Govindaraju S, Puthiaraj P, Lee MH, Yun K. Photoluminescent AuNCs@UiO-66 for Ultrasensitive Detection of Mercury in Water Samples.
ACS OMEGA 2018;
3:12052-12059. [PMID:
31459285 PMCID:
PMC6645368 DOI:
10.1021/acsomega.8b01665]
[Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 09/13/2018] [Indexed: 05/31/2023]
Abstract
In this work, we synthesized gold nanoclusters within a Zirconium-based metal-organic framework (AuNCs@UiO-66) that may create new prospects for the development of novel sensing materials for biosensor applications. The resulting AuNCs@UiO-66 nanocomposite exhibits red fluorescence with a high quantum yield (11%), and the AuNCs are homogeneously distributed along UiO-66. Analytical and morphological characterizations of the resulting material were carried out by UV-visible spectroscopy, photoluminescence spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and high-resolution transmission electron microscopy. The synthesized AuNCs@UiO-66 nanocomposite was used for the effective detection of Hg2+ ions with a detection limit as low as 77 pM. Moreover, the fabricated sensors also successfully detected Hg2+ in real water samples. This sensor is stable and highly fluorescent, developed using a simple fabrication method, and would be constructive for the detection of other metal ions and in biological applications.
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