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      One-Pot Method for Multifunctional Yolk Structured Nanocomposites with N-doped Carbon Shell Using Polydopamine as Precursor

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      , , , ,
      Nanoscale Research Letters
      Springer US
      One-pot, N-doped, Yolk-shell

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          Abstract

          Herein, we reported a facile method to prepared uniform yolk like nanocomposites with well-defined N-doped carbon shell (C), in which the cores@SiO 2@polydopamine (Pdop) were used as the sacrificed template. Typically, inherited from the functional Au core, the yolk particles presented excellent catalytic activities.

          Electronic supplementary material

          The online version of this article (doi:10.1186/s11671-016-1425-6) contains supplementary material, which is available to authorized users.

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          Most cited references33

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          Facile Conjugation of Biomolecules onto Surfaces via Mussel Adhesive Protein Inspired Coatings.

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            Sp2 C-dominant N-doped carbon sub-micrometer spheres with a tunable size: a versatile platform for highly efficient oxygen-reduction catalysts.

            A simple, yet versatile strategy to prepare size-controlled and monodisperse carbon sub-micrometer spheres is developed based on the biomolecule dopamine. Unlike traditional carbon materials, the resulting carbon sub-micrometer spheres contain much less sp(3) carbon with high-level electroactive nitrogen. Moreover, metal-carbon hybrid sub-micrometer spheres can be easily obtained, and show highly promising catalytic properties in the oxygen-reduction reaction.
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              Yolk-shell nanocrystal@ZIF-8 nanostructures for gas-phase heterogeneous catalysis with selectivity control.

              A general synthetic strategy for yolk-shell nanocrystal@ZIF-8 nanostructures has been developed. The yolk-shell nanostructures possess the functions of nanoparticle cores, microporous shells, and a cavity in between, which offer great potential in heterogeneous catalysis. The synthetic strategy involved first coating the nanocrystal cores with a layer of Cu(2)O as the sacrificial template and then a layer of polycrystalline ZIF-8. The clean Cu(2)O surface assists in the formation of the ZIF-8 coating layer and is etched off spontaneously and simultaneously during this process. The yolk-shell nanostructures were characterized by transmission electron microscopy, scanning electron microscopy, X-ray diffraction, and nitrogen adsorption. To study the catalytic behavior, hydrogenations of ethylene, cyclohexene, and cyclooctene as model reactions were carried out over the Pd@ZIF-8 catalysts. The microporous ZIF-8 shell provides excellent molecular-size selectivity. The results show high activity for the ethylene and cyclohexene hydrogenations but not in the cyclooctene hydrogenation. Different activation energies for cyclohexene hydrogenation were obtained for nanostructures with and without the cavity in between the core and the shell. This demonstrates the importance of controlling the cavity because of its influence on the catalysis.
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                Author and article information

                Contributors
                suesywz1990@163.com
                zhangmin@sues.edu.cn
                dingleigcd@163.com
                ytwang2003@163.com
                xujingli@sues.edu.cn
                Journal
                Nanoscale Res Lett
                Nanoscale Res Lett
                Nanoscale Research Letters
                Springer US (New York )
                1931-7573
                1556-276X
                19 April 2016
                19 April 2016
                2016
                : 11
                : 212
                Affiliations
                College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, 201620 China
                Article
                1425
                10.1186/s11671-016-1425-6
                4837190
                27094826
                0fceee4b-0f22-4323-933f-7e724ee4521d
                © Zhang et al. 2016

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License ( http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

                History
                : 11 January 2016
                : 13 April 2016
                Categories
                Nano Express
                Custom metadata
                © The Author(s) 2016

                Nanomaterials
                one-pot,n-doped,yolk-shell
                Nanomaterials
                one-pot, n-doped, yolk-shell

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