4.7 Article

Covalent organic framework stabilized CdS nanoparticles as efficient visible-light-driven photocatalysts for selective oxidation of aromatic alcohols

期刊

CHINESE CHEMICAL LETTERS
卷 32, 期 7, 页码 2207-2211

出版社

ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.12.021

关键词

Covalent organic frameworks; CdS nanoparticles; Photocatalyst; Selective alcohol oxidation; Visible light; Green organic synthesis

资金

  1. National Natural Science Foundation of China [51802015]
  2. National Key Research and Development Program of China [2018YFB0605900]
  3. Fundamental Research Funds for the Central Universities [FRF-TP-20-005A3]
  4. Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities) [FRF-IDRY-19-020]

向作者/读者索取更多资源

In this study, CdS nanoparticles were successfully deposited on COFs surface, leading to high catalytic activity for oxidation of aromatic alcohols. By enhancing the interaction between CdS and COF, the photocatalytic performance was improved significantly.
Noble-metal-free photocatalysts with high and stable performance provide an environmentally-friendly and cost-efficient route for green organic synthesis. In this work, CdS nanoparticles with small particle size and different amount were successfully deposited on the surface of covalent organic frameworks (COFs). The deposition of suitable content of CdS on COFs could not only modify the light adsorption ability and the intrinsic electronic properties, but also enhance the photocatalytic activity and cycling performance of CdS for the selective oxidation of aromatic alcohols under visible light. Especially, COF/CdS-3 exhibited the highest yield (97.1%) of benzaldehyde which is approximately 2.5 and 15.9 times as that of parental CdS and COF, respectively. The results show that the combination of CdS and COF can improve the utilization of visible light and the separation of photo-generated charge carriers, and COF with the pi-conjugated system as supports for CdS nanoparticles could provide efficient electron transport channels and improve the photocatalytic performance. Therefore, this kind of COF-supported photocatalysts with accelerated photo-induced electrons and charge-carrier separation between semiconductors possesses great potentials in future green organic synthesis. (C) 2021 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.

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