)** & **V\({}_{\text{T}}\)/cm\({}^{3}\)-g\({}^{-1}\)** \\ \hline KIT-6 & 603 & 0.02 & 0.68 & 0.76 \\ K0,012 & 465 & 0.01 & 0.55 & 0.70 \\ K0,022 & 572 & 0.01 & 0.63 & 0.72 \\ KDT2 & 573 & 0.03 & 0.65 & 0.71 \\ KDT4 & 562 & 0.01 & 0.68 & 0.73 \\ KDT8 & 636 & 0.02 & 0.72 & 0.87 \\ KMTt & 528 & 0.01 & 0.65 & 0.70 \\ KEt & 576 & 0.01 & 0.71 & 0.79 \\ KPr & 531 & 0.01 & 0.65 & 0.75 \\ KAT12 & 562 & 0.01 & 0.62 & 0.73 \\ KAT18 & 462 & 0.01 & 0.56 & 0.69 \\ KAT30 & 432 & 0.01 & 0.52 & 0.65 \\ KHT12 & 532 & 0.02 & 0.57 & 0.67 \\ KHT18 & 546 & 0.01 & 0.61 & 0.72 \\ KHT30 & 624 & 0.01 & 0.72 & 0.81 \\ \hline \end{tabular} \(S_{\text{BET}}\) = specific area; V\({}_{\text{T}}\) = total pore volume; V\({}_{\text{Meso}}\) = mesopores volume; V\({}_{\text{Micro}}\) = micropores volume.  
\end{table} 
Table 3: Textural properties of samples with ordered structures. Figure 5: N\({}_{2}\) adsorption and desorption isotherms of the (**A**) samples that presented cubic structures and (**B**) samples that presented hexagonal structures. The discussions of the textural properties were approached first for the parameters of specific area (S\({}_{\text{BET}}\)), microporous volume, mesoporous volume (V\({}_{\text{MESO}}\)) and total pore volume (V\({}_{\text{T}}\)), and later for the PSD, with the parameters average pore diameter and wall thickness (W\({}_{\text{T}}\)).