Synthesis of ETS-۱۰ and its modification

The objective of this study is to synthesize ETS-۱۰ and modify its surface area, pore volume,and pore size. ETS-۱۰ adsorbent, with a Si/Ti ratio of ۵.۵, was synthesized without seeds using thehydrothermal method[۱]. To modify ETS-۱۰, organic templates such as tetrapropylammoniumbromide and P۱۲۳, as well as a specific weight percentage of isopropanol as a solvent, were used.ETS-۱۰(Na, K) was synthesized using hydrothermal methods as previously reported. The final gelcomposition was ۳.۵Na۲O:۱.۵K۲O:TiO۲:۵.۵ SiO۲:۱۳۱ H۲O [۱]. During the synthesis of ETS-۱۰,sodium silicate and deionized water were mixed, and then sodium hydroxide and potassiumchloride were added to the mixture. After achieving a homogeneous mixture, titanium trichloridewas added, and the pH level was set to ۱۰-۱۱. The resulting gel was then transferred to a Teflonlinedautoclave and heated at ۲۳۰°C for ۶۰ hours. Finally, the ETS-۱۰ powder obtained waswashed and dried for ۲۴ hours at ۱۱۰°C. In comparison to the ETS-۱۰ synthesis, the synthesis ofETS۱۰ (۱۰ wt% isopropanol) and ETS-۱۰ (۲۰ wt% isopropanol) involved substituting ۱۰ wt% and۲۰ wt% of deionized water, respectively, with isopropanol solvent in the first step of the synthesis.The synthesized adsorbents were named ETS۱۰ (۱۰ wt% isopropanol) and ETS-۱۰ (۲۰ wt%isopropanol). The synthesis of organic templates followed the same procedure as the ETS-۱۰synthesis: after adding sodium hydroxide and potassium chloride, organic templates such asTPABr and P۱۲۳ were added to the mixture. The resulting mixture was dried and then calcined[۲]. XRD, SEM and BET analysis were used to identify the synthesized compounds.

Keywords:

Synthesize , Titanosilicat , ETS-۱۰ , Hydrothermal method