Issue 7, 2012

Core-shell mesoporous silica nanospheres used as Zn2+ ratiometric fluorescent sensor and adsorbent

Abstract

Core-shell mesoporous silica nanospheres encapsulated with rhodamine 101 into the solid core and 8-aminoquinoline derivatives into the mesoporous shell were used as a ratiometric fluorescent sensor to detect metal ions, which shows a high selectivity and sensitivity to Zn2+. Concentrations as low as 5 × 10−8 M can be detected and the addition of other metal ions has a negligible influence on the fluorescence emission. Moreover, the dye-doped nanospheres show excellent photostability, no dye leaking and a good adsorption capacity to Zn2+, which make it repeatedly applicable for simultaneous heavy metal ion sensing and removal from polluted water.

Graphical abstract: Core-shell mesoporous silica nanospheres used as Zn2+ ratiometric fluorescent sensor and adsorbent

Supplementary files

Article information

Article type
Paper
Submitted
16 Nov 2011
Accepted
20 Dec 2011
First published
08 Feb 2012

RSC Adv., 2012,2, 2783-2789

Core-shell mesoporous silica nanospheres used as Zn2+ ratiometric fluorescent sensor and adsorbent

D. Lu, L. Yang, Z. Tian, L. Wang and J. Zhang, RSC Adv., 2012, 2, 2783 DOI: 10.1039/C2RA01106A

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