کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
65166 | 48384 | 2014 | 6 صفحه PDF | دانلود رایگان |
• ZIF-68 with exceptional stability was firstly synthesized by hydrothermal method.
• ZIF-68 was firstly used to catalyze the cyclic addition reaction of CO2.
• High yield of cyclic carbonate was obtained under mild conditions.
• The presence of acid–base site in ZIF-68 plays a critical role in the reaction.
An efficient heterogeneous catalyst, namely, zeolitic imidazolate framework-68 (ZIF-68), was developed for the synthesis of cyclic carbonate from CO2 and styrene oxide in the absence of any solvents or co-catalysts under mild reaction conditions (120 °C and 1.00 MPa). The textural properties of the ZIF-68 catalyst were determined by the powder X-ray diffraction, N2 adsorption–desorption and thermal analysis. The acid–base property of ZIF-68 catalyst was investigated by NH3 and CO2 temperature-programmed desorption methods. The results indicate that the yield of cyclic carbonate reached up to 93.3% after 12 h in the mild reaction conditions. Moreover, the ZIF-68 catalyst could be successfully reused for three times without any significant loss in catalytic activity.
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Journal: Journal of Molecular Catalysis A: Chemical - Volume 392, October 2014, Pages 278–283