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Synthesis of ultrathin WSe2 nanosheets and their high- performance catalysis for conversion of amines to imines

Abstract

Tungsten diselenide (WSe2) is the material with the lowest thermal conductivity in the world. Most physical methods are used for the synthesis of tungsten diselenide. Here, a simple colloidal method is reported for the synthesis of WSe2 nanosheets. The composition, valence, size, morphology and properties of the samples were characterized and measured. Results showed that the obtained WSe2 nanosheets with the thickness of 0.7 nm had strong blue fluorescence. Significantly, the synthesized WSe2 nanosheets displayed excellent catalytic activity for the aerobic coupling of amines to imines, with 100% yield under visible light irradiation in air atmosphere. As a photocatalyst, it exhibited excellent recyclability, and maintained a high yield after 5 cycles. It was found that this reaction could also happen in the presence of natural light with slightly extending the reaction time. Moreover, H2O was used as solvent in catalytic process, avoiding expensive and toxic organic solvents. This work provides an efficient, economical and sustainable process for the synthesis of imines and shows the great potential of WSe2 nanosheets as photocatalyst of organic synthesis.

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Publication details

The article was received on 24 Jul 2018, accepted on 02 Oct 2018 and first published on 03 Oct 2018


Article type: Paper
DOI: 10.1039/C8NR05954C
Citation: Nanoscale, 2018, Accepted Manuscript
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    Synthesis of ultrathin WSe2 nanosheets and their high- performance catalysis for conversion of amines to imines

    B. Zhang, J. Chen, H. Niu, C. Mao and J. Song, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR05954C

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