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Issue 18, 2015
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One-pot synthesis of an Au/Au2S viologen hybrid nanocomposite for efficient catalytic applications

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Abstract

We report a facile one-pot synthesis of Au/Au2S multicomponent nanoparticles supported on viologen (V) as a hybrid nanocomposite. Sodium dithionite was used as the reducing agent for both Au and V precursors and SDS as the stabilizing agent for Au nanoparticles in aqueous reaction medium. Spectroscopy, microscopy and electrochemical measurements confirm the successful composite formation. The as-prepared flower-like composite showed excellent catalytic properties towards the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). The catalytic activity factor of the Au/Au2S–V hybrid was highest in comparison to those reported for polymer supported Au nanoparticle catalysts. The enhanced catalytic performance can be attributed to the strong adsorption of 4-NP molecules onto the cationic V matrix and Au2S nanoparticle surface along with effective donor–acceptor interactions between Au–Au2S nanoparticles and V facilitating the electron transfer at the hybrid interface.

Graphical abstract: One-pot synthesis of an Au/Au2S viologen hybrid nanocomposite for efficient catalytic applications

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Publication details

The article was received on 20 Feb 2015, accepted on 11 Mar 2015 and first published on 24 Mar 2015


Article type: Paper
DOI: 10.1039/C5TA01372K
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2015,3, 9731-9737
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    One-pot synthesis of an Au/Au2S viologen hybrid nanocomposite for efficient catalytic applications

    B. Gadgil, P. Damlin, A. Viinikanoja, M. Heinonen and C. Kvarnström, J. Mater. Chem. A, 2015, 3, 9731
    DOI: 10.1039/C5TA01372K

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