Síntese de MCM-41 e SBA-15 com grupamentos amino-propila trocados com metais de transição para reações de oxidação: Seropédica, RJ.

Abstract

In this study the grafing of aminopropyl and ethileneaminopropyl groups was made over two types or mesoporous silica materials, the MCM-41 and SBA-15. The MCM-41 sample was obtained at alcaline midia from amourphous silica (Degussa Aerosil 200). The SBA-15 sample was made at acid media from tetrathoxysilane and the block copolymer polyethyleneglycol- polypropyleneglycol – polyethyleneglycol (EO20PO70EO20) as template. In order the graft the aminopropyl groups a reaction of the mesoporous materials with 3-aminopropyltriethoxysilane was carried out. A reaction of the MCM-41 and SBA-15 with N-[3-trimethoxysilylpropyl] – ethylene diamine. The grafted materials were trated with solutions of trasition metal cations (Co3+, Fe3+ and Ni3+) in order to coordenate with the amino groups. Amino at generating catalytic ative centers for oxidation. The obtained samples were characterized by X-ray difracion, N2 adsorption and Fourier Transformed Infrared Spectroscopy