A small molecular fluorescent sensor functionalized silica microsphere for detection and removal of mercury, cadmium, and lead ions in aqueous solutions

被引：69

作者：

Ding, Yu ^{[1
]}

Zhu, Weiping ^{[1
]}

Xu, Yufang ^{[1
]}

Qian, Xuhong ^{[1
]}

机构：

[1] E China Univ Sci & Technol, Shanghai Key Lab Chem Biol, Sch Pharm, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2015年 / 220卷

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Fluorescent sensor; Heavy metal ions; Detection; Removal; Reusable; MESOPOROUS SILICA; ADSORPTION; NANOPARTICLES; CHEMOSENSOR; PARTICLES; ZINC; CATIONS; GROWTH; SHELL; CORE;

D O I：

10.1016/j.snb.2015.05.113

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this paper, we report a sensitive fluorescent sensor (FSCHP) for detection and removal of toxic metal ions (Cd2+, Hg2+ and Pb2+) in aqueous samples. FSCHP is a 2,2-dipicolylamine (DPA) modified naphthalimide fluorophore followed by immobilization to the surface of silica microsphere and support high affinity for Cd2+, Hg2+ and Pb2+. Metal adsorption by FSCHP was featured by an enhancement in its fluorescence intensity. The limit of detection of 36 nM for Cd2+, 48 nM for Hg2+, and 39 nM for Pb2+, was measured respectively. Moreover, FSCHP can also be used as adsorbent for the separation of toxic metal ions in the contaminated aqueous solution with high adsorptivity, and can be regenerated by acid treatment. The metal ion removal capacity of FSCHP was retained after five removal/regeneration cycles. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：762 / 771

页数：10

共 46 条

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