Fast and versatile electrodeposition of vertically aligned layered rare-earth hydroxide nanosheets for multicolour luminescence and oil/water separation

Xiaoli Wu; Yongping Guo; Ji-Guang Li; Yuanli Liu

doi:10.1039/D3TC04685K

論文 Fast and versatile electrodeposition of vertically aligned layered rare-earth hydroxide nanosheets for multicolour luminescence and oil/water separation

Xiaoli Wu (Guilin University of Technology) ; Yongping Guo (Guilin University of Technology) ; Ji-Guang Li (Research Center for Electronic and Optical Materials/Optical Materials Field/Polycrystalline Optical Material Group, National Institute for Materials Science) ; Yuanli Liu (Guilin University of Technology)

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Xiaoli Wu, Yongping Guo, Ji-Guang Li, Yuanli Liu. Fast and versatile electrodeposition of vertically aligned layered rare-earth hydroxide nanosheets for multicolour luminescence and oil/water separation. Journal of Materials Chemistry C. 2024, 12 (9), 3116-3123. https://doi.org/10.1039/D3TC04685K

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(abstract)

The construction of multifunctional films using layered rare-earth hydroxide (LREH) nanosheets as building blocks is a subject of topical interest, where the traditional technique involves four major steps: bulk crystal synthesis, intercalation of long-chain organic anions, exfoliation of the bulk crystals into nanosheets, and layer-by-layer deposition of the nanosheets into films. We originally established herein an electrodeposition technique that allows for one-step film construction in only 10 minutes and for a wide range of RE elements (RE = La–Ho lanthanides and Y, excluding Ce). Distinctly different from the [001] oriented LREH films made via the traditional technique, the LREH nanosheets were significantly aligned vertically to the substrate surface and showed super-hydrophobicity. With the LYH for example, high efficiency of oil/water separation was achieved with the film grown on a nickel mesh, and the similarly structured oxide films transformed from the Eu3+, Tb3+ and Eu3+/Tb3+ doped LYH films, grown on ITO glass, showed multi-color luminescence (green, orange, and red), long luminescence lifetimes and high quantum efficiency. This study provided a new concept for the design and fabrication of multifunctional LREH materials, which might help broaden the application of LREHs.

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