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Issue 106, 2016, Issue in Progress
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Ultra-sensitive fluorescence determination of chromium(VI) in aqueous solution based on selectively etching of protein-stabled gold nanoclusters

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Abstract

In this work, we have developed a simple, cost-effective and sensitive fluorescent method for the selective determination of chromium(VI) ions (Cr(VI)) in aqueous solution. In the presence of bromide ions (Br), the strong oxidization of Cr(VI) enables it to selectively etch the bovine serum albumin-stabled gold nanoclusters (BSA-Au NCs) and formed AuBr2 complexes. Proportional fluorescence quenching of BSA-Au NCs induced by the leaching process was closely connected with concentrations of Cr(VI) and thus provided a new detecting strategy towards Cr(VI). Under optimal conditions, the amount-dependent fluorescent response was linearly correlated with the Cr(VI) concentrations ranging from 1.0 nM to 2.5 μM over 3 orders of magnitude, with a detection limit down to 0.6 nM. The as-developed strategy also performed satisfactory selectivity as well as excellent reproducibility. Moreover, this method had been successfully applied to monitor Cr(VI) with real river water samples which demonstrated the potential for field applications.

Graphical abstract: Ultra-sensitive fluorescence determination of chromium(vi) in aqueous solution based on selectively etching of protein-stabled gold nanoclusters

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Publication details

The article was received on 18 Sep 2016, accepted on 17 Oct 2016 and first published on 17 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA23222A
Citation: RSC Adv., 2016,6, 104693-104698
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    Ultra-sensitive fluorescence determination of chromium(VI) in aqueous solution based on selectively etching of protein-stabled gold nanoclusters

    G. Jian-feng, H. Chang-jun, Y. Mei, H. Dan-qun and F. Huan-bao, RSC Adv., 2016, 6, 104693
    DOI: 10.1039/C6RA23222A

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