کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
65034 | 48379 | 2015 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Metal halides supported on mesoporous carbon nitride as efficient heterogeneous catalysts for the cycloaddition of CO2 Metal halides supported on mesoporous carbon nitride as efficient heterogeneous catalysts for the cycloaddition of CO2](/preview/png/65034.png)
• Metal halides were supported on mp-C3N4 supports via simple impregnation methods.
• Metal halide was essentially active sites to activate propylene oxide molecule.
• Various supported metal halides showed high performances in cycloaddition of CO2.
A series of ZnCl2/mp-C3N4 catalysts were prepared through a wet impregnation method using mesoporous g-C3N4 materials as catalytic supports. The physicochemical properties of the ZnCl2/mp-C3N4 catalysts were characterized using several techniques, including N2 adsorption–desorption, X-ray diffraction, Fourier transform infrared, UV–vis diffuse reflectance, and X-ray photoelectron spectroscopy. In the cycloaddition reactions of CO2 with propylene oxide (PO) to propylene carbonate (PC), the ZnCl2/mp-C3N4 materials revealed high catalytic performances at 140 °C and 6 h. Furthermore, other metal halides including ZnBr2, CoCl2, FeCl3, NiCl2, and MgCl2 catalysts supported on mp-C3N4 were fabricated and the synthesized catalysts also demonstrated high performances in the catalytic cycloaddition of CO2. A possible catalytic mechanism has been proposed. The mp-C3N4 material served mainly as a basic support to adsorb CO2 whereas the supported metal halides were active sites to promote the activation of PO and realize its transform into PC.
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Journal: Journal of Molecular Catalysis A: Chemical - Volume 403, July 2015, Pages 77–83