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چکیده
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KIT-6 is a relatively new structure of mesoporous silica with thick expanded walls, thermal stable, open porosity and very accessible to guest species and metal complexes. Mesoporous KIT-6 exhibited wide range of application in various fields including catalysis, ion exchange, surface adsorption, and fabrication of applicable materials [1]. KIT-6 has symmetrical three-dimensional cubic structure with a network of intrusive channels, which make a lot of vacant space to accept guest species [2]. Therefore, due to the mentioned unique properties of mesoporous KIT-6, it can be used as a substrate for the synthesis of heterogeneous catalysts. In the present work, mesoporous KIT-6 were synthesized by pluronic surfactant P123 as a structure-guiding agent and conventional butanol as an auxiliary solvent in an acidic environment. The synthesized KIT-6 was then modified by 3-chloropropyltrimethoxysilane (CPTMS) and finally, a Schiff base complex of nickel was fixed on the modified mesoporous KIT-6 (Ni-Schiff base@KIT-6). The obtained catalyst was identified by IR, BET, XRD, EDS, SEM and TGA methods and was investigated in the selective oxidation of sulfide and synthesis of various tetrazole derivatives. All products were obtained with high purity which indicates the high catalytic activity of this catalyst.
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