Synthesis of magnetic ion-imprinted fluorescent CdTe quantum dots by chemical etching and their visualization application for selective removal of Cd(II) from water

被引：32
作者：
Luo, Xubiao [1 ,2 ]
Guo, Bin [1 ,2 ]
Wang, Lichuan [1 ,2 ]
Deng, Fang [1 ,2 ]
Qi, Ruoxi [1 ,2 ]
Luo, Shenglian [1 ,2 ]
Au, Chaktong [3 ]
机构：
[1] Nanchang Hangkong Univ, Key Lab Jiangxi Prov Persistent Pollutants Contro, Nanchang 330063, Peoples R China
[2] Nanchang Hangkong Univ, Coll Environm & Chem Engn, Nanchang 330063, Peoples R China
[3] Hong Kong Baptist Univ, Dept Chem, Kowloon Tong, Hong Kong, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2014年 / 462卷
基金：
中国国家自然科学基金;
关键词：
Magnetic ion imprinted CdTe quantum dots; EDTA-etching method; Cd(II); Selectivity; SOL-GEL PROCESS; AQUEOUS-SOLUTIONS; TITANATE NANOTUBES; HYBRID SORBENT; ADSORPTION; EQUILIBRIUM; EXTRACTION; KINETICS; POLYMER; SPECTROMETRY;
D O I：
10.1016/j.colsurfa.2014.09.012
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel magnetic Cd(II)-imprinted fluorescent CdTe quantum dot (Fe3O4@CdTe-IIP) was synthesized through chemical etching strategy without the use of functional monomer and cross-linkers, and was used as an adsorbent for the removal of Cd(II) from water. Fe3O4@CdTe-IIP not only shows much higher adsorption capacity and selectivity for Cd(II) than the non-imprinted counterpart (Fe3O4@CdTe), but also exhibits good photoluminescence and magnetism. The adsorption capacities of Fe3O4@CdTe-IIP and Fe3O4@ CdTe for Cd(II) ions are 17.57 and 8.03 mg/g, respectively. The studies of adsorption kinetics show that the adsorption rate of Fe3O4@CdTe-IIP is fast, and the adsorption process fits well with a pseudo-second-order model. Moreover, the progress of the adsorption of Cd(II) ions on Fe3O4@CdTe-IIP can be monitored according to color change of Fe3O4@CdTe-IIP because of its fluorescent recovery. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：186 / 193
页数：8
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