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Naphthalimide-functionalized Fe3O4@SiO2 core/shell nanoparticles for selective and sensitive adsorption and detection of Hg2+

Authors :
Zhu, Baocun
Zhao, Jie
Yu, Haiqin
Yan, Liangguo
Wei, Qin
Du, Bin
Source :
Chemical Engineering Journal. Mar2013, Vol. 219, p411-418. 8p.
Publication Year :
2013

Abstract

Abstract: A novel 1,8-naphthalimide-functionalized Fe3O4@SiO2 core/shell magnetic fluorescent nanoparticles (MFNPs) for simultaneous detection and adsorption of Hg2+ was designed and synthesized. A series of adsorption studies were carried out with various Hg2+ concentrations, temperature, time and pH. The maximum adsorption capacity is higher than 30mg/g over a broad temperature (0°C, 25°C, and 50°C) and pH (4–10). The results showed that MFNPs possesses an excellent reusability and the high adsorption specificity toward Hg2+. The detection limit for Hg2+ is 3.4nM. In addition, owing to the aggregation of MFNPs occurring in the Hg2+ aqueous solution, the adsorbent was separated easily by the settlement or the external magnetic field, which facilitated the removal of Hg2+. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
13858947
Volume :
219
Database :
Academic Search Index
Journal :
Chemical Engineering Journal
Publication Type :
Academic Journal
Accession number :
86425677
Full Text :
https://doi.org/10.1016/j.cej.2012.12.068