Visible-light-driven oxidative coupling of primary amines with high selectivity in air over Ni/Ce-doped defective carbon nitride

Visible-light-driven photocatalysis is a sustainable, low-cost, and stable, method for chemical conversion in organic processes. A novel porous g-C 3 N 4 nanosheet (CN) photocatalytic material co-doped with nickel and cerium has been synthesized using a one-step thermal polymerization method. We use...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2024-04, Vol.35 (10), p.675, Article 675
Main Authors: Zhou, Xian-De, Tian, Yong-Hui
Format: Article
Language:English
Subjects:
Amines
Bimetals
Carbon nitride
Catalysts
Catalytic activity
Catalytic converters
Cerium
Characterization and Evaluation of Materials
Charge efficiency
Charge transfer
Chemical synthesis
Chemistry and Materials Science
Light irradiation
Materials Science
Nanosheets
Optical and Electronic Materials
Oxidation
Photocatalysis
Photoelectric effect
Substrates
Trapping
X ray photoelectron spectroscopy
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Summary:Visible-light-driven photocatalysis is a sustainable, low-cost, and stable, method for chemical conversion in organic processes. A novel porous g-C 3 N 4 nanosheet (CN) photocatalytic material co-doped with nickel and cerium has been synthesized using a one-step thermal polymerization method. We used XPS, XRD, EPR, UV–vis DRS, SEM, and PL to disclose the structural, optical, and electrical features of the catalysts. Experiments with EPR radical trapping confirmed the existence of reactive oxygen species and holes in the photocatalytic activity. The charge transfer and separation efficiency of the produced catalysts were evaluated using EIS and photocurrent measurements. Ni/Ce-doped CN nanosheets showed improved photocatalytic activities under visible light irradiation, with NiCe-CN showing the best performance with 98% conversion after 2.5 h, and product selectivity exceeding 99% in light-driven amine-imine oxidation reactions. Radical trapping experiments reveal the importance of generating h + , 1 O 2 , and · O 2 - for photocatalytic conversion of substrates, with relevant catalytic mechanisms presented. This study provides a crucial reference for designing and synthesizing novel bimetallic co-doped g-C 3 N 4 photocatalytic materials to enhance photocatalytic organic synthesis reactions.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-024-12416-8