期刊
MICROCHIMICA ACTA
卷 186, 期 7, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-019-3522-6
关键词
Metal-organic frameworks (MOFs); Bismuth; MOF; Differential pulse anodic stripping voltammetry (DPASV); Cd(II) and Pb(II) detection
资金
- National Natural Science Foundation of China [21771047, 21403048, 21401147, 21571045]
- University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province [UNPYSCT-2017183]
- Harbin Science and Technology Bureau [2016RAQXJ161]
- PhD Research Startup Program of Harbin Normal University, China [XKB201310]
The first example of metallic bismuth encapsulated into a mesoporous metal-organic framework of the type MIL-101(Cr) matrix is presented. Bi(III)-impregnated MIL-101(Cr) (Bi(III)/MIL-101(Cr)) was dropped onto a conductive carbon cloth electrode (CCE). Then, bismuth was generated by electrochemical reduction of the Bi(III)/MIL-101(Cr) supported on CCE (Bi/MIL101( Cr)/CCE). The resulting Bi/MIL-101(Cr)/CCE display impressive performance in terms of peak currents for the ions Cd(II) and Pb(II) when compared to the single-component counterparts. Differential pulse anodic stripping voltammetry (DPASV) enabled sensing of the two ions over linear working range of 0.1 to 30 mu g L-1 and 30 to 90 mu g L-1. The parameters are refined before the detection of two metal ions, including the amount of bismuth in MIL-101(Cr), optimum pH (5.0), deposition potential (-1.2 V) and deposition time (600 s). The respective detection limits are 60 and 70 ng L-1 (at S/N = 3). This is strikingly lower than the guideline values of domestic water given by the WHO which are 3 mu g L-1 for Cd(II) and 10 mu g L-1 for Pb(II). The Bi/ MIL-101(Cr) onto CCE is fairly specific for Cd(II) (at around -0.76 V) and Pb(II) (at around -0.54 V), well reproducible and has excellent recovery in real water analysis.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据