Journal
CATALYSIS SCIENCE & TECHNOLOGY
Volume 8, Issue 21, Pages 5582-5593Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cy01688g
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Funding
- PetroChina Innovation Foundation [2018D-5007-0508]
- Advanced Catalysis and Green Manufacturing Collaborative Innovation Centre [ACGM2016-06-28]
- Foundation of the State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering [2017-K28]
- Foundation of the State Key Laboratory of Chemical Resource Engineering [CRE-2017-C-109]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions [PPZY2015B145]
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Chemical fixation of CO2 to high-valued chemicals is currently a significant research topic in both the environment and chemistry, and cycloaddition of CO2 with epoxides is regarded as a sustainable route for the manufacture of cyclic carbonates. Homogeneous catalysts including ionic liquids and organic metal complexes suffer from difficulty in catalyst-product separation despite their excellent catalytic activities. In this work, we utilized graphitic carbon nitride (g-C3N4) as a novel support to immobilize zinc halides (ZnX2) through a simple preparation method. Based on the detailed design of the synthesis of ZnX2/g-C3N4, the chemical bonding information of ZnX2 on g-C3N4 was comprehensively investigated by XPS and FT-IR techniques. In addition to activation of CO2, g-C3N4 can anchor zinc halides via interaction between zinc and nitrogen, thereby effectively alleviating potential leaching of zinc halides. As heterogeneous catalysts, ZnX2/g-C3N4 materials showed good catalytic activities in the cycloaddition reactions of CO2 with propylene oxide. Furthermore, a wide range of epoxides can be converted to the corresponding cyclic carbonate with good selectivities (>93%) and moderate conversions (50-88%).
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