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Naked Au nanoparticles monodispersed onto multifunctional cellulose nanocrystals-graphene hybrid Sheets:towards efficient and sustainable heterogeneous catalysts

Abstract

A simple, clean, and efficient synthesis method has been developed for deposition of ∼3 nm monodisperse “naked” gold nanoparticles (Au NPs) onto cellulose nanocrystals-graphene (CNC-G) hybrid sheets without the use of additional reducing and capping agents. The as-prepared catalysts (Au@CNC-G) were examined using FT-IR spectroscopy, thermogravimetric analysis (TGA), atomic force microscopy, electron microscopy, wide-angle X-ray diffraction, and X-ray photoelectron spectroscopy (XPS). After some optimization, the Au@CNC-G catalyst exhibited robust catalytic activity, impressive stability, and good flexibility for “one-pot” reaction of an alkyne, an amine, and an aldehyde (A3-coupling) in water. The catalytic activity of the Au@CNC-G catalyst could be attributed to a synergestic effect derived from the coexistence of CNC and graphene. The Au3+ ions could be in situ reduced to create fine Au NPs and simultaneously anchored on the surface of CNC-G hybrid sheets through coordination, leading to uniform dispersion of Au NPs. Moreover, the Au@CNC-G catalyst could be conveniently recycled and reused for many times, thus lowering the cost and minimizing the environmental pollutions caused by organic solvents and heavy metallic ions.

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Publication details

The article was received on 05 Oct 2017, accepted on 13 Dec 2017 and first published on 22 Dec 2017


Article type: Paper
DOI: 10.1039/C7NJ03798H
Citation: New J. Chem., 2017, Accepted Manuscript
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    Naked Au nanoparticles monodispersed onto multifunctional cellulose nanocrystals-graphene hybrid Sheets:towards efficient and sustainable heterogeneous catalysts

    Y. Wang, H. Zhang, X. Lin, S. Chen, Z. Jiang, J. Wang, J. Huang, F. Zhang and H. Li, New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ03798H

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