Document Type : Original Article
Authors
1
Analytical Sciences Laboratory for Materials and Environment, University Larbi Ben M'Hidi, Oum El Bouaghi 04000, Algeria
2
Research Center in Industrial Technologies CRTI, P.O. Box 64, Cheraga, 16014 Algiers, Algeria.
3
Department of Process Engineering and Petrochemicals, Faculty of Technology, University of Echahid Hamma Lakhdar, P.O. Box: 789, El-Oued 39000, Algeria.
4
Izmir Institute of Technology, Chemical Engineering Department, Gülbahçe Yerleşkesi, Urla İzmir
5
School of Biotechnology,Badr University in Cairo(BUC), Badr City 11829, Cairo, Egypt
Abstract
Zeolites are essential materials in modern industries due to their uses as cation exchangers, selective adsorbents, and catalysts. In this study, we report novel procedures for producing zeolite T, which is distinguished by its round crystals that closely resemble Saharan flowers. An investigation was conducted on the hydrothermal synthesis of T zeolite in alkaline aqueous solutions without templates. Zeolite T crystals were synthesized via hydrothermal methods with clay-based aluminosilicate gel containing 1Al2O3, 25SiO2, 6.5Na2O, 2.25K2O, and 350 H2O. Zeolite crystals were formed at a temperature of 130°C, with crystallization durations of 3 and 5 days, respectively, using processed natural bentonite clay as the starting material. A range of analytical methods, such as XRD, FTIR, Raman, SEM, ATD-EDX, BET, ATG, and NH3-TPD, were used to observe the crystallization stages of zeolite T grains. During the synthesis of Zeolite T, samples were collected at various intervals, with the samples taken after three and five days of reaction being particularly noteworthy. The T1 zeolite is identified as a mixture of T2 zeolite and other impurities present in the reaction medium, indicating that T1 zeolite serves as a precursor phase to T2 zeolite (T1 is a germination phase). The analysis revealed that a treatment temperature of 130 °C for 5 days is optimal. The nucleation of zeolite T from treated bentonite commenced after 3 days. The results indicate that zeolite T2, composed of uniform crystalline grains formed over 5 days, yields a mesoporous structure with a size of 1.35 µm and a molar ratio of 1.78 between molar quantities of silica and aluminum of this zeolite (T Zeolite). An analysis of the BET (surface area) revealed a value of 95.75 m²g-1, accompanied by a pore volume of 0.010 cm³g-1. Moreover, the examination of TPD-NH3 desorption revealed a restricted occurrence of the acidic site of Brønsted, while a significant number of acidic sites of Lewis were detected. The obtained crystalline zeolite T was examined for its ability to catalyze the Hantzsch reaction. In addition, T2 zeolite prepared was used as a catalyst in the synthesis of the 1,1'-(4-(5-bromo-2-thiophenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-diyl)bis(ethan-1-one) (BTDDB) due to the acidity sites (Lewis and Brønsted acid) in the structure of the zeolite. The result of the reaction has shown a good percentage in the synthetic of BTDDB The results of FTIR, UV, 13C NMR, and 1H NMR spectrum analyses revealed that the structure of the 1,4-dihydropyridine compound was well-defined, and the use of molecular docking and density functional theory (DFT) analysis revealed better performance in the inhibition of the macromolecular targets aminodeoxyfutalosine nucleosidase and DNA gyrase subunit B
Keywords
Main Subjects
)
View on SCiNiTO