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论文类型：期刊论文

发表时间：2014-01-01

发表刊物：ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS

收录刊物：SCIE、PubMed、Scopus

卷号：16

期号：1

页面范围：116-123

ISSN号：2050-7887

摘要：In order to conveniently and effectively detect the heavy metal ion Hg2+ existing in water, a magnetic fluorescence chemosensor has been strategically prepared by immobilizing a Rhodamine B derivative RhB-tris(2-aminoethyl)amine on Fe3O4@SiO2-Au@PSiO2 composites via gold particles. The adsorption and detection for Hg2+ ions were investigated with fluorophotometry. This chemosensor shows high sensitivity and high selectivity for Hg2+ over other metal cations owing to the ring opening of the rhodamine fluorophore selectively induced by Hg2+. In addition, the presence of Fe3O4 in the sensor also facilitates the magnetic separation of the Fe3O4@SiO2-Au-Hg2+@PSiO2 from the solution.