Immobilization of a molybdenum-glycine Schiff base complex within the nanocages of zeolite Y with flexible ligand method

Abstract

Immobilization of a molybdenum-glycine Schiff base complex onto the supercages of zeolite Y was achieved through the flexible ligand method. The prepared material was characterized by different physicochemical techniques. FT-IR spectroscopy confirmed the immobilization of the complex onto the nanocages of zeolite Y. X-ray diffraction analysis revealed that textural properties of zeolite Y support were preserved during the immobilization process. Nitrogen adsorption-desorption analysis demonstrated the decrease in surface area of the prepared material in comparison with parent zeolite Y. Inductively coupled plasma optical emission spectroscopy showed the presence of 0.75 mmol g -1 molybdenum in the final material. The obtained material exhibited high catalytic activity, stability, and recyclability in the epoxidation of olefins with tert-butylhydroperoxide as oxidant.

Improvement of the Oxidative Desulfurization Performance Using MoO3/CuO‐Modified Hierarchical HY Zeolite

“…These results were approved with other characterization techniques (BET, DRS). Moreover, the catalyst's XRD pattern showed new peaks in the region of (2θ=23, 27, 34), which are related to the formation of CuO in alkaline media, followed by calcination [30,31] . Peaks in the regions of 2θ=32, 37 correspond to the presence of MoO 3 in the zeolite pores [32,33] .…”

“…Moreover, the catalyst's XRD pattern showed new peaks in the region of (2θ = 23, 27, 34), which are related to the formation of CuO in alkaline media, followed by calcination. [30,31] Peaks in the regions of 2θ = 32, 37 correspond to the presence of MoO 3 in the zeolite pores. [32,33] However, reflection in accordance with the hkl (220), (311), and (331) are related to the cation exchange locations.…”

Removal of Disperse Yellow-42 Dye by Catalytic Ozonation Using Iron and Manganese-Loaded Zeolites

“…Methylene blue and C. I. Acid Red 88 dye removal was investigated using CoFe 2 O 4 /mpg-C 3 N 4 under ultrasonic irradiation conditions and the UV/H 2 O 2 method [18], respectively.…”

Selective propylene epoxidation in liquid phase using highly dispersed Nb catalysts incorporated in mesoporous silicates

“…While the former is known for harsh reaction conditions, generation of significant toxic side-products and low production efficiency, the latter one has been extensively studied due to potentially high atomic efficiency and non-toxic by-product (H 2 O) formation. Up to date, intensive research efforts are still focused on noble metal based catalysts (Au [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], Ag [21][22][23][24][25][26] and Pd [27,28]) for direct oxidation by H 2 O 2 (or by H 2 -O 2 mixture [19,24]) in gaseous phase. The major issues, however, plaguing current metal-based catalytic processes include the use of expensive materials, poor catalyst durability and potential explosive risk induced by mixing of H 2 and O 2 .…”