Dansyl derivative functionalized Fe3O4@SiO2fluorescent probe for detection and removal of Hg2+in aqueous solution

• DOI: 10.1039/c2ra21642f
• Publication Date: 2012-11-21T12:30:23Z
• Authors: Zhengping Dong; Xin Tian; Yuanzhe Chen; Yueping Guo; Jiantai Ma
• Keywords: Nanomaterials

In the present work, a novel dansyl group functionalized Fe3O4@SiO2 magnetic nanomaterial with core–shell structure was developed, aiming to detect and remove Hg2+ from aqueous media. The multifunctional nanocomposite shows excellent fluorescence sensitivity selectivity towards over other metal ions (Na+, K+, Mg2+, Al3+, Ca2+, Cd2+, Ni2+, Co2+, Fe3+, Zn2+, Pb2+, Cu2+, Ag+). Concentrations as low 10−8 M can be detected addition of has negligible influence on emission. Regarding reversibility nanosized sensor, DAP-Fe3O4@SiO2 in presence is found almost reversible when treated iodide anion. Additionally, easily separated solutions by adding an external field. Moreover, nanosphere good adsorption capacity Hg2+, which makes it repeatedly applicable for simultaneous sensing removal polluted water. These results indicate that may find potential applications simple detection easy biological environmental areas.