Preparation, Characterization and Catalytic Activity Study of Anderson-Type Heteropolymolybdates Supported on Different Zeolite Structures

Mohamad Sayed Thabet

doi:7410198

Polyoxometalate catalysts with different divalent ions (Mⁿ⁺ = Ni²⁺, Zn²⁺) were prepared by incipient witness impregnation method and supported on different zeolites namely, NaY, ZSM-5 and Mordenite. The catalyst samples were characterized using different tools such as XRD, FTIR, and BET texture. The crystalline structure of zeolite accompanied by an increase in particle size can be established using XRD data. These new phases caused pore widening of the employed zeolites, a decrease of surface area and other changes of the surface texture. The interaction of polyoxomolybdate with the zeolite structure confirmed by physical changes. The surface area was minimal in the catalysts supported on NaY zeolite. The assessment of the catalytic activity was performed by the use of the photocatalytic degradation of direct blue 1 dye (DB 1) as a probe reaction in presence of H₂O₂ as an oxidant. It has been found that the catalytic activity of Mⁿ⁺Mo-ZSM5 is higher than that of Mⁿ⁺Mo-Y or Mⁿ⁺Mo-Mordenite.

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