期刊
JOURNAL OF CATALYSIS
卷 407, 期 -, 页码 65-76出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2022.01.016
关键词
CO2 cycloaddition; Photothermal conversion efficiency; Zn and N co-doped porous carbon; Photothermal catalysis; Heterogeneous catalysis
资金
- National Natural Science Foundation of China [22068023, 21766016, 52163003]
- Yunnan Ten Thousand Talents Plan Young & Elite Talents Project [YNWR-QNBJ-2018-198]
- Kunming Science and Technology Planning Project [2019-1-G-25318000003480, 2019-1-A-24657]
- Youth Project of Basic Research Program of Yunnan Province [202001AU070023]
- National Training Program of Un-dergraduate Innovation and Entrepreneurship in Yunnan
- Talent Reserve Pro-ject in Yunnan
- Academician workstation
- [201910674032]
- [2015HB014]
- [2019IC002]
Solar energy is considered the cleanest, cheapest, and most sustainable energy source. By using Zn and N co-doped porous carbon nanosheets as catalysts and photothermal materials, the cycloaddition of CO2 can be driven efficiently with high yields. This approach offers recycling capability and exhibits high activity towards other epoxides.
Solar energy is considered as the cleanest, cheapest, and most sustainable energy source, and CO2 cycloaddition that is drove by solar energy has unique advantages in the aspect of energy and environmental. Therefore, Zn and N co-doped porous carbon nanosheets (ZNCs), which were synthesized by a simple one-step pyrolysis method, as catalysts and photothermal material to photothermally drive cycloaddition of CO2. The prepared ZNCs show graphene-like layered structure, uniformly distributed Lewis acid (Zn atoms) sites and Lewis base (N atoms) sites, full spectrum absorption and high photothermal conversion efficiency. More importantly, ZNCs have a higher catalytic efficiency than traditional heating methods because it can be quickly in-situ heated by light, hence the yield of cyclic carbonate reached 91.1% (0.1 MPa CO2, 1000 mW.cm(-2) full-spectrum irradiation, 12 h). ZNCs were recycled five times without significant reduction in catalytic efficiency, and have high activity to other series of epoxides. A possible CO2 cycloaddition mechanism which is catalyzed by ZNCs is proposed, including the step of adsorption, ring opening, insertion and cyclic carbonates formation. (c) 2022 Elsevier Inc. All rights reserved.
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