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Facile synthesis of ultrathin two-dimensional nanosheets-constructed MCo2O4 (M = Ni, Cu, Zn) nanotubes for efficient photocatalytic oxygen evolution

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Abstract

Hierarchical nanosheets-assembled nanotubes are of great interest for their unique physicochemical properties as well as their potential applications in a variety of fields. However, the synthesis of hierarchical mixed transition-metal oxides-based nanosheets-assembled nanotubes for highly efficient photocatalytic oxygen evolution is rarely reported. Herein, a simple and versatile approach was developed to synthesize hierarchical nanosheets-constructed MCo2O4 (M = Ni, Cu, Zn) nanotubes. Core–shell polyacrylonitrile (PAN)/M-cobalt hydroxide ultrathin nanosheet composite nanofibers were first synthesized by hydroxylation reaction between PAN/M-cobalt acetate hydroxide precursors and NaBH4. After calcination, these nanofibers as precursors were easily transformed into the corresponding hierarchical nanosheets-constructed MCo2O4 nanotubes. By applying a photocatalyst, the resultant MCo2O4 nanotubes, particularly the CuCo2O4 nanotubes, exhibited high photocatalytic activity and cycle stability toward water oxidation reaction with O2 generation rates of 51.1 mmol g−1 h−1 under visible light irradiation, which is higher than most reported catalysts. This approach is very versatile and can be applied to synthesize other hierarchical multi-element oxides-based nanosheets-constructed nanotubes for advanced applications.

Graphical abstract: Facile synthesis of ultrathin two-dimensional nanosheets-constructed MCo2O4 (M = Ni, Cu, Zn) nanotubes for efficient photocatalytic oxygen evolution

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Publication details

The article was received on 13 Dec 2017, accepted on 23 Jan 2018 and first published on 24 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR09290C
Citation: Nanoscale, 2018, Advance Article
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    Facile synthesis of ultrathin two-dimensional nanosheets-constructed MCo2O4 (M = Ni, Cu, Zn) nanotubes for efficient photocatalytic oxygen evolution

    E. Ding, A. Li, H. Liu, W. Liu, F. Chen, T. Li and B. Wang, Nanoscale, 2018, Advance Article , DOI: 10.1039/C7NR09290C

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