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First Blue Fluorescence Composite Film Based on Graphitic Carbon Nitride Nanosheets/Polyoxometalate for Application in Reversible Electroluminescent Switching

Abstract

In this work, for the first time we constructed a multifunctional blue-fluorescent composite film based on the photoluminescent protonated graphitic carbon nitride nanosheets (g-C3N4NS) and the reversible electrochromic silicomolybdotungstate K8(SiMoW10O39)•13H2O (SiMoW) by the layer-by-layer (LBL) assembly method. Firstly, SiMoW and g-C3N4NS were synthesized, and their structure, morphology and property were verified by FTIR (Fourier Transform Infrared Spectroscopy), SEM (Scanning Electron Microscope), CV (Cyclic Voltammetry) and fluorescence spectroscopy. Then, the composite films containing SiMoW and g-C3N4NS were assembled, and their assembly process, morphology, composition and property were characterized by the means of UV-vis absorption spectroscopy, CV, amperometric and fluorescence spectroscopy, XPS (X-ray Photoelectron Spectroscopy) and AFM (Atomic Force Microscopy). Finaly, the reversible electrofluorochromic property of the composite film [(PEI/SiMoW)25/(g-C3N4NS/SiMoW)3/(PEI/SiMoW)2] was investigated by in situ spectroelectrochemical system based on the fluorescence resonance energy transfer mechanism. The results show good blue-fluorescent switching performance, stability and reversibility of this composite film. This is the first demonstration of POM control of blue luminescence switch.

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Supplementary files

Publication details

The article was received on 25 Dec 2018, accepted on 12 Feb 2019 and first published on 12 Feb 2019


Article type: Paper
DOI: 10.1039/C8TC06539J
Citation: J. Mater. Chem. C, 2019, Accepted Manuscript

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    First Blue Fluorescence Composite Film Based on Graphitic Carbon Nitride Nanosheets/Polyoxometalate for Application in Reversible Electroluminescent Switching

    Z. Fu, Z. Ma, Y. Tian and L. Bi, J. Mater. Chem. C, 2019, Accepted Manuscript , DOI: 10.1039/C8TC06539J

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