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Hierarchical flower-like Ni-Co layered double hydroxide nanostructures: synthesis and super performance

Abstract

Three-dimensional hierarchical flower-like Ni-Co layered double hydroxides (LDHs) nanostructures composed of porous nanosheets were prepared by Ni-Co precursors using optimized preparation conditions towards the applications of energy storage and adsorption. The Ni-Co LDHs were formed via an olation reaction and subsequent growth to nanosheet structures. It is found that suitable Ni/Co ratios for precursors resulted in the Ni-Co LDHs with large specific surface area, porous structure and expanded interlayer spacing, which contributed to the improvement performance for electrochemistry and anionic dye adsorption. In the case of a Ni/Co molar ratio of 1, the Ni-Co LDHs as sorbent for removing anionic dyes (acid fuchsin and Congo red) in water revealed a high adsorption rate, large adsorption capacity and well recycling performance. Using a molar ratio of Ni/Co of 0.5, the specific capacitance of as-prepared electrode reached to 3168.3 F g-1 at current density of 1 A g-1 and a large capacitance retention of 90.5 % after 3000 cycles athigh current density. The Ni-Co LDHs possess enormous application potentials as a multifunctional material for supercapacitor and dye adsorption

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Publication details

The article was received on 02 Sep 2018, accepted on 25 Sep 2018 and first published on 26 Sep 2018


Article type: Research Article
DOI: 10.1039/C8QI00931G
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Hierarchical flower-like Ni-Co layered double hydroxide nanostructures: synthesis and super performance

    T. Dong, X. Zhang, M. Li, P. Wang and P. Yang, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00931G

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