Abstract
We prepared the carboxymethyl-dithiocarbamate-functionalized silica nanoparticle for detecting silver ions in aqueous media. The functionalized silica nanoparticles were characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, transmission electron microscopy and thermogravimetric analysis. The functionalized silica nanoparticles realize highly sensitive and selective detection for Ag+ in aqueous solution with an apparent color change over a pH range of 4–6 and under interfering ions. The functionalized silica nanoparticles allow fast detection for Ag+ at 90 °C with a low minimum detectable concentration (0.09 mM). And a remarkable color change also occurs in the presence of Ag+ solutions containing EDTA. This developed technique can easy and fast detect silver ions by the naked eye without using any sophisticated instrumentation.
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Acknowledgments
The authors are grateful for the financial support from the National Natural Science Foundation (No. 51464024), the Yunnan Province Young Academic Technology Leader Reserve Talents (2012HB008) and the Yunnan Province Natural Science Foundation (2013FB096).
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Zhang, L., Zhang, G., Wang, S. et al. Carboxymethyl-dithiocarbamate-functionalized silica nanoparticles for naked-eye detection of Ag+ in aqueous medium. J Sol-Gel Sci Technol 80, 709–718 (2016). https://doi.org/10.1007/s10971-016-4164-3
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DOI: https://doi.org/10.1007/s10971-016-4164-3