Multifunctional magnetic mesoporous silica nanocomposites with improved sensing performance and effective removal ability toward Hg(II)
Document Type
Article
Publication Date
1-17-2012
Abstract
In the present work, a multifunctional inorganic-organic hybrid nanomaterial (MMS-Py) was prepared by the immobilization of a pyrene-based receptor (Py) within the channels of magnetic mesoporous silica nanocomposites (MMS), and characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, N 2 adsorption/desorption, superconducting quantum interference device, and photoluminescence spectra. This multifunctional nanomaterial exhibits superparamagnetic behavior, ordered mesoporous characteristics, and significantly improved fluorescence sensing properties that allow for highly sensitive and reproducible Hg 2+ detection. The fluorogenical responses of MMS-Py are stable over a broad pH range. A detection limit of 1.72 ppb is obtained, which is 2 orders of magnitude lower than that based on bulk mesoporous materials. Additionally, this nanomaterial shows high performance in convenient magnetic separability and efficient removal of Hg 2+. These results indicate that these multifunctional nanocomposites may find potential applications for simple detection and easy removal of Hg 2+ in biological, toxicological, and environmental areas. © 2011 American Chemical Society.
Publication Source (Journal or Book title)
Langmuir
First Page
1657
Last Page
1662
Recommended Citation
Wang, Y., Li, B., Zhang, L., Li, P., Wang, L., & Zhang, J. (2012). Multifunctional magnetic mesoporous silica nanocomposites with improved sensing performance and effective removal ability toward Hg(II). Langmuir, 28 (2), 1657-1662. https://doi.org/10.1021/la204494v
