مشخصات پژوهش

عنوان	Preparation of Core/Shell CaO@SiO2-SO3H as a Novel and Recyclable Nanocatalyst for One-Pot Synthesize of Dihydropyrano[2,3-c] Pyrazoles and Tetrahydrobenzo[b]Pyrans
نوع پژوهش	مقاله چاپ‌شده
کلیدواژه‌ها	Green chemistry . Eggshell . Sulfonic acid . Core/shell .Dihydropyrano[2, 3-c]pyrazoles . Tetrahydrobenzo[b]pyrans
چکیده	The core/shell CaO@SiO2-SO3H nanoparticles were prepared by stabilizing of sulfonic acid on the surface of silica-coated CaO nanoparticles. The structure of CaO@SiO2-SO3H was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), wavelength-dispersive X-ray spectroscopy (WDX) and thermal gravimetric analysis (TGA). CaO@SiO2-SO3H was used as a new acidic catalyst for green synthesis of dihydropyrano[2,3-c]pyrazoles and tetrahydrobenzo[b]pyrans via one-pot three-component reactions with good to excellent yields. This catalyst could be recycled and reused for six runs without significant loose of activity.
پژوهشگران	محمد علی بداغی فرد (نفر سوم)، اکبر مبینی خالدی (نفر دوم)، فاطمه سامری (نفر اول)