期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 9, 期 6, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.106452
关键词
Carbon/silica core-shell material; Multiple active sites; CO2 cycloaddition; Cyclic carbonate
资金
- Key Projects of Social Science and Technology Development of Dongguan [20185071401607, 2019507140211]
- National Natural Science Foundation of China [21606045]
- Scientific Research Youth Team of Dongguan Univer-sity of Technology [TDQN2019006]
- Characteristic Innovation Project of Guangdong Provincial Department of Education [2021KTSCX133]
The M-41/CN catalyst showed synergistic effects of Si-OH groups (acid sites) and pyridinic N species (Lewis basic sites), along with a porous structure with specific surface area reaching 308.7 m(2)/g. It exhibited excellent catalytic activity and stability for the cycloaddition of CO2 with epichlorohydrin, with conversion of epichlorohydrin >98% after 4th reuse.
Developing heterogeneous catalyst with multiple active sites has been a hot-spot for cycloaddition of CO2 with epoxides to value-added chemicals. In this work, a new N- doped carbon/silica core-shell material (M-41/CN) with special hydroxy (Si-OH) and pyridinic N active sites were designed and synthesized. The prepared M-41/CN showed good features: (1) exhibited synergistic effects of Si-OH groups (Acid sites) and pyridinic N species (Lewis basic sites), and (2) held porous structure with specific surface area reaching 308.7 m(2)/g. The M-41/CN exhibited excellent catalytic activity and stability for cycloaddition of CO2 with epichlorohydrin, with conversion of epichlorohydrin >98% after 4th reuse. Hence, the M-41/CN with acid-base duality offers a new choice for preparing low-cost, environment-friendly and high-efficiency catalysts for CO2 conversion.
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