Functionalized magnetic core-shell Fe@SiO2 nanoparticles as recoverable colorimetric sensor for Co2+ ion

被引：25

作者：

Jeong, Uiseok ^{[1
]}

Shin, Hyeon Ho ^{[1
]}

Kim, Younghun ^{[1
]}

机构：

[1] Kwangwoon Univ, Dept Chem Engn, Seoul 139701, South Korea

来源：

CHEMICAL ENGINEERING JOURNAL | 2015年 / 281卷

基金：

新加坡国家研究基金会;

关键词：

Colorimetric sensor; Core-shell; Cobalt ion; Surface plasmon resonance; Fe@SiO2; SILVER NANOPARTICLES; SURFACE;

D O I：

10.1016/j.cej.2015.07.006

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study presents a sensitive calorimetric probe for sensing Co2+ ions based on surface amine-modified iron oxide-silica core-shell nanoparticles (APTES-Fe@SiO2 NPs) and the appearance of an additional plasmonic peak in the UV-vis spectra due to NP aggregation. This calorimetric strategy based on the component dependence of core-shell NPs offered a highly sensitive and selective detection method for Co2+ ions. This cost-effective colorimetric probe afforded rapid, naked-eye detection of trace Co2+ ions at concentrations as low as 0.08 mM. The amine moiety of APTES-Fe@SiO2 NPs readily formed the metal-amine configuration complex (lambda(980) peak) and induced the formation of Co NPs by self-seed generation (lambda(520), lambda(590), and lambda(630) peaks). Preliminary study data supported the promising practical applicability of the current method for the calorimetric detection of Co2+ ions in aqueous phase. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：428 / 433

页数：6

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