Competitive adsorption behavior toward metal ions on nano-Fe/Mg/Ni ternary layered double hydroxide proved by XPS: Evidence of selective and sensitive detection of Pb(II)

被引:85
作者
Li, Shan-Shan [1 ,2 ]
Jiang, Min [1 ,2 ]
Jiang, Tian-Jia [1 ,2 ]
Liu, Jin-Huai [1 ,2 ]
Guo, Zheng [1 ,2 ]
Huang, Xing-Jiu [1 ,2 ]
机构
[1] Chinese Acad Sci, Inst Intelligent Machines, Key Lab Environm Opt & Technol, Hefei 230031, Anhui, Peoples R China
[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
基金
中国国家自然科学基金;
关键词
Fe/Mg/Ni; Ternary layered double hydroxide; Lead; Electrochemistry; ANODIC-STRIPPING VOLTAMMETRY; CARBON-PASTE ELECTRODE; SIMULTANEOUS ELECTROCHEMICAL DETECTION; GRAPHENE OXIDE NANOCOMPOSITE; AQUEOUS-SOLUTION; FILM ELECTRODE; MAGNETIC NANOPARTICLES; EFFICIENT REMOVAL; LEAD IONS; NANOTUBES;
D O I
10.1016/j.jhazmat.2017.05.017
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Hypersensitive and highly selective nanomaterials for the measurement of heavy metal ions (HMIs) hold a key to electro-analysis. Various works improved the results of analysis but without scientific understanding. Herein, Fe/Mg/Ni-layered double hydroxide (LDH) has been successfully prepared and its electrochemical behavior for Pb(II) detection is also studied using square wave anodic stripping voltammetry (SWASV). The well performance of electrochemistry suggest that the modification with Fe/Mg/Ni-LDH significantly promotes the selectivity and sensitivity toward Pb(II). The sensitivity on Fe/Mg/Ni-LDH modified glassy carbon electrode (GCE) is 68.1 mu A mu M-1 over the range from 0.03 to 1.0 mu M under the optimized conditions. Otherwise, the selectivity, anti-interference, stability measurements and practical implications of Fe/Mg/Ni-LDH modified GCE are also performed. What's more, a reasonable mechanism of detection for Pb(II) including selectivity and sensitivity is proposed based on adsorption and characterized using XPS and XRD. These findings provide a potentially excellent material to improve the sensitivity and selectivity for toxic metal ions as well as a deep understanding of detection. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码:1 / 10
页数:10
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