Multifunctional Magnetic Mesoporous Silica Nanocomposites with Improved Sensing Performance and Effective Removal Ability toward Hg(II)

被引：142

作者：

Wang, Yanyan ^{[1
,2
]}

Li, Bin ^{[1
]}

Zhang, Liming ^{[1
]}

Li, Peng ^{[1
,2
]}

Wang, Lianlian ^{[1
,2
]}

Zhang, Jin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, State Key Lab Luminescence & Applicat, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

LANGMUIR | 2012年 / 28卷 / 02期

关键词：

SPHERICAL SILICA; AQUEOUS-SOLUTION; METAL-IONS; MICROSPHERES; FUNCTIONALITY; NANOPARTICLES; CONFINEMENT; CHEMISTRY; CHANNELS; QUANTUM;

D O I：

10.1021/la204494v

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

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, Xray 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 Hg2+ 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 Hg2+. These results indicate that these multifunctional nanocomposites may find potential applications for simple detection and easy removal of Hg2+ in biological, toxicological, and environmental areas.

引用

页码：1657 / 1662

页数：6

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