عنوان
Synthesis of a novel catalyst based on Ag nanoparticles on mesoporous silica for reduction nitro aromatic compounds in aqueous solution
نویسنده (گان)
Ansari,Sara;Khorshidi,Alireza
چکیده مقاله
In the last decade, silver (Ag) nanoparticles have attracted extensive attention due to their catalytic properties for a variety of organic reactions [1]. Several investigations have been reported on preparation and catalytic activity of Ag NPs. However, metal-nanoparticle catalysts always encounter limitations, because of the problems associated with their separation from the products by traditional methods [2]. Nitroaromatic compounds are generally prepared via nitration of simple aromatic compounds and are extensively being used in various industries such as plastics, dyeing, agriculture, etc. As a result, nitroaromatic compounds are usually present in industrial effluents and agricultural waste water [3]. Hereby we report amine functionalized mesoporous magnetite nanoparticles as a robust support for uniform dispersion of Ag nanoparticles. Silver nanoparticles were formed on the surface of mesoporous silica via coordination of Ag+, followed by chemical reduction. The resulting Fe3O4@SiO2@KIT-Ag nanomaterial was characterized by powder x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM). Also, we use it as an effective catalyst in the reduction of a variety of nitroaromatic compounds.

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