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Title
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A novel ternary GO@SiO2-HPW nanocomposite as an efficient heterogeneous catalyst for the synthesis of benzazoles in aqueous media
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Type
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JournalPaper
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Keywords
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benzimidazole, benzothiozole, graphene oxide, heterogeneous catalyst, heteropoly acid
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Abstract
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A new solid acid catalyst, consisting of 12-phosphotungstic heteropoly acid (HPW) supported on graphene oxide/silica nanocomposite (GO@SiO2), has been developed via immobilizing HPW onto an amine-functionalized GO/SiO2 surface through coordination interaction (GO@SiO2-HPW). The GO@SiO2-HPW nanocomposite was characterized by Fourier transform infrared (FT-IR) spectroscopy, thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and powder X-ray diffraction (XRD). The prepared nanocomposite could be dispersed homogeneously in water and further used as a heterogeneous, reusable, and efficient catalyst for the synthesis of benzimidazoles and benzothiazoles by the reaction of 1,2-phenelynediamine or 2-aminothiophenol with different aldehydes.
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Researchers
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ehsan alaee (Fifth Researcher), nasim amiri andi (Fourth Researcher), Ghasem Firouzzade Pasha (Second Researcher), setareh habibzadeh (First Researcher), mahmood tajbakhsh (Third Researcher)
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