SALAMA, T. (2007). SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS. Al-Azhar Bulletin of Science, 18(Issue 2-A), 203-220. doi: 10.21608/absb.2007.11143
TAREK M. SALAMA. "SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS". Al-Azhar Bulletin of Science, 18, Issue 2-A, 2007, 203-220. doi: 10.21608/absb.2007.11143
SALAMA, T. (2007). 'SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS', Al-Azhar Bulletin of Science, 18(Issue 2-A), pp. 203-220. doi: 10.21608/absb.2007.11143
SALAMA, T. SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS. Al-Azhar Bulletin of Science, 2007; 18(Issue 2-A): 203-220. doi: 10.21608/absb.2007.11143
SYNTHESIS AND PHYSICOCHEMICAL CHARACTERIZATION OF ZSM-5 METALLOSILICATE ZEOLITES PREPARED BY ISOMORPHOUS SUBSTITUTION PROCESS
Faculty of Science, Chemistry Department, Al-Azhar University, Nasr City 11884, Cairo, Egypt.
Abstract
Metal ions-containing ZSM-5 materials were prepared by isomrphous substitution of purely ZSM-5 using different metal ions, namely Co(II), Ni(II) and Cu(II). The metal modified ZSM-5 samples were synthesized hydrothermally in the presence of tetrapropyl ammonium bromide (TPABr) as the template and n-propyl amine (n-PrNH2) as the mobilizing agent. The structure, morphology, particle-size distribution, surface texture and acidity of these materials have been investigated and compared with ZSM-5 prepared by direct hydrothermal synthesis. The apparent effect of the substitution of Al by Co(II) ions on the crystal size results in a structural arrangement of the gel during aging-favoring nucleation.Thesurfacearea, degree of crystallinity and particle size of Co/ZSM-5 increase at the expense of pore radius, though Ni(II) and Cu(II) ions substituted ZSM-5 cause lesser effects. The M/ZSM-5 catalyst in the presence H2O2/UV is an active system for the oxidative color removal of Direct blue-1 in aqueous heterogeneous suspensions with a very low M(II)/substrate ratio. The high phase heterogeneity of Co/ZSM-5 catalyst account for the increased values of the activity than the corresponding Ni/ and Cu/ZSM-5 ones.
Top