期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 10, 期 6, 页码 1986-1993出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.1c07832
关键词
Carbon nitride; Base; Glucose; Fructose; Isomerization
资金
- National Natural Science Foundation of China [21878163, 51708301]
- China Postdoctoral Science Foundation [2018M640231]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Tianjin, China [17JCZDJC39500]
- National Key Research Project [2018YFD080083]
- Tianjin Research Innovation Project for Postgraduate Students [2019YJSB078]
- Science and Technology Demonstration Project of Industrial Integration and Development of Tianjin, China [17ZXYENC00100]
- Young Elite Scientists Sponsorship Program by Tianjin [TJSQNTJ-2018-06]
Alkali and alkaline-earth-metal-doped carbon nitride exhibit strong alkalinity and superior catalytic performance in the selective isomerization of glucose to fructose.
Bronsted base catalyzed isomerization of glucose toward fructose is on the rise due to the high value and versatility of fructose in biorefinery. Herein, we report the discovery of alkali and alkaline-earth-metal-doped carbon nitride (C3N4) as base catalysts for the selective isomerization of glucose to fructose. The characterizations proved that introducing a small quantity of alkali and alkaline-earth metals into C3N4 can remarkably improve the amount of strong basic sites. Among the tested materials, Mg doped C3N4 afforded an excellent fructose yield (>32%) and selectivity (>84%) from a high loading (10 wt %) of glucose in water at 80 degrees C with the lowest apparent activation energy (107 kJ mol(-1)), far exceeding that of the pristine C3N4 material. Although more efforts are required to improve the reusability, the proof of strong alkalinity and superior catalytic performance should greatly extend the applications of metal-doped C3N4 materials.
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