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Formation of uniform magnetic C@CoNi alloy hollow hybrid composites with excellent performance on catalysis and protein adsorption

Abstract

The metallic nickel or cobalt based composites with hollow nanostructures such as nanocages can serve as both advanced catalysts and protein adsorbent owing to their high surface area and increased active sites, and hence they have aroused great interest. Here, we report a facile route to synthesize hollow carbon spheres (HCS) embedded with bimetallic NiCo nanoparticles (NPs) with hollow structures by using NiCo hydroxide layered nanosheets functionalized carboxyl polystyrene spheres (CPS) as a template and polydopamine (PDA) as both carbon precursor and reductant. This unique hierarchical architecture, including meso-, and macropores, could provide a large specific surface area (244 m2•g-1) and efficient channel for the diffusion of small molecules and biomacromolecules (protein), greatly facilitating the excellent performance on the reduction of 4-nitrophenol and his-rich protein adsorption. Moreover, the size of surficial CoNi NPs can be facilely modulated via changing the calcination temperature, which can effectively control the catalytic and adsorption performance of the as-prepared nanocomposites. The as-prepared C@CoNi was employed as the catalyst to investigate the catalytic performance in the reduction of 4-nitrophenol (4-NP); furthermore, nickel nanoparticles decorated on the hollow microsphere display a strong affinity to His-rich proteins (BHb and BSA) via specific metal affinity force between polyhistidine groups and nickel nanoparticle.

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Publication details

The article was received on 15 Apr 2018, accepted on 18 May 2018 and first published on 18 May 2018


Article type: Paper
DOI: 10.1039/C8DT01480A
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Formation of uniform magnetic C@CoNi alloy hollow hybrid composites with excellent performance on catalysis and protein adsorption

    Y. Ling, M. Zhang, J. Zheng, J. Xu, T. Hayat and N. S. Alharbi, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C8DT01480A

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