2019-Sustainable Industrial Processing Summit
SIPS2019 Volume 1: Angell Intl. Symp. / Molten Salt, Ionic & Glass-forming Liquids: Processing and Sustainability

Editors:F. Kongoli, M. Gaune-Escard, J. Dupont, R. Fehrmann, A. Loidl, D. MacFarlane, R. Richert, M. Watanabe, L. Wondraczek, M. Yoshizawa-Fujita, Y. Yue
Publisher:Flogen Star OUTREACH
Publication Year:2019
Pages:177 pages
ISBN:978-1-989820-00-1
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
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    Luminescent and photocatalytically active carbon nitride nanocrystals dissolved in polar liquids

    Paul F McMillan1; Adam Clancy2; Christopher Howard2; Martin Wilding3;
    1UNIVERSITY COLLEGE LONDON, London, United Kingdom; 2UCL, London, United Kingdom; 3UNIV MANCHESTER, Didcot, United Kingdom;
    Type of Paper: Keynote
    Id Paper: 106
    Topic: 13

    Abstract:

    Layered carbon nitrides based on a polytriazine imide (PTI) sheet structure crystallize as 50-100 nm particles with hexagonal columnar morphology following synthesis from precursors such as dicyandiamide (DCDA) in molten salt (LiCl/KCl or LiBr/KBr eutectic) solutions [1,2]. When the crystals are exposed to aprotic polar liquids including DMSO, DMF and NMP as well as H2O they dissolve spontaneously forming few-layered crystalline 2D nanosheets in solution. The solutions are photoluminescent and photocatalytically active [3,4]. Following solvent evaporation the layered nanomaterials re-stack in a crystalline arrangement giving rise to a broad range of emission wavelengths extending throughout the visible range [3,5]. We will present new results for the dissolution process and the 2D nanoparticles in solution using high energy X-ray and neutron scattering techniques. We also discuss the glass forming ability of the solutions to provide few-layered crystalline nanoparticles with tunable photoluminescence properties held in a solid matrix.

    Keywords:

    Amides; Energy; Materials; Nanomaterials; Solidification; Solvation; Thermodynamic;

    References:

    [1] M.J. Bojdys et al, Chem Eur J 14 (2008) 8177
    [2] E. Wirnhier et al, Chem Eur J 17 (2011) 3213
    [3] T.S. Miller et al, Nano Letts 17 (2017) 5891
    [4] K. Schwinghammer et al J Am Chem Soc 136 (2014) 1730
    [5] T.M. Suter et al, Chem Sci 10 (2019) 2519

    Cite this article as:

    McMillan P, Clancy A, Howard C, Wilding M. (2019). Luminescent and photocatalytically active carbon nitride nanocrystals dissolved in polar liquids. In F. Kongoli, M. Gaune-Escard, J. Dupont, R. Fehrmann, A. Loidl, D. MacFarlane, R. Richert, M. Watanabe, L. Wondraczek, M. Yoshizawa-Fujita, Y. Yue (Eds.), Sustainable Industrial Processing Summit SIPS2019 Volume 1: Angell Intl. Symp. / Molten Salt, Ionic & Glass-forming Liquids: Processing and Sustainability (pp. 68-75). Montreal, Canada: FLOGEN Star Outreach